diff --git a/wp-admin/admin-header.php b/wp-admin/admin-header.php
index 43f91483bc..9045620aa8 100644
--- a/wp-admin/admin-header.php
+++ b/wp-admin/admin-header.php
@@ -147,7 +147,7 @@ do_action( "admin_head-{$hook_suffix}" ); // phpcs:ignore WordPress.NamingConven
  */
 do_action( 'admin_head' );
 
-if ( get_user_setting( 'mfold' ) === 'f' ) {
+if ( 'f' === get_user_setting( 'mfold' ) ) {
 	$admin_body_class .= ' folded';
 }
 
diff --git a/wp-admin/edit-form-advanced.php b/wp-admin/edit-form-advanced.php
index 20aea33a3f..390fe7d254 100644
--- a/wp-admin/edit-form-advanced.php
+++ b/wp-admin/edit-form-advanced.php
@@ -59,7 +59,7 @@ if ( post_type_supports( $post_type, 'editor' ) && ! wp_is_mobile() &&
 
 	wp_enqueue_script( 'editor-expand' );
 	$_content_editor_dfw = true;
-	$_wp_editor_expand   = ( get_user_setting( 'editor_expand', 'on' ) === 'on' );
+	$_wp_editor_expand   = ( 'on' === get_user_setting( 'editor_expand', 'on' ) );
 }
 
 if ( wp_is_mobile() ) {
diff --git a/wp-admin/includes/ajax-actions.php b/wp-admin/includes/ajax-actions.php
index 3b551db6c0..8f0d1f8822 100644
--- a/wp-admin/includes/ajax-actions.php
+++ b/wp-admin/includes/ajax-actions.php
@@ -176,7 +176,7 @@ function wp_ajax_wp_compression_test() {
 		wp_die( -1 );
 	}
 
-	if ( ini_get( 'zlib.output_compression' ) || 'ob_gzhandler' == ini_get( 'output_handler' ) ) {
+	if ( ini_get( 'zlib.output_compression' ) || 'ob_gzhandler' === ini_get( 'output_handler' ) ) {
 		update_site_option( 'can_compress_scripts', 0 );
 		wp_die( 0 );
 	}
@@ -209,10 +209,10 @@ function wp_ajax_wp_compression_test() {
 
 			echo $out;
 			wp_die();
-		} elseif ( 'no' == $_GET['test'] ) {
+		} elseif ( 'no' === $_GET['test'] ) {
 			check_ajax_referer( 'update_can_compress_scripts' );
 			update_site_option( 'can_compress_scripts', 0 );
-		} elseif ( 'yes' == $_GET['test'] ) {
+		} elseif ( 'yes' === $_GET['test'] ) {
 			check_ajax_referer( 'update_can_compress_scripts' );
 			update_site_option( 'can_compress_scripts', 1 );
 		}
@@ -704,13 +704,13 @@ function wp_ajax_delete_comment() {
 	$delta  = -1;
 
 	if ( isset( $_POST['trash'] ) && 1 == $_POST['trash'] ) {
-		if ( 'trash' == $status ) {
+		if ( 'trash' === $status ) {
 			wp_die( time() );
 		}
 
 		$r = wp_trash_comment( $comment );
 	} elseif ( isset( $_POST['untrash'] ) && 1 == $_POST['untrash'] ) {
-		if ( 'trash' != $status ) {
+		if ( 'trash' !== $status ) {
 			wp_die( time() );
 		}
 
@@ -721,13 +721,13 @@ function wp_ajax_delete_comment() {
 			$delta = 1;
 		}
 	} elseif ( isset( $_POST['spam'] ) && 1 == $_POST['spam'] ) {
-		if ( 'spam' == $status ) {
+		if ( 'spam' === $status ) {
 			wp_die( time() );
 		}
 
 		$r = wp_spam_comment( $comment );
 	} elseif ( isset( $_POST['unspam'] ) && 1 == $_POST['unspam'] ) {
-		if ( 'spam' != $status ) {
+		if ( 'spam' !== $status ) {
 			wp_die( time() );
 		}
 
@@ -883,7 +883,7 @@ function wp_ajax_trash_post( $action ) {
 		wp_die( 1 );
 	}
 
-	if ( 'trash-post' == $action ) {
+	if ( 'trash-post' === $action ) {
 		$done = wp_trash_post( $id );
 	} else {
 		$done = wp_untrash_post( $id );
@@ -1301,7 +1301,7 @@ function wp_ajax_replyto_comment( $action ) {
 		wp_die( __( 'Sorry, you must be logged in to reply to a comment.' ) );
 	}
 
-	if ( '' == $comment_content ) {
+	if ( '' === $comment_content ) {
 		wp_die( __( 'Error: Please type a comment.' ) );
 	}
 
@@ -1344,11 +1344,11 @@ function wp_ajax_replyto_comment( $action ) {
 	$position = ( isset( $_POST['position'] ) && (int) $_POST['position'] ) ? (int) $_POST['position'] : '-1';
 
 	ob_start();
-	if ( isset( $_REQUEST['mode'] ) && 'dashboard' == $_REQUEST['mode'] ) {
+	if ( isset( $_REQUEST['mode'] ) && 'dashboard' === $_REQUEST['mode'] ) {
 		require_once ABSPATH . 'wp-admin/includes/dashboard.php';
 		_wp_dashboard_recent_comments_row( $comment );
 	} else {
-		if ( isset( $_REQUEST['mode'] ) && 'single' == $_REQUEST['mode'] ) {
+		if ( isset( $_REQUEST['mode'] ) && 'single' === $_REQUEST['mode'] ) {
 			$wp_list_table = _get_list_table( 'WP_Post_Comments_List_Table', array( 'screen' => 'edit-comments' ) );
 		} else {
 			$wp_list_table = _get_list_table( 'WP_Comments_List_Table', array( 'screen' => 'edit-comments' ) );
@@ -1403,7 +1403,7 @@ function wp_ajax_edit_comment() {
 		wp_die( -1 );
 	}
 
-	if ( '' == $_POST['content'] ) {
+	if ( '' === $_POST['content'] ) {
 		wp_die( __( 'Error: Please type a comment.' ) );
 	}
 
@@ -1461,7 +1461,7 @@ function wp_ajax_add_menu_item() {
 	foreach ( (array) $_POST['menu-item'] as $menu_item_data ) {
 		if (
 			! empty( $menu_item_data['menu-item-type'] ) &&
-			'custom' != $menu_item_data['menu-item-type'] &&
+			'custom' !== $menu_item_data['menu-item-type'] &&
 			! empty( $menu_item_data['menu-item-object-id'] )
 		) {
 			switch ( $menu_item_data['menu-item-type'] ) {
@@ -1544,7 +1544,7 @@ function wp_ajax_add_meta() {
 			wp_die( -1 );
 		}
 
-		if ( isset( $_POST['metakeyselect'] ) && '#NONE#' == $_POST['metakeyselect'] && empty( $_POST['metakeyinput'] ) ) {
+		if ( isset( $_POST['metakeyselect'] ) && '#NONE#' === $_POST['metakeyselect'] && empty( $_POST['metakeyinput'] ) ) {
 			wp_die( 1 );
 		}
 
@@ -1604,7 +1604,7 @@ function wp_ajax_add_meta() {
 		$key   = wp_unslash( $_POST['meta'][ $mid ]['key'] );
 		$value = wp_unslash( $_POST['meta'][ $mid ]['value'] );
 
-		if ( '' == trim( $key ) ) {
+		if ( '' === trim( $key ) ) {
 			wp_die( __( 'Please provide a custom field name.' ) );
 		}
 
@@ -1795,11 +1795,11 @@ function wp_ajax_menu_get_metabox() {
 
 	require_once ABSPATH . 'wp-admin/includes/nav-menu.php';
 
-	if ( isset( $_POST['item-type'] ) && 'post_type' == $_POST['item-type'] ) {
+	if ( isset( $_POST['item-type'] ) && 'post_type' === $_POST['item-type'] ) {
 		$type     = 'posttype';
 		$callback = 'wp_nav_menu_item_post_type_meta_box';
 		$items    = (array) get_post_types( array( 'show_in_nav_menus' => true ), 'object' );
-	} elseif ( isset( $_POST['item-type'] ) && 'taxonomy' == $_POST['item-type'] ) {
+	} elseif ( isset( $_POST['item-type'] ) && 'taxonomy' === $_POST['item-type'] ) {
 		$type     = 'taxonomy';
 		$callback = 'wp_nav_menu_item_taxonomy_meta_box';
 		$items    = (array) get_taxonomies( array( 'show_ui' => true ), 'object' );
@@ -1985,7 +1985,7 @@ function wp_ajax_inline_save() {
 
 	$post_ID = (int) $_POST['post_ID'];
 
-	if ( 'page' == $_POST['post_type'] ) {
+	if ( 'page' === $_POST['post_type'] ) {
 		if ( ! current_user_can( 'edit_page', $post_ID ) ) {
 			wp_die( __( 'Sorry, you are not allowed to edit this page.' ) );
 		}
@@ -2030,7 +2030,7 @@ function wp_ajax_inline_save() {
 	}
 
 	// Status.
-	if ( isset( $data['keep_private'] ) && 'private' == $data['keep_private'] ) {
+	if ( isset( $data['keep_private'] ) && 'private' === $data['keep_private'] ) {
 		$data['visibility']  = 'private';
 		$data['post_status'] = 'private';
 	} else {
@@ -2180,7 +2180,7 @@ function wp_ajax_find_posts() {
 	$alt  = '';
 	foreach ( $posts as $post ) {
 		$title = trim( $post->post_title ) ? $post->post_title : __( '(no title)' );
-		$alt   = ( 'alternate' == $alt ) ? '' : 'alternate';
+		$alt   = ( 'alternate' === $alt ) ? '' : 'alternate';
 
 		switch ( $post->post_status ) {
 			case 'publish':
@@ -2198,7 +2198,7 @@ function wp_ajax_find_posts() {
 				break;
 		}
 
-		if ( '0000-00-00 00:00:00' == $post->post_date ) {
+		if ( '0000-00-00 00:00:00' === $post->post_date ) {
 			$time = '';
 		} else {
 			/* translators: Date format in table columns, see https://www.php.net/date */
@@ -2883,7 +2883,7 @@ function wp_ajax_get_attachment() {
 		wp_send_json_error();
 	}
 
-	if ( 'attachment' != $post->post_type ) {
+	if ( 'attachment' !== $post->post_type ) {
 		wp_send_json_error();
 	}
 
@@ -2996,7 +2996,7 @@ function wp_ajax_save_attachment() {
 	$changes = $_REQUEST['changes'];
 	$post    = get_post( $id, ARRAY_A );
 
-	if ( 'attachment' != $post['post_type'] ) {
+	if ( 'attachment' !== $post['post_type'] ) {
 		wp_send_json_error();
 	}
 
@@ -3087,7 +3087,7 @@ function wp_ajax_save_attachment_compat() {
 
 	$post = get_post( $id, ARRAY_A );
 
-	if ( 'attachment' != $post['post_type'] ) {
+	if ( 'attachment' !== $post['post_type'] ) {
 		wp_send_json_error();
 	}
 
@@ -3154,7 +3154,7 @@ function wp_ajax_save_attachment_order() {
 			continue;
 		}
 
-		if ( 'attachment' != $attachment->post_type ) {
+		if ( 'attachment' !== $attachment->post_type ) {
 			continue;
 		}
 
@@ -3190,7 +3190,7 @@ function wp_ajax_send_attachment_to_editor() {
 		wp_send_json_error();
 	}
 
-	if ( 'attachment' != $post->post_type ) {
+	if ( 'attachment' !== $post->post_type ) {
 		wp_send_json_error();
 	}
 
@@ -3304,7 +3304,7 @@ function wp_ajax_send_link_to_editor() {
 	$ext  = preg_replace( '/^.+?\.([^.]+)$/', '$1', $src );
 	if ( $ext ) {
 		$ext_type = wp_ext2type( $ext );
-		if ( 'audio' == $ext_type || 'video' == $ext_type ) {
+		if ( 'audio' === $ext_type || 'video' === $ext_type ) {
 			$type = $ext_type;
 		}
 	}
diff --git a/wp-admin/includes/bookmark.php b/wp-admin/includes/bookmark.php
index ededc33fa4..124f9cf698 100644
--- a/wp-admin/includes/bookmark.php
+++ b/wp-admin/includes/bookmark.php
@@ -39,7 +39,7 @@ function edit_link( $link_id = 0 ) {
 	$_POST['link_name']  = esc_html( $_POST['link_name'] );
 	$_POST['link_image'] = esc_html( $_POST['link_image'] );
 	$_POST['link_rss']   = esc_url( $_POST['link_rss'] );
-	if ( ! isset( $_POST['link_visible'] ) || 'N' != $_POST['link_visible'] ) {
+	if ( ! isset( $_POST['link_visible'] ) || 'N' !== $_POST['link_visible'] ) {
 		$_POST['link_visible'] = 'Y';
 	}
 
@@ -174,15 +174,15 @@ function wp_insert_link( $linkdata, $wp_error = false ) {
 		$update = true;
 	}
 
-	if ( trim( $link_name ) == '' ) {
-		if ( trim( $link_url ) != '' ) {
+	if ( '' === trim( $link_name ) ) {
+		if ( '' !== trim( $link_url ) ) {
 			$link_name = $link_url;
 		} else {
 			return 0;
 		}
 	}
 
-	if ( trim( $link_url ) == '' ) {
+	if ( '' === trim( $link_url ) ) {
 		return 0;
 	}
 
@@ -309,7 +309,8 @@ function wp_update_link( $linkdata ) {
  */
 function wp_link_manager_disabled_message() {
 	global $pagenow;
-	if ( 'link-manager.php' != $pagenow && 'link-add.php' != $pagenow && 'link.php' != $pagenow ) {
+
+	if ( ! in_array( $pagenow, array( 'link-manager.php', 'link-add.php', 'link.php' ), true ) ) {
 		return;
 	}
 
diff --git a/wp-admin/includes/class-core-upgrader.php b/wp-admin/includes/class-core-upgrader.php
index 7c782606d3..7ef49f1f1c 100644
--- a/wp-admin/includes/class-core-upgrader.php
+++ b/wp-admin/includes/class-core-upgrader.php
@@ -104,7 +104,7 @@ class Core_Upgrader extends WP_Upgrader {
 		 */
 		if ( $parsed_args['do_rollback'] && $current->packages->rollback ) {
 			$to_download = 'rollback';
-		} elseif ( $current->packages->partial && 'reinstall' != $current->response && $wp_version == $current->partial_version && $partial ) {
+		} elseif ( $current->packages->partial && 'reinstall' !== $current->response && $wp_version == $current->partial_version && $partial ) {
 			$to_download = 'partial';
 		} elseif ( $current->packages->new_bundled && version_compare( $wp_version, $current->new_bundled, '<' )
 			&& ( ! defined( 'CORE_UPGRADE_SKIP_NEW_BUNDLED' ) || ! CORE_UPGRADE_SKIP_NEW_BUNDLED ) ) {
@@ -402,7 +402,7 @@ class Core_Upgrader extends WP_Upgrader {
 
 		foreach ( $checksums as $file => $checksum ) {
 			// Skip files which get updated.
-			if ( 'wp-content' == substr( $file, 0, 10 ) ) {
+			if ( 'wp-content' === substr( $file, 0, 10 ) ) {
 				continue;
 			}
 			if ( ! file_exists( ABSPATH . $file ) || md5_file( ABSPATH . $file ) !== $checksum ) {
diff --git a/wp-admin/includes/class-custom-image-header.php b/wp-admin/includes/class-custom-image-header.php
index a8264d5bb7..fe0a2e5015 100644
--- a/wp-admin/includes/class-custom-image-header.php
+++ b/wp-admin/includes/class-custom-image-header.php
@@ -281,7 +281,7 @@ class Custom_Image_Header {
 	 *                     or 'uploaded' (for the Uploaded Images control).
 	 */
 	public function show_header_selector( $type = 'default' ) {
-		if ( 'default' == $type ) {
+		if ( 'default' === $type ) {
 			$headers = $this->default_headers;
 		} else {
 			$headers = get_uploaded_header_images();
@@ -359,7 +359,7 @@ class Custom_Image_Header {
 		if ( ! checked )
 			return;
 		text_color = $('#text-color');
-		if ( '' == text_color.val().replace('#', '') ) {
+		if ( '' === text_color.val().replace('#', '') ) {
 			text_color.val( default_color );
 			pickColor( default_color );
 		} else {
diff --git a/wp-admin/includes/class-language-pack-upgrader.php b/wp-admin/includes/class-language-pack-upgrader.php
index 0ae18d9e50..e88db55848 100644
--- a/wp-admin/includes/class-language-pack-upgrader.php
+++ b/wp-admin/includes/class-language-pack-upgrader.php
@@ -188,7 +188,7 @@ class Language_Pack_Upgrader extends WP_Upgrader {
 			return true;
 		}
 
-		if ( 'upgrader_process_complete' == current_filter() ) {
+		if ( 'upgrader_process_complete' === current_filter() ) {
 			$this->skin->feedback( 'starting_upgrade' );
 		}
 
@@ -232,9 +232,9 @@ class Language_Pack_Upgrader extends WP_Upgrader {
 			$this->skin->language_update = $language_update;
 
 			$destination = WP_LANG_DIR;
-			if ( 'plugin' == $language_update->type ) {
+			if ( 'plugin' === $language_update->type ) {
 				$destination .= '/plugins';
-			} elseif ( 'theme' == $language_update->type ) {
+			} elseif ( 'theme' === $language_update->type ) {
 				$destination .= '/themes';
 			}
 
@@ -335,9 +335,9 @@ class Language_Pack_Upgrader extends WP_Upgrader {
 		$po = false;
 		$mo = false;
 		foreach ( (array) $files as $file => $filedata ) {
-			if ( '.po' == substr( $file, -3 ) ) {
+			if ( '.po' === substr( $file, -3 ) ) {
 				$po = true;
-			} elseif ( '.mo' == substr( $file, -3 ) ) {
+			} elseif ( '.mo' === substr( $file, -3 ) ) {
 				$mo = true;
 			}
 		}
diff --git a/wp-admin/includes/class-plugin-installer-skin.php b/wp-admin/includes/class-plugin-installer-skin.php
index 9ee23be90b..cb44919c66 100644
--- a/wp-admin/includes/class-plugin-installer-skin.php
+++ b/wp-admin/includes/class-plugin-installer-skin.php
@@ -60,13 +60,13 @@ class Plugin_Installer_Skin extends WP_Upgrader_Skin {
 
 		$from = isset( $_GET['from'] ) ? wp_unslash( $_GET['from'] ) : 'plugins';
 
-		if ( 'import' == $from ) {
+		if ( 'import' === $from ) {
 			$install_actions['activate_plugin'] = sprintf(
 				'<a class="button button-primary" href="%s" target="_parent">%s</a>',
 				wp_nonce_url( 'plugins.php?action=activate&amp;from=import&amp;plugin=' . urlencode( $plugin_file ), 'activate-plugin_' . $plugin_file ),
 				__( 'Activate Plugin &amp; Run Importer' )
 			);
-		} elseif ( 'press-this' == $from ) {
+		} elseif ( 'press-this' === $from ) {
 			$install_actions['activate_plugin'] = sprintf(
 				'<a class="button button-primary" href="%s" target="_parent">%s</a>',
 				wp_nonce_url( 'plugins.php?action=activate&amp;from=press-this&amp;plugin=' . urlencode( $plugin_file ), 'activate-plugin_' . $plugin_file ),
diff --git a/wp-admin/includes/class-walker-nav-menu-checklist.php b/wp-admin/includes/class-walker-nav-menu-checklist.php
index f166a8803d..11e78dd529 100644
--- a/wp-admin/includes/class-walker-nav-menu-checklist.php
+++ b/wp-admin/includes/class-walker-nav-menu-checklist.php
@@ -75,7 +75,7 @@ class Walker_Nav_Menu_Checklist extends Walker_Nav_Menu {
 		global $_nav_menu_placeholder, $nav_menu_selected_id;
 
 		$_nav_menu_placeholder = ( 0 > $_nav_menu_placeholder ) ? intval( $_nav_menu_placeholder ) - 1 : -1;
-		$possible_object_id    = isset( $item->post_type ) && 'nav_menu_item' == $item->post_type ? $item->object_id : $_nav_menu_placeholder;
+		$possible_object_id    = isset( $item->post_type ) && 'nav_menu_item' === $item->post_type ? $item->object_id : $_nav_menu_placeholder;
 		$possible_db_id        = ( ! empty( $item->ID ) ) && ( 0 < $possible_object_id ) ? (int) $item->ID : 0;
 
 		$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
diff --git a/wp-admin/includes/class-walker-nav-menu-edit.php b/wp-admin/includes/class-walker-nav-menu-edit.php
index 183077aab7..fd5ea85219 100644
--- a/wp-admin/includes/class-walker-nav-menu-edit.php
+++ b/wp-admin/includes/class-walker-nav-menu-edit.php
@@ -72,17 +72,17 @@ class Walker_Nav_Menu_Edit extends Walker_Nav_Menu {
 
 		$original_title = false;
 
-		if ( 'taxonomy' == $item->type ) {
+		if ( 'taxonomy' === $item->type ) {
 			$original_object = get_term( (int) $item->object_id, $item->object );
 			if ( $original_object && ! is_wp_error( $original_title ) ) {
 				$original_title = $original_object->name;
 			}
-		} elseif ( 'post_type' == $item->type ) {
+		} elseif ( 'post_type' === $item->type ) {
 			$original_object = get_post( $item->object_id );
 			if ( $original_object ) {
 				$original_title = get_the_title( $original_object->ID );
 			}
-		} elseif ( 'post_type_archive' == $item->type ) {
+		} elseif ( 'post_type_archive' === $item->type ) {
 			$original_object = get_post_type_object( $item->object );
 			if ( $original_object ) {
 				$original_title = $original_object->labels->archives;
@@ -101,13 +101,13 @@ class Walker_Nav_Menu_Edit extends Walker_Nav_Menu {
 			$classes[] = 'menu-item-invalid';
 			/* translators: %s: Title of an invalid menu item. */
 			$title = sprintf( __( '%s (Invalid)' ), $item->title );
-		} elseif ( isset( $item->post_status ) && 'draft' == $item->post_status ) {
+		} elseif ( isset( $item->post_status ) && 'draft' === $item->post_status ) {
 			$classes[] = 'pending';
 			/* translators: %s: Title of a menu item in draft status. */
 			$title = sprintf( __( '%s (Pending)' ), $item->title );
 		}
 
-		$title = ( ! isset( $item->label ) || '' == $item->label ) ? $title : $item->label;
+		$title = ( ! isset( $item->label ) || '' === $item->label ) ? $title : $item->label;
 
 		$submenu_text = '';
 		if ( 0 == $depth ) {
@@ -181,7 +181,7 @@ class Walker_Nav_Menu_Edit extends Walker_Nav_Menu {
 			</div>
 
 			<div class="menu-item-settings wp-clearfix" id="menu-item-settings-<?php echo $item_id; ?>">
-				<?php if ( 'custom' == $item->type ) : ?>
+				<?php if ( 'custom' === $item->type ) : ?>
 					<p class="field-url description description-wide">
 						<label for="edit-menu-item-url-<?php echo $item_id; ?>">
 							<?php _e( 'URL' ); ?><br />
diff --git a/wp-admin/includes/class-wp-automatic-updater.php b/wp-admin/includes/class-wp-automatic-updater.php
index 10461f8f50..3780512efa 100644
--- a/wp-admin/includes/class-wp-automatic-updater.php
+++ b/wp-admin/includes/class-wp-automatic-updater.php
@@ -143,20 +143,20 @@ class WP_Automatic_Updater {
 
 		// Only relax the filesystem checks when the update doesn't include new files.
 		$allow_relaxed_file_ownership = false;
-		if ( 'core' == $type && isset( $item->new_files ) && ! $item->new_files ) {
+		if ( 'core' === $type && isset( $item->new_files ) && ! $item->new_files ) {
 			$allow_relaxed_file_ownership = true;
 		}
 
 		// If we can't do an auto core update, we may still be able to email the user.
 		if ( ! $skin->request_filesystem_credentials( false, $context, $allow_relaxed_file_ownership ) || $this->is_vcs_checkout( $context ) ) {
-			if ( 'core' == $type ) {
+			if ( 'core' === $type ) {
 				$this->send_core_update_notification_email( $item );
 			}
 			return false;
 		}
 
 		// Next up, is this an item we can update?
-		if ( 'core' == $type ) {
+		if ( 'core' === $type ) {
 			$update = Core_Upgrader::should_update_to_version( $item->current );
 		} else {
 			$update = ! empty( $item->autoupdate );
@@ -184,14 +184,14 @@ class WP_Automatic_Updater {
 		$update = apply_filters( "auto_update_{$type}", $update, $item );
 
 		if ( ! $update ) {
-			if ( 'core' == $type ) {
+			if ( 'core' === $type ) {
 				$this->send_core_update_notification_email( $item );
 			}
 			return false;
 		}
 
 		// If it's a core update, are we actually compatible with its requirements?
-		if ( 'core' == $type ) {
+		if ( 'core' === $type ) {
 			global $wpdb;
 
 			$php_compat = version_compare( phpversion(), $item->php_version, '>=' );
@@ -344,7 +344,7 @@ class WP_Automatic_Updater {
 		}
 
 		$allow_relaxed_file_ownership = false;
-		if ( 'core' == $type && isset( $item->new_files ) && ! $item->new_files ) {
+		if ( 'core' === $type && isset( $item->new_files ) && ! $item->new_files ) {
 			$allow_relaxed_file_ownership = true;
 		}
 
@@ -367,9 +367,13 @@ class WP_Automatic_Updater {
 			$upgrade_result = new WP_Error( 'fs_unavailable', __( 'Could not access filesystem.' ) );
 		}
 
-		if ( 'core' == $type ) {
-			if ( is_wp_error( $upgrade_result ) && ( 'up_to_date' == $upgrade_result->get_error_code() || 'locked' == $upgrade_result->get_error_code() ) ) {
-				// These aren't actual errors, treat it as a skipped-update instead to avoid triggering the post-core update failure routines.
+		if ( 'core' === $type ) {
+			if ( is_wp_error( $upgrade_result )
+				&& ( 'up_to_date' === $upgrade_result->get_error_code()
+					|| 'locked' === $upgrade_result->get_error_code() )
+			) {
+				// These aren't actual errors, treat it as a skipped-update instead
+				// to avoid triggering the post-core update failure routines.
 				return false;
 			}
 
@@ -626,11 +630,13 @@ class WP_Automatic_Updater {
 		);
 
 		$next_user_core_update = get_preferred_from_update_core();
+
 		// If the update transient is empty, use the update we just performed.
 		if ( ! $next_user_core_update ) {
 			$next_user_core_update = $core_update;
 		}
-		$newer_version_available = ( 'upgrade' == $next_user_core_update->response && version_compare( $next_user_core_update->version, $core_update->version, '>' ) );
+
+		$newer_version_available = ( 'upgrade' === $next_user_core_update->response && version_compare( $next_user_core_update->version, $core_update->version, '>' ) );
 
 		/**
 		 * Filters whether to send an email following an automatic background core update.
@@ -715,7 +721,7 @@ class WP_Automatic_Updater {
 
 				// Don't show this message if there is a newer version available.
 				// Potential for confusion, and also not useful for them to know at this point.
-				if ( 'fail' == $type && ! $newer_version_available ) {
+				if ( 'fail' === $type && ! $newer_version_available ) {
 					$body .= __( 'We tried but were unable to update your site automatically.' ) . ' ';
 				}
 
@@ -778,7 +784,7 @@ class WP_Automatic_Updater {
 
 		$body .= "\n\n" . __( 'The WordPress Team' ) . "\n";
 
-		if ( 'critical' == $type && is_wp_error( $result ) ) {
+		if ( 'critical' === $type && is_wp_error( $result ) ) {
 			$body .= "\n***\n\n";
 			/* translators: %s: WordPress version. */
 			$body .= sprintf( __( 'Your site was running version %s.' ), get_bloginfo( 'version' ) );
@@ -787,7 +793,7 @@ class WP_Automatic_Updater {
 
 			// If we had a rollback and we're still critical, then the rollback failed too.
 			// Loop through all errors (the main WP_Error, the update result, the rollback result) for code, data, etc.
-			if ( 'rollback_was_required' == $result->get_error_code() ) {
+			if ( 'rollback_was_required' === $result->get_error_code() ) {
 				$errors = array( $result, $result->get_error_data()->update, $result->get_error_data()->rollback );
 			} else {
 				$errors = array( $result );
@@ -797,20 +803,25 @@ class WP_Automatic_Updater {
 				if ( ! is_wp_error( $error ) ) {
 					continue;
 				}
+
 				$error_code = $error->get_error_code();
 				/* translators: %s: Error code. */
 				$body .= "\n\n" . sprintf( __( 'Error code: %s' ), $error_code );
-				if ( 'rollback_was_required' == $error_code ) {
+
+				if ( 'rollback_was_required' === $error_code ) {
 					continue;
 				}
+
 				if ( $error->get_error_message() ) {
 					$body .= "\n" . $error->get_error_message();
 				}
+
 				$error_data = $error->get_error_data();
 				if ( $error_data ) {
 					$body .= "\n" . implode( ', ', (array) $error_data );
 				}
 			}
+
 			$body .= "\n";
 		}
 
diff --git a/wp-admin/includes/class-wp-comments-list-table.php b/wp-admin/includes/class-wp-comments-list-table.php
index 9b273f42fb..e3678b60d5 100644
--- a/wp-admin/includes/class-wp-comments-list-table.php
+++ b/wp-admin/includes/class-wp-comments-list-table.php
@@ -276,7 +276,7 @@ class WP_Comments_List_Table extends WP_List_Table {
 		}
 
 		$link = admin_url( 'edit-comments.php' );
-		if ( ! empty( $comment_type ) && 'all' != $comment_type ) {
+		if ( ! empty( $comment_type ) && 'all' !== $comment_type ) {
 			$link = add_query_arg( 'comment_type', $comment_type, $link );
 		}
 
@@ -634,7 +634,7 @@ class WP_Comments_List_Table extends WP_List_Table {
 		);
 
 		// Not looking at all comments.
-		if ( $comment_status && 'all' != $comment_status ) {
+		if ( $comment_status && 'all' !== $comment_status ) {
 			if ( 'approved' === $the_comment_status ) {
 				$actions['unapprove'] = sprintf(
 					'<a href="%s" data-wp-lists="%s" class="vim-u vim-destructive aria-button-if-js" aria-label="%s">%s</a>',
diff --git a/wp-admin/includes/class-wp-filesystem-base.php b/wp-admin/includes/class-wp-filesystem-base.php
index fe96929b5c..7d96de0676 100644
--- a/wp-admin/includes/class-wp-filesystem-base.php
+++ b/wp-admin/includes/class-wp-filesystem-base.php
@@ -98,7 +98,7 @@ class WP_Filesystem_Base {
 		$theme_root = get_theme_root( $theme );
 
 		// Account for relative theme roots.
-		if ( '/themes' == $theme_root || ! is_dir( $theme_root ) ) {
+		if ( '/themes' === $theme_root || ! is_dir( $theme_root ) ) {
 			$theme_root = WP_CONTENT_DIR . $theme_root;
 		}
 
@@ -208,7 +208,7 @@ class WP_Filesystem_Base {
 					}
 				}
 			}
-		} elseif ( 'direct' == $this->method ) {
+		} elseif ( 'direct' === $this->method ) {
 			$folder = str_replace( '\\', '/', $folder ); // Windows path sanitisation.
 			return trailingslashit( $folder );
 		}
@@ -245,7 +245,7 @@ class WP_Filesystem_Base {
 	 * @return string|false The location of the remote path, false to cease looping.
 	 */
 	public function search_for_folder( $folder, $base = '.', $loop = false ) {
-		if ( empty( $base ) || '.' == $base ) {
+		if ( empty( $base ) || '.' === $base ) {
 			$base = trailingslashit( $this->cwd() );
 		}
 
@@ -305,7 +305,7 @@ class WP_Filesystem_Base {
 
 		// Prevent this function from looping again.
 		// No need to proceed if we've just searched in `/`.
-		if ( $loop || '/' == $base ) {
+		if ( $loop || '/' === $base ) {
 			return false;
 		}
 
diff --git a/wp-admin/includes/class-wp-filesystem-direct.php b/wp-admin/includes/class-wp-filesystem-direct.php
index 1676a55658..7551e3d273 100644
--- a/wp-admin/includes/class-wp-filesystem-direct.php
+++ b/wp-admin/includes/class-wp-filesystem-direct.php
@@ -333,7 +333,7 @@ class WP_Filesystem_Direct extends WP_Filesystem_Base {
 		}
 		$file = str_replace( '\\', '/', $file ); // For Win32, occasional problems deleting files otherwise.
 
-		if ( 'f' == $type || $this->is_file( $file ) ) {
+		if ( 'f' === $type || $this->is_file( $file ) ) {
 			return @unlink( $file );
 		}
 		if ( ! $recursive && $this->is_dir( $file ) ) {
@@ -580,11 +580,11 @@ class WP_Filesystem_Direct extends WP_Filesystem_Base {
 			$struc         = array();
 			$struc['name'] = $entry;
 
-			if ( '.' == $struc['name'] || '..' == $struc['name'] ) {
+			if ( '.' === $struc['name'] || '..' === $struc['name'] ) {
 				continue;
 			}
 
-			if ( ! $include_hidden && '.' == $struc['name'][0] ) {
+			if ( ! $include_hidden && '.' === $struc['name'][0] ) {
 				continue;
 			}
 
@@ -603,7 +603,7 @@ class WP_Filesystem_Direct extends WP_Filesystem_Base {
 			$struc['time']        = gmdate( 'h:i:s', $struc['lastmodunix'] );
 			$struc['type']        = $this->is_dir( $path . '/' . $entry ) ? 'd' : 'f';
 
-			if ( 'd' == $struc['type'] ) {
+			if ( 'd' === $struc['type'] ) {
 				if ( $recursive ) {
 					$struc['files'] = $this->dirlist( $path . '/' . $struc['name'], $include_hidden, $recursive );
 				} else {
diff --git a/wp-admin/includes/class-wp-filesystem-ftpext.php b/wp-admin/includes/class-wp-filesystem-ftpext.php
index 241621e852..b1a65fc524 100644
--- a/wp-admin/includes/class-wp-filesystem-ftpext.php
+++ b/wp-admin/includes/class-wp-filesystem-ftpext.php
@@ -69,7 +69,7 @@ class WP_Filesystem_FTPext extends WP_Filesystem_Base {
 		}
 
 		$this->options['ssl'] = false;
-		if ( isset( $opt['connection_type'] ) && 'ftps' == $opt['connection_type'] ) {
+		if ( isset( $opt['connection_type'] ) && 'ftps' === $opt['connection_type'] ) {
 			$this->options['ssl'] = true;
 		}
 	}
@@ -373,7 +373,7 @@ class WP_Filesystem_FTPext extends WP_Filesystem_Base {
 		if ( empty( $file ) ) {
 			return false;
 		}
-		if ( 'f' == $type || $this->is_file( $file ) ) {
+		if ( 'f' === $type || $this->is_file( $file ) ) {
 			return ftp_delete( $this->link, $file );
 		}
 		if ( ! $recursive ) {
@@ -695,11 +695,11 @@ class WP_Filesystem_FTPext extends WP_Filesystem_Base {
 				continue;
 			}
 
-			if ( '.' == $entry['name'] || '..' == $entry['name'] ) {
+			if ( '.' === $entry['name'] || '..' === $entry['name'] ) {
 				continue;
 			}
 
-			if ( ! $include_hidden && '.' == $entry['name'][0] ) {
+			if ( ! $include_hidden && '.' === $entry['name'][0] ) {
 				continue;
 			}
 
@@ -712,7 +712,7 @@ class WP_Filesystem_FTPext extends WP_Filesystem_Base {
 
 		$ret = array();
 		foreach ( (array) $dirlist as $struc ) {
-			if ( 'd' == $struc['type'] ) {
+			if ( 'd' === $struc['type'] ) {
 				if ( $recursive ) {
 					$struc['files'] = $this->dirlist( $path . '/' . $struc['name'], $include_hidden, $recursive );
 				} else {
diff --git a/wp-admin/includes/class-wp-filesystem-ftpsockets.php b/wp-admin/includes/class-wp-filesystem-ftpsockets.php
index 26ee71c0d5..c200372788 100644
--- a/wp-admin/includes/class-wp-filesystem-ftpsockets.php
+++ b/wp-admin/includes/class-wp-filesystem-ftpsockets.php
@@ -383,7 +383,7 @@ class WP_Filesystem_ftpsockets extends WP_Filesystem_Base {
 		if ( empty( $file ) ) {
 			return false;
 		}
-		if ( 'f' == $type || $this->is_file( $file ) ) {
+		if ( 'f' === $type || $this->is_file( $file ) ) {
 			return $this->ftp->delete( $file );
 		}
 		if ( ! $recursive ) {
@@ -615,11 +615,11 @@ class WP_Filesystem_ftpsockets extends WP_Filesystem_Base {
 		$ret = array();
 		foreach ( $list as $struc ) {
 
-			if ( '.' == $struc['name'] || '..' == $struc['name'] ) {
+			if ( '.' === $struc['name'] || '..' === $struc['name'] ) {
 				continue;
 			}
 
-			if ( ! $include_hidden && '.' == $struc['name'][0] ) {
+			if ( ! $include_hidden && '.' === $struc['name'][0] ) {
 				continue;
 			}
 
@@ -627,7 +627,7 @@ class WP_Filesystem_ftpsockets extends WP_Filesystem_Base {
 				continue;
 			}
 
-			if ( 'd' == $struc['type'] ) {
+			if ( 'd' === $struc['type'] ) {
 				if ( $recursive ) {
 					$struc['files'] = $this->dirlist( $path . '/' . $struc['name'], $include_hidden, $recursive );
 				} else {
diff --git a/wp-admin/includes/class-wp-filesystem-ssh2.php b/wp-admin/includes/class-wp-filesystem-ssh2.php
index 03e0f798b7..c099259e1f 100644
--- a/wp-admin/includes/class-wp-filesystem-ssh2.php
+++ b/wp-admin/includes/class-wp-filesystem-ssh2.php
@@ -227,7 +227,7 @@ class WP_Filesystem_SSH2 extends WP_Filesystem_Base {
 			fclose( $stream );
 
 			if ( $returnbool ) {
-				return ( false === $data ) ? false : '' != trim( $data );
+				return ( false === $data ) ? false : '' !== trim( $data );
 			} else {
 				return $data;
 			}
@@ -499,7 +499,7 @@ class WP_Filesystem_SSH2 extends WP_Filesystem_Base {
 	 * @return bool True on success, false on failure.
 	 */
 	public function delete( $file, $recursive = false, $type = false ) {
-		if ( 'f' == $type || $this->is_file( $file ) ) {
+		if ( 'f' === $type || $this->is_file( $file ) ) {
 			return ssh2_sftp_unlink( $this->sftp_link, $file );
 		}
 		if ( ! $recursive ) {
@@ -725,11 +725,11 @@ class WP_Filesystem_SSH2 extends WP_Filesystem_Base {
 			$struc         = array();
 			$struc['name'] = $entry;
 
-			if ( '.' == $struc['name'] || '..' == $struc['name'] ) {
+			if ( '.' === $struc['name'] || '..' === $struc['name'] ) {
 				continue; // Do not care about these folders.
 			}
 
-			if ( ! $include_hidden && '.' == $struc['name'][0] ) {
+			if ( ! $include_hidden && '.' === $struc['name'][0] ) {
 				continue;
 			}
 
@@ -748,7 +748,7 @@ class WP_Filesystem_SSH2 extends WP_Filesystem_Base {
 			$struc['time']        = gmdate( 'h:i:s', $struc['lastmodunix'] );
 			$struc['type']        = $this->is_dir( $path . '/' . $entry ) ? 'd' : 'f';
 
-			if ( 'd' == $struc['type'] ) {
+			if ( 'd' === $struc['type'] ) {
 				if ( $recursive ) {
 					$struc['files'] = $this->dirlist( $path . '/' . $struc['name'], $include_hidden, $recursive );
 				} else {
diff --git a/wp-admin/includes/class-wp-ms-themes-list-table.php b/wp-admin/includes/class-wp-ms-themes-list-table.php
index 03441acbe6..169f783ec8 100644
--- a/wp-admin/includes/class-wp-ms-themes-list-table.php
+++ b/wp-admin/includes/class-wp-ms-themes-list-table.php
@@ -352,7 +352,7 @@ class WP_MS_Themes_List_Table extends WP_List_Table {
 				$url = 'themes.php';
 			}
 
-			if ( 'search' != $type ) {
+			if ( 'search' !== $type ) {
 				$status_links[ $type ] = sprintf(
 					"<a href='%s'%s>%s</a>",
 					esc_url( add_query_arg( 'theme_status', $type, $url ) ),
@@ -374,10 +374,10 @@ class WP_MS_Themes_List_Table extends WP_List_Table {
 		global $status;
 
 		$actions = array();
-		if ( 'enabled' != $status ) {
+		if ( 'enabled' !== $status ) {
 			$actions['enable-selected'] = $this->is_site_themes ? __( 'Enable' ) : __( 'Network Enable' );
 		}
-		if ( 'disabled' != $status ) {
+		if ( 'disabled' !== $status ) {
 			$actions['disable-selected'] = $this->is_site_themes ? __( 'Disable' ) : __( 'Network Disable' );
 		}
 		if ( ! $this->is_site_themes ) {
diff --git a/wp-admin/includes/class-wp-plugins-list-table.php b/wp-admin/includes/class-wp-plugins-list-table.php
index 9334f86347..b67d75c4b0 100644
--- a/wp-admin/includes/class-wp-plugins-list-table.php
+++ b/wp-admin/includes/class-wp-plugins-list-table.php
@@ -517,11 +517,11 @@ class WP_Plugins_List_Table extends WP_List_Table {
 
 		$actions = array();
 
-		if ( 'active' != $status ) {
+		if ( 'active' !== $status ) {
 			$actions['activate-selected'] = $this->screen->in_admin( 'network' ) ? __( 'Network Activate' ) : __( 'Activate' );
 		}
 
-		if ( 'inactive' != $status && 'recent' != $status ) {
+		if ( 'inactive' !== $status && 'recent' !== $status ) {
 			$actions['deactivate-selected'] = $this->screen->in_admin( 'network' ) ? __( 'Network Deactivate' ) : __( 'Deactivate' );
 		}
 
@@ -530,7 +530,7 @@ class WP_Plugins_List_Table extends WP_List_Table {
 				$actions['update-selected'] = __( 'Update' );
 			}
 
-			if ( current_user_can( 'delete_plugins' ) && ( 'active' != $status ) ) {
+			if ( current_user_can( 'delete_plugins' ) && ( 'active' !== $status ) ) {
 				$actions['delete-selected'] = __( 'Delete' );
 			}
 		}
@@ -565,7 +565,7 @@ class WP_Plugins_List_Table extends WP_List_Table {
 
 		echo '<div class="alignleft actions">';
 
-		if ( 'recently_activated' == $status ) {
+		if ( 'recently_activated' === $status ) {
 			submit_button( __( 'Clear List' ), '', 'clear-recent-list', false );
 		} elseif ( 'top' === $which && 'mustuse' === $status ) {
 			echo '<p>' . sprintf(
@@ -858,7 +858,7 @@ class WP_Plugins_List_Table extends WP_List_Table {
 				esc_attr( $plugin_file )
 			);
 		}
-		if ( 'dropins' != $context ) {
+		if ( 'dropins' !== $context ) {
 			$description = '<p>' . ( $plugin_data['Description'] ? $plugin_data['Description'] : '&nbsp;' ) . '</p>';
 			$plugin_name = $plugin_data['Name'];
 		}
diff --git a/wp-admin/includes/class-wp-posts-list-table.php b/wp-admin/includes/class-wp-posts-list-table.php
index 871feeb84e..3b29dce7d2 100644
--- a/wp-admin/includes/class-wp-posts-list-table.php
+++ b/wp-admin/includes/class-wp-posts-list-table.php
@@ -1190,7 +1190,7 @@ class WP_Posts_List_Table extends WP_List_Table {
 				$term_links = array();
 				foreach ( $terms as $t ) {
 					$posts_in_term_qv = array();
-					if ( 'post' != $post->post_type ) {
+					if ( 'post' !== $post->post_type ) {
 						$posts_in_term_qv['post_type'] = $post->post_type;
 					}
 					if ( $taxonomy_object->query_var ) {
@@ -1335,7 +1335,7 @@ class WP_Posts_List_Table extends WP_List_Table {
 		$actions          = array();
 		$title            = _draft_or_post_title();
 
-		if ( $can_edit_post && 'trash' != $post->post_status ) {
+		if ( $can_edit_post && 'trash' !== $post->post_status ) {
 			$actions['edit'] = sprintf(
 				'<a href="%s" aria-label="%s">%s</a>',
 				get_edit_post_link( $post->ID ),
@@ -1395,7 +1395,7 @@ class WP_Posts_List_Table extends WP_List_Table {
 						__( 'Preview' )
 					);
 				}
-			} elseif ( 'trash' != $post->post_status ) {
+			} elseif ( 'trash' !== $post->post_status ) {
 				$actions['view'] = sprintf(
 					'<a href="%s" rel="bookmark" aria-label="%s">%s</a>',
 					get_permalink( $post->ID ),
diff --git a/wp-admin/includes/class-wp-site-health-auto-updates.php b/wp-admin/includes/class-wp-site-health-auto-updates.php
index f69f9540c2..b67d509a25 100644
--- a/wp-admin/includes/class-wp-site-health-auto-updates.php
+++ b/wp-admin/includes/class-wp-site-health-auto-updates.php
@@ -347,7 +347,7 @@ class WP_Site_Health_Auto_Updates {
 
 		WP_Filesystem();
 
-		if ( 'direct' != $wp_filesystem->method ) {
+		if ( 'direct' !== $wp_filesystem->method ) {
 			return false;
 		}
 
@@ -378,7 +378,7 @@ class WP_Site_Health_Auto_Updates {
 
 		$unwritable_files = array();
 		foreach ( array_keys( $checksums ) as $file ) {
-			if ( 'wp-content' == substr( $file, 0, 10 ) ) {
+			if ( 'wp-content' === substr( $file, 0, 10 ) ) {
 				continue;
 			}
 			if ( ! file_exists( ABSPATH . $file ) ) {
diff --git a/wp-admin/includes/class-wp-terms-list-table.php b/wp-admin/includes/class-wp-terms-list-table.php
index 4808793577..24cdaf2b14 100644
--- a/wp-admin/includes/class-wp-terms-list-table.php
+++ b/wp-admin/includes/class-wp-terms-list-table.php
@@ -576,7 +576,7 @@ class WP_Terms_List_Table extends WP_List_Table {
 			);
 		}
 
-		if ( 'post' != $this->screen->post_type ) {
+		if ( 'post' !== $this->screen->post_type ) {
 			$args['post_type'] = $this->screen->post_type;
 		}
 
diff --git a/wp-admin/includes/class-wp-upgrader.php b/wp-admin/includes/class-wp-upgrader.php
index fb1bd4722c..902b160de3 100644
--- a/wp-admin/includes/class-wp-upgrader.php
+++ b/wp-admin/includes/class-wp-upgrader.php
@@ -331,7 +331,7 @@ class WP_Upgrader {
 
 		if ( is_wp_error( $result ) ) {
 			$wp_filesystem->delete( $working_dir, true );
-			if ( 'incompatible_archive' == $result->get_error_code() ) {
+			if ( 'incompatible_archive' === $result->get_error_code() ) {
 				return new WP_Error( 'incompatible_archive', $this->strings['incompatible_archive'], $result->get_error_data() );
 			}
 			return $result;
@@ -398,7 +398,7 @@ class WP_Upgrader {
 		foreach ( $files as $filename => $file_details ) {
 			if ( ! $wp_filesystem->is_writable( $remote_destination . $filename ) ) {
 				// Attempt to alter permissions to allow writes and try again.
-				$wp_filesystem->chmod( $remote_destination . $filename, ( 'd' == $file_details['type'] ? FS_CHMOD_DIR : FS_CHMOD_FILE ) );
+				$wp_filesystem->chmod( $remote_destination . $filename, ( 'd' === $file_details['type'] ? FS_CHMOD_DIR : FS_CHMOD_FILE ) );
 				if ( ! $wp_filesystem->is_writable( $remote_destination . $filename ) ) {
 					$unwritable_files[] = $filename;
 				}
@@ -603,7 +603,7 @@ class WP_Upgrader {
 		}
 
 		$destination_name = basename( str_replace( $local_destination, '', $destination ) );
-		if ( '.' == $destination_name ) {
+		if ( '.' === $destination_name ) {
 			$destination_name = '';
 		}
 
@@ -744,7 +744,7 @@ class WP_Upgrader {
 		if ( is_wp_error( $download ) && $download->get_error_data( 'softfail-filename' ) ) {
 
 			// Don't output the 'no signature could be found' failure message for now.
-			if ( 'signature_verification_no_signature' != $download->get_error_code() || WP_DEBUG ) {
+			if ( 'signature_verification_no_signature' !== $download->get_error_code() || WP_DEBUG ) {
 				// Output the failure error as a normal feedback, and not as an error.
 				$this->skin->feedback( $download->get_error_message() );
 
diff --git a/wp-admin/includes/comment.php b/wp-admin/includes/comment.php
index 9683c72883..4571cd4b76 100644
--- a/wp-admin/includes/comment.php
+++ b/wp-admin/includes/comment.php
@@ -197,7 +197,7 @@ function floated_admin_avatar( $name ) {
  * @since 2.7.0
  */
 function enqueue_comment_hotkeys_js() {
-	if ( 'true' == get_user_option( 'comment_shortcuts' ) ) {
+	if ( 'true' === get_user_option( 'comment_shortcuts' ) ) {
 		wp_enqueue_script( 'jquery-table-hotkeys' );
 	}
 }
diff --git a/wp-admin/includes/dashboard.php b/wp-admin/includes/dashboard.php
index c7edaf6c08..e17ca73251 100644
--- a/wp-admin/includes/dashboard.php
+++ b/wp-admin/includes/dashboard.php
@@ -137,7 +137,7 @@ function wp_dashboard_setup() {
 		wp_add_dashboard_widget( $widget_id, $name, $wp_registered_widgets[ $widget_id ]['callback'], $wp_registered_widget_controls[ $widget_id ]['callback'] );
 	}
 
-	if ( 'POST' == $_SERVER['REQUEST_METHOD'] && isset( $_POST['widget_id'] ) ) {
+	if ( 'POST' === $_SERVER['REQUEST_METHOD'] && isset( $_POST['widget_id'] ) ) {
 		check_admin_referer( 'edit-dashboard-widget_' . $_POST['widget_id'], 'dashboard-widget-nonce' );
 		ob_start(); // Hack - but the same hack wp-admin/widgets.php uses.
 		wp_dashboard_trigger_widget_control( $_POST['widget_id'] );
@@ -282,7 +282,7 @@ function wp_dashboard_right_now() {
 	foreach ( array( 'post', 'page' ) as $post_type ) {
 		$num_posts = wp_count_posts( $post_type );
 		if ( $num_posts && $num_posts->publish ) {
-			if ( 'post' == $post_type ) {
+			if ( 'post' === $post_type ) {
 				/* translators: %s: Number of posts. */
 				$text = _n( '%s Post', '%s Posts', $num_posts->publish );
 			} else {
@@ -758,16 +758,22 @@ function _wp_dashboard_recent_comments_row( &$comment, $show_date = true ) {
 		$i = 0;
 		foreach ( $actions as $action => $link ) {
 			++$i;
-			( ( ( 'approve' == $action || 'unapprove' == $action ) && 2 === $i ) || 1 === $i ) ? $sep = '' : $sep = ' | ';
+
+			if ( ( ( 'approve' === $action || 'unapprove' === $action ) && 2 === $i ) || 1 === $i ) {
+				$sep = '';
+			} else {
+				$sep = ' | ';
+			}
 
 			// Reply and quickedit need a hide-if-no-js span.
-			if ( 'reply' == $action || 'quickedit' == $action ) {
+			if ( 'reply' === $action || 'quickedit' === $action ) {
 				$action .= ' hide-if-no-js';
 			}
 
 			if ( 'view' === $action && '1' !== $comment->comment_approved ) {
 				$action .= ' hidden';
 			}
+
 			$actions_string .= "<span class='$action'>$sep$link</span>";
 		}
 	}
@@ -784,7 +790,7 @@ function _wp_dashboard_recent_comments_row( &$comment, $show_date = true ) {
 			}
 			?>
 
-			<?php if ( ! $comment->comment_type || 'comment' == $comment->comment_type ) : ?>
+			<?php if ( ! $comment->comment_type || 'comment' === $comment->comment_type ) : ?>
 
 			<div class="dashboard-comment-wrap has-row-actions <?php echo $comment_row_class; ?>">
 			<p class="comment-meta">
@@ -1174,7 +1180,7 @@ function wp_dashboard_rss_control( $widget_id, $form_inputs = array() ) {
 
 	$widget_options[ $widget_id ]['number'] = $number;
 
-	if ( 'POST' == $_SERVER['REQUEST_METHOD'] && isset( $_POST['widget-rss'][ $number ] ) ) {
+	if ( 'POST' === $_SERVER['REQUEST_METHOD'] && isset( $_POST['widget-rss'][ $number ] ) ) {
 		$_POST['widget-rss'][ $number ]         = wp_unslash( $_POST['widget-rss'][ $number ] );
 		$widget_options[ $widget_id ]           = wp_widget_rss_process( $_POST['widget-rss'][ $number ] );
 		$widget_options[ $widget_id ]['number'] = $number;
@@ -1891,10 +1897,10 @@ function wp_welcome_panel() {
 	<div class="welcome-panel-column">
 		<h3><?php _e( 'Next Steps' ); ?></h3>
 		<ul>
-		<?php if ( 'page' == get_option( 'show_on_front' ) && ! get_option( 'page_for_posts' ) ) : ?>
+		<?php if ( 'page' === get_option( 'show_on_front' ) && ! get_option( 'page_for_posts' ) ) : ?>
 			<li><?php printf( '<a href="%s" class="welcome-icon welcome-edit-page">' . __( 'Edit your front page' ) . '</a>', get_edit_post_link( get_option( 'page_on_front' ) ) ); ?></li>
 			<li><?php printf( '<a href="%s" class="welcome-icon welcome-add-page">' . __( 'Add additional pages' ) . '</a>', admin_url( 'post-new.php?post_type=page' ) ); ?></li>
-		<?php elseif ( 'page' == get_option( 'show_on_front' ) ) : ?>
+		<?php elseif ( 'page' === get_option( 'show_on_front' ) ) : ?>
 			<li><?php printf( '<a href="%s" class="welcome-icon welcome-edit-page">' . __( 'Edit your front page' ) . '</a>', get_edit_post_link( get_option( 'page_on_front' ) ) ); ?></li>
 			<li><?php printf( '<a href="%s" class="welcome-icon welcome-add-page">' . __( 'Add additional pages' ) . '</a>', admin_url( 'post-new.php?post_type=page' ) ); ?></li>
 			<li><?php printf( '<a href="%s" class="welcome-icon welcome-write-blog">' . __( 'Add a blog post' ) . '</a>', admin_url( 'post-new.php' ) ); ?></li>
diff --git a/wp-admin/includes/export.php b/wp-admin/includes/export.php
index 19b4630072..315785738d 100644
--- a/wp-admin/includes/export.php
+++ b/wp-admin/includes/export.php
@@ -96,7 +96,7 @@ function export_wp( $args = array() ) {
 	header( 'Content-Disposition: attachment; filename=' . $filename );
 	header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ), true );
 
-	if ( 'all' != $args['content'] && post_type_exists( $args['content'] ) ) {
+	if ( 'all' !== $args['content'] && post_type_exists( $args['content'] ) ) {
 		$ptype = get_post_type_object( $args['content'] );
 		if ( ! $ptype->can_export ) {
 			$args['content'] = 'post';
@@ -111,14 +111,14 @@ function export_wp( $args = array() ) {
 		$where = $wpdb->prepare( "{$wpdb->posts}.post_type IN (" . implode( ',', $esses ) . ')', $post_types );
 	}
 
-	if ( $args['status'] && ( 'post' == $args['content'] || 'page' == $args['content'] ) ) {
+	if ( $args['status'] && ( 'post' === $args['content'] || 'page' === $args['content'] ) ) {
 		$where .= $wpdb->prepare( " AND {$wpdb->posts}.post_status = %s", $args['status'] );
 	} else {
 		$where .= " AND {$wpdb->posts}.post_status != 'auto-draft'";
 	}
 
 	$join = '';
-	if ( $args['category'] && 'post' == $args['content'] ) {
+	if ( $args['category'] && 'post' === $args['content'] ) {
 		$term = term_exists( $args['category'], 'category' );
 		if ( $term ) {
 			$join   = "INNER JOIN {$wpdb->term_relationships} ON ({$wpdb->posts}.ID = {$wpdb->term_relationships}.object_id)";
@@ -126,7 +126,7 @@ function export_wp( $args = array() ) {
 		}
 	}
 
-	if ( 'post' == $args['content'] || 'page' == $args['content'] || 'attachment' == $args['content'] ) {
+	if ( in_array( $args['content'], array( 'post', 'page', 'attachment' ), true ) ) {
 		if ( $args['author'] ) {
 			$where .= $wpdb->prepare( " AND {$wpdb->posts}.post_author = %d", $args['author'] );
 		}
@@ -154,7 +154,7 @@ function export_wp( $args = array() ) {
 		$cat  = get_term( $term['term_id'], 'category' );
 		$cats = array( $cat->term_id => $cat );
 		unset( $term, $cat );
-	} elseif ( 'all' == $args['content'] ) {
+	} elseif ( 'all' === $args['content'] ) {
 		$categories = (array) get_categories( array( 'get' => 'all' ) );
 		$tags       = (array) get_tags( array( 'get' => 'all' ) );
 
@@ -428,7 +428,7 @@ function export_wp( $args = array() ) {
 	 * @return bool
 	 */
 	function wxr_filter_postmeta( $return_me, $meta_key ) {
-		if ( '_edit_lock' == $meta_key ) {
+		if ( '_edit_lock' === $meta_key ) {
 			$return_me = true;
 		}
 		return $return_me;
@@ -513,7 +513,7 @@ function export_wp( $args = array() ) {
 	</wp:term>
 	<?php endforeach; ?>
 	<?php
-	if ( 'all' == $args['content'] ) {
+	if ( 'all' === $args['content'] ) {
 		wxr_nav_menu_terms();}
 	?>
 
diff --git a/wp-admin/includes/file.php b/wp-admin/includes/file.php
index 9933061321..fb31e5aa6b 100644
--- a/wp-admin/includes/file.php
+++ b/wp-admin/includes/file.php
@@ -648,7 +648,7 @@ function wp_tempnam( $filename = '', $dir = '' ) {
 		$dir = get_temp_dir();
 	}
 
-	if ( empty( $filename ) || '.' == $filename || '/' == $filename || '\\' == $filename ) {
+	if ( empty( $filename ) || in_array( $filename, array( '.', '/', '\\' ), true ) ) {
 		$filename = uniqid();
 	}
 
@@ -1103,7 +1103,8 @@ function download_url( $url, $timeout = 300, $signature_verification = false ) {
 
 			$signature_url = false;
 			$url_path      = parse_url( $url, PHP_URL_PATH );
-			if ( substr( $url_path, -4 ) == '.zip' || substr( $url_path, -7 ) == '.tar.gz' ) {
+
+			if ( '.zip' === substr( $url_path, -4 ) || '.tar.gz' === substr( $url_path, -7 ) ) {
 				$signature_url = str_replace( $url_path, $url_path . '.sig', $url );
 			}
 
@@ -1450,7 +1451,7 @@ function unzip_file( $file, $to ) {
 		if ( true === $result ) {
 			return $result;
 		} elseif ( is_wp_error( $result ) ) {
-			if ( 'incompatible_archive' != $result->get_error_code() ) {
+			if ( 'incompatible_archive' !== $result->get_error_code() ) {
 				return $result;
 			}
 		}
@@ -1562,7 +1563,7 @@ function _unzip_file_ziparchive( $file, $to, $needed_dirs = array() ) {
 			return new WP_Error( 'stat_failed_ziparchive', __( 'Could not retrieve file from archive.' ) );
 		}
 
-		if ( '/' == substr( $info['name'], -1 ) ) { // Directory.
+		if ( '/' === substr( $info['name'], -1 ) ) { // Directory.
 			continue;
 		}
 
@@ -1732,7 +1733,7 @@ function copy_dir( $from, $to, $skip_list = array() ) {
 			continue;
 		}
 
-		if ( 'f' == $fileinfo['type'] ) {
+		if ( 'f' === $fileinfo['type'] ) {
 			if ( ! $wp_filesystem->copy( $from . $filename, $to . $filename, true, FS_CHMOD_FILE ) ) {
 				// If copy failed, chmod file to 0644 and try again.
 				$wp_filesystem->chmod( $to . $filename, FS_CHMOD_FILE );
@@ -1740,7 +1741,7 @@ function copy_dir( $from, $to, $skip_list = array() ) {
 					return new WP_Error( 'copy_failed_copy_dir', __( 'Could not copy file.' ), $to . $filename );
 				}
 			}
-		} elseif ( 'd' == $fileinfo['type'] ) {
+		} elseif ( 'd' === $fileinfo['type'] ) {
 			if ( ! $wp_filesystem->is_dir( $to . $filename ) ) {
 				if ( ! $wp_filesystem->mkdir( $to . $filename, FS_CHMOD_DIR ) ) {
 					return new WP_Error( 'mkdir_failed_copy_dir', __( 'Could not create directory.' ), $to . $filename );
@@ -1761,6 +1762,7 @@ function copy_dir( $from, $to, $skip_list = array() ) {
 			}
 		}
 	}
+
 	return true;
 }
 
@@ -1924,7 +1926,7 @@ function get_filesystem_method( $args = array(), $context = '', $allow_relaxed_f
 		}
 	}
 
-	if ( ! $method && isset( $args['connection_type'] ) && 'ssh' == $args['connection_type'] && extension_loaded( 'ssh2' ) ) {
+	if ( ! $method && isset( $args['connection_type'] ) && 'ssh' === $args['connection_type'] && extension_loaded( 'ssh2' ) ) {
 		$method = 'ssh2';
 	}
 	if ( ! $method && extension_loaded( 'ftp' ) ) {
@@ -2010,7 +2012,7 @@ function request_filesystem_credentials( $form_post, $type = '', $error = false,
 		$type = get_filesystem_method( array(), $context, $allow_relaxed_file_ownership );
 	}
 
-	if ( 'direct' == $type ) {
+	if ( 'direct' === $type ) {
 		return true;
 	}
 
@@ -2061,29 +2063,32 @@ function request_filesystem_credentials( $form_post, $type = '', $error = false,
 		unset( $credentials['port'] );
 	}
 
-	if ( ( defined( 'FTP_SSH' ) && FTP_SSH ) || ( defined( 'FS_METHOD' ) && 'ssh2' == FS_METHOD ) ) {
+	if ( ( defined( 'FTP_SSH' ) && FTP_SSH ) || ( defined( 'FS_METHOD' ) && 'ssh2' === FS_METHOD ) ) {
 		$credentials['connection_type'] = 'ssh';
-	} elseif ( ( defined( 'FTP_SSL' ) && FTP_SSL ) && 'ftpext' == $type ) { // Only the FTP Extension understands SSL.
+	} elseif ( ( defined( 'FTP_SSL' ) && FTP_SSL ) && 'ftpext' === $type ) { // Only the FTP Extension understands SSL.
 		$credentials['connection_type'] = 'ftps';
 	} elseif ( ! empty( $submitted_form['connection_type'] ) ) {
 		$credentials['connection_type'] = $submitted_form['connection_type'];
 	} elseif ( ! isset( $credentials['connection_type'] ) ) { // All else fails (and it's not defaulted to something else saved), default to FTP.
 		$credentials['connection_type'] = 'ftp';
 	}
-	if ( ! $error &&
-			(
-				( ! empty( $credentials['password'] ) && ! empty( $credentials['username'] ) && ! empty( $credentials['hostname'] ) ) ||
-				( 'ssh' == $credentials['connection_type'] && ! empty( $credentials['public_key'] ) && ! empty( $credentials['private_key'] ) )
-			) ) {
+	if ( ! $error
+		&& ( ( ! empty( $credentials['password'] ) && ! empty( $credentials['username'] ) && ! empty( $credentials['hostname'] ) )
+			|| ( 'ssh' === $credentials['connection_type'] && ! empty( $credentials['public_key'] ) && ! empty( $credentials['private_key'] ) )
+		)
+	) {
 		$stored_credentials = $credentials;
+
 		if ( ! empty( $stored_credentials['port'] ) ) { // Save port as part of hostname to simplify above code.
 			$stored_credentials['hostname'] .= ':' . $stored_credentials['port'];
 		}
 
 		unset( $stored_credentials['password'], $stored_credentials['port'], $stored_credentials['private_key'], $stored_credentials['public_key'] );
+
 		if ( ! wp_installing() ) {
 			update_option( 'ftp_credentials', $stored_credentials );
 		}
+
 		return $credentials;
 	}
 	$hostname        = isset( $credentials['hostname'] ) ? $credentials['hostname'] : '';
@@ -2208,7 +2213,7 @@ function request_filesystem_credentials( $form_post, $type = '', $error = false,
 	<?php
 	if ( isset( $types['ssh'] ) ) {
 		$hidden_class = '';
-		if ( 'ssh' != $connection_type || empty( $connection_type ) ) {
+		if ( 'ssh' !== $connection_type || empty( $connection_type ) ) {
 			$hidden_class = ' class="hidden"';
 		}
 		?>
@@ -2251,9 +2256,11 @@ function request_filesystem_credentials( $form_post, $type = '', $error = false,
  */
 function wp_print_request_filesystem_credentials_modal() {
 	$filesystem_method = get_filesystem_method();
+
 	ob_start();
 	$filesystem_credentials_are_stored = request_filesystem_credentials( self_admin_url() );
 	ob_end_clean();
+
 	$request_filesystem_credentials = ( 'direct' !== $filesystem_method && ! $filesystem_credentials_are_stored );
 	if ( ! $request_filesystem_credentials ) {
 		return;
diff --git a/wp-admin/includes/image-edit.php b/wp-admin/includes/image-edit.php
index b48be674f3..701473679e 100644
--- a/wp-admin/includes/image-edit.php
+++ b/wp-admin/includes/image-edit.php
@@ -776,7 +776,7 @@ function wp_save_image( $post_id ) {
 	$fwidth  = ! empty( $_REQUEST['fwidth'] ) ? intval( $_REQUEST['fwidth'] ) : 0;
 	$fheight = ! empty( $_REQUEST['fheight'] ) ? intval( $_REQUEST['fheight'] ) : 0;
 	$target  = ! empty( $_REQUEST['target'] ) ? preg_replace( '/[^a-z0-9_-]+/i', '', $_REQUEST['target'] ) : '';
-	$scale   = ! empty( $_REQUEST['do'] ) && 'scale' == $_REQUEST['do'];
+	$scale   = ! empty( $_REQUEST['do'] ) && 'scale' === $_REQUEST['do'];
 
 	if ( $scale && $fwidth > 0 && $fheight > 0 ) {
 		$size = $img->get_size();
@@ -830,7 +830,7 @@ function wp_save_image( $post_id ) {
 	if ( defined( 'IMAGE_EDIT_OVERWRITE' ) && IMAGE_EDIT_OVERWRITE &&
 		isset( $backup_sizes['full-orig'] ) && $backup_sizes['full-orig']['file'] != $basename ) {
 
-		if ( 'thumbnail' == $target ) {
+		if ( 'thumbnail' === $target ) {
 			$new_path = "{$dirname}/{$filename}-temp.{$ext}";
 		} else {
 			$new_path = $path;
@@ -880,16 +880,16 @@ function wp_save_image( $post_id ) {
 		$meta['width']  = $size['width'];
 		$meta['height'] = $size['height'];
 
-		if ( $success && ( 'nothumb' == $target || 'all' == $target ) ) {
+		if ( $success && ( 'nothumb' === $target || 'all' === $target ) ) {
 			$sizes = get_intermediate_image_sizes();
-			if ( 'nothumb' == $target ) {
+			if ( 'nothumb' === $target ) {
 				$sizes = array_diff( $sizes, array( 'thumbnail' ) );
 			}
 		}
 
 		$return->fw = $meta['width'];
 		$return->fh = $meta['height'];
-	} elseif ( 'thumbnail' == $target ) {
+	} elseif ( 'thumbnail' === $target ) {
 		$sizes   = array( 'thumbnail' );
 		$success = true;
 		$delete  = true;
@@ -958,7 +958,7 @@ function wp_save_image( $post_id ) {
 
 		if ( 'thumbnail' === $target || 'all' === $target || 'full' === $target ) {
 			// Check if it's an image edit from attachment edit screen.
-			if ( ! empty( $_REQUEST['context'] ) && 'edit-attachment' == $_REQUEST['context'] ) {
+			if ( ! empty( $_REQUEST['context'] ) && 'edit-attachment' === $_REQUEST['context'] ) {
 				$thumb_url         = wp_get_attachment_image_src( $post_id, array( 900, 600 ), true );
 				$return->thumbnail = $thumb_url[0];
 			} else {
diff --git a/wp-admin/includes/media.php b/wp-admin/includes/media.php
index fc05bd6f72..feebbd9bff 100644
--- a/wp-admin/includes/media.php
+++ b/wp-admin/includes/media.php
@@ -680,7 +680,7 @@ function get_upload_iframe_src( $type = null, $post_id = null, $tab = null ) {
 
 	$upload_iframe_src = add_query_arg( 'post_id', (int) $post_id, admin_url( 'media-upload.php' ) );
 
-	if ( $type && 'media' != $type ) {
+	if ( $type && 'media' !== $type ) {
 		$upload_iframe_src = add_query_arg( 'type', $type, $upload_iframe_src );
 	}
 
@@ -865,7 +865,7 @@ function wp_media_upload_handler() {
 			$src = "http://$src";
 		}
 
-		if ( isset( $_POST['media_type'] ) && 'image' != $_POST['media_type'] ) {
+		if ( isset( $_POST['media_type'] ) && 'image' !== $_POST['media_type'] ) {
 			$title = esc_html( wp_unslash( $_POST['title'] ) );
 			if ( empty( $title ) ) {
 				$title = esc_html( wp_basename( $src ) );
@@ -880,7 +880,7 @@ function wp_media_upload_handler() {
 
 			if ( $ext ) {
 				$ext_type = wp_ext2type( $ext );
-				if ( 'audio' == $ext_type || 'video' == $ext_type ) {
+				if ( 'audio' === $ext_type || 'video' === $ext_type ) {
 					$type = $ext_type;
 				}
 			}
@@ -1159,7 +1159,7 @@ function image_size_input_fields( $post, $check = '' ) {
 		$checked  = '';
 
 		// Is this size selectable?
-		$enabled = ( $downsize[3] || 'full' == $size );
+		$enabled = ( $downsize[3] || 'full' === $size );
 		$css_id  = "image-size-{$size}-{$post->ID}";
 
 		// If this size is the default but that's not available, don't select it.
@@ -1169,7 +1169,7 @@ function image_size_input_fields( $post, $check = '' ) {
 			} else {
 				$check = '';
 			}
-		} elseif ( ! $check && $enabled && 'thumbnail' != $size ) {
+		} elseif ( ! $check && $enabled && 'thumbnail' !== $size ) {
 			/*
 			 * If $check is not enabled, default to the first available size
 			 * that's bigger than a thumbnail.
@@ -1302,7 +1302,7 @@ function media_post_single_attachment_fields_to_edit( $form_fields, $post ) {
  * @return array Filtered attachment post object.
  */
 function image_attachment_fields_to_save( $post, $attachment ) {
-	if ( substr( $post['post_mime_type'], 0, 5 ) == 'image' ) {
+	if ( 'image' === substr( $post['post_mime_type'], 0, 5 ) ) {
 		if ( strlen( trim( $post['post_title'] ) ) == 0 ) {
 			$attachment_url                           = ( isset( $post['attachment_url'] ) ) ? $post['attachment_url'] : $post['guid'];
 			$post['post_title']                       = preg_replace( '/\.\w+$/', '', wp_basename( $attachment_url ) );
@@ -1326,7 +1326,7 @@ function image_attachment_fields_to_save( $post, $attachment ) {
 function image_media_send_to_editor( $html, $attachment_id, $attachment ) {
 	$post = get_post( $attachment_id );
 
-	if ( substr( $post->post_mime_type, 0, 5 ) == 'image' ) {
+	if ( 'image' === substr( $post->post_mime_type, 0, 5 ) ) {
 		$url   = $attachment['url'];
 		$align = ! empty( $attachment['align'] ) ? $attachment['align'] : 'none';
 		$size  = ! empty( $attachment['image-size'] ) ? $attachment['image-size'] : 'medium';
@@ -1437,7 +1437,7 @@ function get_attachment_fields_to_edit( $post, $errors = null ) {
 	$form_fields = array_merge_recursive( $form_fields, (array) $errors );
 
 	// This was formerly in image_attachment_fields_to_edit().
-	if ( substr( $post->post_mime_type, 0, 5 ) == 'image' ) {
+	if ( 'image' === substr( $post->post_mime_type, 0, 5 ) ) {
 		$alt = get_post_meta( $post->ID, '_wp_attachment_image_alt', true );
 
 		if ( empty( $alt ) ) {
@@ -1610,11 +1610,11 @@ function get_media_item( $attachment_id, $args = null ) {
 	$display_title = ( ! empty( $title ) ) ? $title : $filename; // $title shouldn't ever be empty, but just in case.
 	$display_title = $parsed_args['show_title'] ? "<div class='filename new'><span class='title'>" . wp_html_excerpt( $display_title, 60, '&hellip;' ) . '</span></div>' : '';
 
-	$gallery = ( ( isset( $_REQUEST['tab'] ) && 'gallery' == $_REQUEST['tab'] ) || ( isset( $redir_tab ) && 'gallery' == $redir_tab ) );
+	$gallery = ( ( isset( $_REQUEST['tab'] ) && 'gallery' === $_REQUEST['tab'] ) || ( isset( $redir_tab ) && 'gallery' === $redir_tab ) );
 	$order   = '';
 
 	foreach ( $form_fields as $key => $val ) {
-		if ( 'menu_order' == $key ) {
+		if ( 'menu_order' === $key ) {
 			if ( $gallery ) {
 				$order = "<div class='menu_order'> <input class='menu_order_input' type='text' id='attachments[$attachment_id][menu_order]' name='attachments[$attachment_id][menu_order]' value='" . esc_attr( $val['value'] ) . "' /></div>";
 			} else {
@@ -1725,8 +1725,11 @@ function get_media_item( $attachment_id, $args = null ) {
 		$calling_post_id = $post->post_parent;
 	}
 
-	if ( 'image' == $type && $calling_post_id && current_theme_supports( 'post-thumbnails', get_post_type( $calling_post_id ) )
-		&& post_type_supports( get_post_type( $calling_post_id ), 'thumbnail' ) && get_post_thumbnail_id( $calling_post_id ) != $attachment_id ) {
+	if ( 'image' === $type && $calling_post_id
+		&& current_theme_supports( 'post-thumbnails', get_post_type( $calling_post_id ) )
+		&& post_type_supports( get_post_type( $calling_post_id ), 'thumbnail' )
+		&& get_post_thumbnail_id( $calling_post_id ) != $attachment_id
+	) {
 
 		$calling_post             = get_post( $calling_post_id );
 		$calling_post_type_object = get_post_type_object( $calling_post->post_type );
@@ -1769,7 +1772,7 @@ function get_media_item( $attachment_id, $args = null ) {
 		if ( ! empty( $field[ $field['input'] ] ) ) {
 			$item .= $field[ $field['input'] ];
 		} elseif ( 'textarea' === $field['input'] ) {
-			if ( 'post_content' == $id && user_can_richedit() ) {
+			if ( 'post_content' === $id && user_can_richedit() ) {
 				// Sanitize_post() skips the post_content when user_can_richedit.
 				$field['value'] = htmlspecialchars( $field['value'], ENT_QUOTES );
 			}
@@ -1962,7 +1965,7 @@ function get_compat_media_markup( $attachment_id, $args = null ) {
 		if ( ! empty( $field[ $field['input'] ] ) ) {
 			$item .= $field[ $field['input'] ];
 		} elseif ( 'textarea' === $field['input'] ) {
-			if ( 'post_content' == $id && user_can_richedit() ) {
+			if ( 'post_content' === $id && user_can_richedit() ) {
 				// sanitize_post() skips the post_content when user_can_richedit.
 				$field['value'] = htmlspecialchars( $field['value'], ENT_QUOTES );
 			}
@@ -2383,7 +2386,7 @@ function media_upload_type_url_form( $type = null, $errors = null, $id = null )
 	insert : function() {
 		var t = this, html, f = document.forms[0], cls, title = '', alt = '', caption = '';
 
-		if ( '' == f.src.value || '' == t.width )
+		if ( '' === f.src.value || '' === t.width )
 			return false;
 
 		if ( f.alt.value )
@@ -2890,7 +2893,7 @@ function wp_media_insert_url_form( $default_view = 'image' ) {
 		$default_align = 'none';
 	}
 
-	if ( 'image' == $default_view ) {
+	if ( 'image' === $default_view ) {
 		$view        = 'image-only';
 		$table_class = '';
 	} else {
diff --git a/wp-admin/includes/menu.php b/wp-admin/includes/menu.php
index 4fe351b11e..d3a09a36c3 100644
--- a/wp-admin/includes/menu.php
+++ b/wp-admin/includes/menu.php
@@ -333,7 +333,7 @@ unset( $id, $data, $prev_menu_was_separator );
 // Remove the last menu item if it is a separator.
 $last_menu_key = array_keys( $menu );
 $last_menu_key = array_pop( $last_menu_key );
-if ( ! empty( $menu ) && 'wp-menu-separator' == $menu[ $last_menu_key ][4] ) {
+if ( ! empty( $menu ) && 'wp-menu-separator' === $menu[ $last_menu_key ][4] ) {
 	unset( $menu[ $last_menu_key ] );
 }
 unset( $last_menu_key );
diff --git a/wp-admin/includes/meta-boxes.php b/wp-admin/includes/meta-boxes.php
index 2b4760a6da..3b66b9a0f0 100644
--- a/wp-admin/includes/meta-boxes.php
+++ b/wp-admin/includes/meta-boxes.php
@@ -46,15 +46,15 @@ function post_submit_meta_box( $post, $args = array() ) {
 <div id="minor-publishing-actions">
 <div id="save-action">
 	<?php
-	if ( 'publish' != $post->post_status && 'future' != $post->post_status && 'pending' != $post->post_status ) {
+	if ( ! in_array( $post->post_status, array( 'publish', 'future', 'pending' ), true ) ) {
 		$private_style = '';
-		if ( 'private' == $post->post_status ) {
+		if ( 'private' === $post->post_status ) {
 			$private_style = 'style="display:none"';
 		}
 		?>
 <input <?php echo $private_style; ?> type="submit" name="save" id="save-post" value="<?php esc_attr_e( 'Save Draft' ); ?>" class="button" />
 <span class="spinner"></span>
-<?php } elseif ( 'pending' == $post->post_status && $can_publish ) { ?>
+<?php } elseif ( 'pending' === $post->post_status && $can_publish ) { ?>
 <input type="submit" name="save" id="save-post" value="<?php esc_attr_e( 'Save as Pending' ); ?>" class="button" />
 <span class="spinner"></span>
 <?php } ?>
@@ -63,7 +63,7 @@ function post_submit_meta_box( $post, $args = array() ) {
 <div id="preview-action">
 		<?php
 		$preview_link = esc_url( get_preview_post_link( $post ) );
-		if ( 'publish' == $post->post_status ) {
+		if ( 'publish' === $post->post_status ) {
 			$preview_button_text = __( 'Preview Changes' );
 		} else {
 			$preview_button_text = __( 'Preview' );
@@ -120,27 +120,27 @@ function post_submit_meta_box( $post, $args = array() ) {
 			?>
 </span>
 	<?php
-	if ( 'publish' == $post->post_status || 'private' == $post->post_status || $can_publish ) {
+	if ( 'publish' === $post->post_status || 'private' === $post->post_status || $can_publish ) {
 		$private_style = '';
-		if ( 'private' == $post->post_status ) {
+		if ( 'private' === $post->post_status ) {
 			$private_style = 'style="display:none"';
 		}
 		?>
 <a href="#post_status" <?php echo $private_style; ?> class="edit-post-status hide-if-no-js" role="button"><span aria-hidden="true"><?php _e( 'Edit' ); ?></span> <span class="screen-reader-text"><?php _e( 'Edit status' ); ?></span></a>
 
 <div id="post-status-select" class="hide-if-js">
-<input type="hidden" name="hidden_post_status" id="hidden_post_status" value="<?php echo esc_attr( ( 'auto-draft' == $post->post_status ) ? 'draft' : $post->post_status ); ?>" />
+<input type="hidden" name="hidden_post_status" id="hidden_post_status" value="<?php echo esc_attr( ( 'auto-draft' === $post->post_status ) ? 'draft' : $post->post_status ); ?>" />
 <label for="post_status" class="screen-reader-text"><?php _e( 'Set status' ); ?></label>
 <select name="post_status" id="post_status">
-		<?php if ( 'publish' == $post->post_status ) : ?>
+		<?php if ( 'publish' === $post->post_status ) : ?>
 <option<?php selected( $post->post_status, 'publish' ); ?> value='publish'><?php _e( 'Published' ); ?></option>
-<?php elseif ( 'private' == $post->post_status ) : ?>
+<?php elseif ( 'private' === $post->post_status ) : ?>
 <option<?php selected( $post->post_status, 'private' ); ?> value='publish'><?php _e( 'Privately Published' ); ?></option>
-<?php elseif ( 'future' == $post->post_status ) : ?>
+<?php elseif ( 'future' === $post->post_status ) : ?>
 <option<?php selected( $post->post_status, 'future' ); ?> value='future'><?php _e( 'Scheduled' ); ?></option>
 <?php endif; ?>
 <option<?php selected( $post->post_status, 'pending' ); ?> value='pending'><?php _e( 'Pending Review' ); ?></option>
-		<?php if ( 'auto-draft' == $post->post_status ) : ?>
+		<?php if ( 'auto-draft' === $post->post_status ) : ?>
 <option<?php selected( $post->post_status, 'auto-draft' ); ?> value='draft'><?php _e( 'Draft' ); ?></option>
 <?php else : ?>
 <option<?php selected( $post->post_status, 'draft' ); ?> value='draft'><?php _e( 'Draft' ); ?></option>
@@ -210,13 +210,13 @@ function post_submit_meta_box( $post, $args = array() ) {
 	$time_format = _x( 'H:i', 'publish box time format' );
 
 	if ( 0 != $post->ID ) {
-		if ( 'future' == $post->post_status ) { // Scheduled for publishing at a future date.
+		if ( 'future' === $post->post_status ) { // Scheduled for publishing at a future date.
 			/* translators: Post date information. %s: Date on which the post is currently scheduled to be published. */
 			$stamp = __( 'Scheduled for: %s' );
-		} elseif ( 'publish' == $post->post_status || 'private' == $post->post_status ) { // Already published.
+		} elseif ( 'publish' === $post->post_status || 'private' === $post->post_status ) { // Already published.
 			/* translators: Post date information. %s: Date on which the post was published. */
 			$stamp = __( 'Published on: %s' );
-		} elseif ( '0000-00-00 00:00:00' == $post->post_date_gmt ) { // Draft, 1 or more saves, no date specified.
+		} elseif ( '0000-00-00 00:00:00' === $post->post_date_gmt ) { // Draft, 1 or more saves, no date specified.
 			$stamp = __( 'Publish <b>immediately</b>' );
 		} elseif ( time() < strtotime( $post->post_date_gmt . ' +0000' ) ) { // Draft, 1 or more saves, future date specified.
 			/* translators: Post date information. %s: Date on which the post is to be published. */
@@ -708,7 +708,8 @@ function post_excerpt_meta_box( $post ) {
 function post_trackback_meta_box( $post ) {
 	$form_trackback = '<input type="text" name="trackback_url" id="trackback_url" class="code" value="' .
 		esc_attr( str_replace( "\n", ' ', $post->to_ping ) ) . '" aria-describedby="trackback-url-desc" />';
-	if ( '' != $post->pinged ) {
+
+	if ( '' !== $post->pinged ) {
 		$pings          = '<p>' . __( 'Already pinged:' ) . '</p><ul>';
 		$already_pinged = explode( "\n", trim( $post->pinged ) );
 		foreach ( $already_pinged as $pinged_url ) {
@@ -1002,7 +1003,7 @@ function page_attributes_meta_box( $post ) {
 		 */
 		do_action( 'page_attributes_misc_attributes', $post );
 		?>
-		<?php if ( 'page' == $post->post_type && get_current_screen()->get_help_tabs() ) : ?>
+		<?php if ( 'page' === $post->post_type && get_current_screen()->get_help_tabs() ) : ?>
 <p class="post-attributes-help-text"><?php _e( 'Need help? Use the Help tab above the screen title.' ); ?></p>
 			<?php
 	endif;
@@ -1055,7 +1056,7 @@ function link_submit_meta_box( $link ) {
 	?>
 <div id="delete-action">
 	<?php
-	if ( ! empty( $_GET['action'] ) && 'edit' == $_GET['action'] && current_user_can( 'manage_links' ) ) {
+	if ( ! empty( $_GET['action'] ) && 'edit' === $_GET['action'] && current_user_can( 'manage_links' ) ) {
 		printf(
 			'<a class="submitdelete deletion" href="%s" onclick="return confirm( \'%s\' );">%s</a>',
 			wp_nonce_url( "link.php?action=delete&amp;link_id=$link->link_id", 'delete-bookmark_' . $link->link_id ),
@@ -1182,21 +1183,21 @@ function xfn_check( $class, $value = '', $deprecated = '' ) {
 	$link_rel = isset( $link->link_rel ) ? $link->link_rel : ''; // In PHP 5.3: $link_rel = $link->link_rel ?: '';
 	$rels     = preg_split( '/\s+/', $link_rel );
 
-	if ( '' != $value && in_array( $value, $rels, true ) ) {
+	if ( '' !== $value && in_array( $value, $rels, true ) ) {
 		echo ' checked="checked"';
 	}
 
-	if ( '' == $value ) {
-		if ( 'family' == $class && strpos( $link_rel, 'child' ) === false && strpos( $link_rel, 'parent' ) === false && strpos( $link_rel, 'sibling' ) === false && strpos( $link_rel, 'spouse' ) === false && strpos( $link_rel, 'kin' ) === false ) {
+	if ( '' === $value ) {
+		if ( 'family' === $class && strpos( $link_rel, 'child' ) === false && strpos( $link_rel, 'parent' ) === false && strpos( $link_rel, 'sibling' ) === false && strpos( $link_rel, 'spouse' ) === false && strpos( $link_rel, 'kin' ) === false ) {
 			echo ' checked="checked"';
 		}
-		if ( 'friendship' == $class && strpos( $link_rel, 'friend' ) === false && strpos( $link_rel, 'acquaintance' ) === false && strpos( $link_rel, 'contact' ) === false ) {
+		if ( 'friendship' === $class && strpos( $link_rel, 'friend' ) === false && strpos( $link_rel, 'acquaintance' ) === false && strpos( $link_rel, 'contact' ) === false ) {
 			echo ' checked="checked"';
 		}
-		if ( 'geographical' == $class && strpos( $link_rel, 'co-resident' ) === false && strpos( $link_rel, 'neighbor' ) === false ) {
+		if ( 'geographical' === $class && strpos( $link_rel, 'co-resident' ) === false && strpos( $link_rel, 'neighbor' ) === false ) {
 			echo ' checked="checked"';
 		}
-		if ( 'identity' == $class && in_array( 'me', $rels, true ) ) {
+		if ( 'identity' === $class && in_array( 'me', $rels, true ) ) {
 			echo ' checked="checked"';
 		}
 	}
@@ -1421,7 +1422,7 @@ function register_and_do_post_meta_boxes( $post ) {
 	}
 
 	$publish_callback_args = array( '__back_compat_meta_box' => true );
-	if ( post_type_supports( $post_type, 'revisions' ) && 'auto-draft' != $post->post_status ) {
+	if ( post_type_supports( $post_type, 'revisions' ) && 'auto-draft' !== $post->post_status ) {
 		$revisions = wp_get_post_revisions( $post->ID );
 
 		// We should aim to show the revisions meta box only when there are revisions.
@@ -1436,7 +1437,7 @@ function register_and_do_post_meta_boxes( $post ) {
 		}
 	}
 
-	if ( 'attachment' == $post_type ) {
+	if ( 'attachment' === $post_type ) {
 		wp_enqueue_script( 'image-edit' );
 		wp_enqueue_style( 'imgareaselect' );
 		add_meta_box( 'submitdiv', __( 'Save' ), 'attachment_submit_meta_box', null, 'side', 'core', array( '__back_compat_meta_box' => true ) );
@@ -1543,7 +1544,7 @@ function register_and_do_post_meta_boxes( $post ) {
 		}
 	}
 
-	if ( ! ( 'pending' == get_post_status( $post ) && ! current_user_can( $post_type_object->cap->publish_posts ) ) ) {
+	if ( ! ( 'pending' === get_post_status( $post ) && ! current_user_can( $post_type_object->cap->publish_posts ) ) ) {
 		add_meta_box( 'slugdiv', __( 'Slug' ), 'post_slug_meta_box', null, 'normal', 'core', array( '__back_compat_meta_box' => true ) );
 	}
 
diff --git a/wp-admin/includes/misc.php b/wp-admin/includes/misc.php
index 628ec7bb7b..51fa058393 100644
--- a/wp-admin/includes/misc.php
+++ b/wp-admin/includes/misc.php
@@ -597,7 +597,7 @@ function wp_doc_link_parse( $content ) {
 			continue;
 		}
 
-		if ( T_STRING == $tokens[ $t ][0] && ( '(' == $tokens[ $t + 1 ] || '(' == $tokens[ $t + 2 ] ) ) {
+		if ( T_STRING == $tokens[ $t ][0] && ( '(' === $tokens[ $t + 1 ] || '(' === $tokens[ $t + 2 ] ) ) {
 			// If it's a function or class defined locally, there's not going to be any docs available.
 			if ( ( isset( $tokens[ $t - 2 ][1] ) && in_array( $tokens[ $t - 2 ][1], array( 'function', 'class' ), true ) )
 				|| ( isset( $tokens[ $t - 2 ][0] ) && T_OBJECT_OPERATOR == $tokens[ $t - 1 ][0] )
diff --git a/wp-admin/includes/ms.php b/wp-admin/includes/ms.php
index f683c737ef..aaffbd2266 100644
--- a/wp-admin/includes/ms.php
+++ b/wp-admin/includes/ms.php
@@ -696,7 +696,7 @@ function site_admin_notice() {
 		return false;
 	}
 
-	if ( 'upgrade.php' == $pagenow ) {
+	if ( 'upgrade.php' === $pagenow ) {
 		return;
 	}
 
@@ -873,7 +873,7 @@ function confirm_delete_users( $users ) {
 	<?php
 	$allusers = (array) $_POST['allusers'];
 	foreach ( $allusers as $user_id ) {
-		if ( '' != $user_id && '0' != $user_id ) {
+		if ( '' !== $user_id && '0' != $user_id ) {
 			$delete_user = get_userdata( $user_id );
 
 			if ( ! current_user_can( 'delete_user', $delete_user->ID ) ) {
@@ -935,7 +935,7 @@ function confirm_delete_users( $users ) {
 							}
 						}
 
-						if ( '' == $user_list ) {
+						if ( '' === $user_list ) {
 							$user_list = $admin_out;
 						}
 
diff --git a/wp-admin/includes/nav-menu.php b/wp-admin/includes/nav-menu.php
index 3cd7f53459..b4ba257153 100644
--- a/wp-admin/includes/nav-menu.php
+++ b/wp-admin/includes/nav-menu.php
@@ -31,17 +31,17 @@ function _wp_ajax_menu_quick_search( $request = array() ) {
 		$response_format = 'json';
 	}
 
-	if ( 'markup' == $response_format ) {
+	if ( 'markup' === $response_format ) {
 		$args['walker'] = new Walker_Nav_Menu_Checklist;
 	}
 
-	if ( 'get-post-item' == $type ) {
+	if ( 'get-post-item' === $type ) {
 		if ( post_type_exists( $object_type ) ) {
 			if ( isset( $request['ID'] ) ) {
 				$object_id = (int) $request['ID'];
-				if ( 'markup' == $response_format ) {
+				if ( 'markup' === $response_format ) {
 					echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', array( get_post( $object_id ) ) ), 0, (object) $args );
-				} elseif ( 'json' == $response_format ) {
+				} elseif ( 'json' === $response_format ) {
 					echo wp_json_encode(
 						array(
 							'ID'         => $object_id,
@@ -55,9 +55,9 @@ function _wp_ajax_menu_quick_search( $request = array() ) {
 		} elseif ( taxonomy_exists( $object_type ) ) {
 			if ( isset( $request['ID'] ) ) {
 				$object_id = (int) $request['ID'];
-				if ( 'markup' == $response_format ) {
+				if ( 'markup' === $response_format ) {
 					echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', array( get_term( $object_id, $object_type ) ) ), 0, (object) $args );
-				} elseif ( 'json' == $response_format ) {
+				} elseif ( 'json' === $response_format ) {
 					$post_obj = get_term( $object_id, $object_type );
 					echo wp_json_encode(
 						array(
@@ -71,7 +71,7 @@ function _wp_ajax_menu_quick_search( $request = array() ) {
 			}
 		}
 	} elseif ( preg_match( '/quick-search-(posttype|taxonomy)-([a-zA-Z_-]*\b)/', $type, $matches ) ) {
-		if ( 'posttype' == $matches[1] && get_post_type_object( $matches[2] ) ) {
+		if ( 'posttype' === $matches[1] && get_post_type_object( $matches[2] ) ) {
 			$post_type_obj = _wp_nav_menu_meta_box_object( get_post_type_object( $matches[2] ) );
 			$args          = array_merge(
 				$args,
@@ -93,10 +93,10 @@ function _wp_ajax_menu_quick_search( $request = array() ) {
 			}
 			while ( $search_results_query->have_posts() ) {
 				$post = $search_results_query->next_post();
-				if ( 'markup' == $response_format ) {
+				if ( 'markup' === $response_format ) {
 					$var_by_ref = $post->ID;
 					echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', array( get_post( $var_by_ref ) ) ), 0, (object) $args );
-				} elseif ( 'json' == $response_format ) {
+				} elseif ( 'json' === $response_format ) {
 					echo wp_json_encode(
 						array(
 							'ID'         => $post->ID,
@@ -107,7 +107,7 @@ function _wp_ajax_menu_quick_search( $request = array() ) {
 					echo "\n";
 				}
 			}
-		} elseif ( 'taxonomy' == $matches[1] ) {
+		} elseif ( 'taxonomy' === $matches[1] ) {
 			$terms = get_terms(
 				array(
 					'taxonomy'   => $matches[2],
@@ -120,9 +120,9 @@ function _wp_ajax_menu_quick_search( $request = array() ) {
 				return;
 			}
 			foreach ( (array) $terms as $term ) {
-				if ( 'markup' == $response_format ) {
+				if ( 'markup' === $response_format ) {
 					echo walk_nav_menu_tree( array_map( 'wp_setup_nav_menu_item', array( $term ) ), 0, (object) $args );
-				} elseif ( 'json' == $response_format ) {
+				} elseif ( 'json' === $response_format ) {
 					echo wp_json_encode(
 						array(
 							'ID'         => $term->term_id,
@@ -231,7 +231,7 @@ function wp_nav_menu_post_type_meta_boxes() {
 		if ( $post_type ) {
 			$id = $post_type->name;
 			// Give pages a higher priority.
-			$priority = ( 'page' == $post_type->name ? 'core' : 'default' );
+			$priority = ( 'page' === $post_type->name ? 'core' : 'default' );
 			add_meta_box( "add-post-type-{$id}", $post_type->labels->name, 'wp_nav_menu_item_post_type_meta_box', 'nav-menus', 'side', $priority, $post_type );
 		}
 	}
@@ -368,11 +368,11 @@ function wp_nav_menu_item_post_type_meta_box( $object, $box ) {
 	 * Posts Page and Privacy Policy Page at the top of the list.
 	 */
 	$important_pages = array();
-	if ( 'page' == $post_type_name ) {
+	if ( 'page' === $post_type_name ) {
 		$suppress_page_ids = array();
 
 		// Insert Front Page or custom Home link.
-		$front_page = 'page' == get_option( 'show_on_front' ) ? (int) get_option( 'page_on_front' ) : 0;
+		$front_page = 'page' === get_option( 'show_on_front' ) ? (int) get_option( 'page_on_front' ) : 0;
 
 		$front_page_obj = null;
 		if ( ! empty( $front_page ) ) {
@@ -400,7 +400,7 @@ function wp_nav_menu_item_post_type_meta_box( $object, $box ) {
 		}
 
 		// Insert Posts Page.
-		$posts_page = 'page' == get_option( 'show_on_front' ) ? (int) get_option( 'page_for_posts' ) : 0;
+		$posts_page = 'page' === get_option( 'show_on_front' ) ? (int) get_option( 'page_for_posts' ) : 0;
 
 		if ( ! empty( $posts_page ) ) {
 			$posts_page_obj             = get_post( $posts_page );
@@ -508,24 +508,24 @@ function wp_nav_menu_item_post_type_meta_box( $object, $box ) {
 	?>
 	<div id="posttype-<?php echo $post_type_name; ?>" class="posttypediv">
 		<ul id="posttype-<?php echo $post_type_name; ?>-tabs" class="posttype-tabs add-menu-item-tabs">
-			<li <?php echo ( 'most-recent' == $current_tab ? ' class="tabs"' : '' ); ?>>
+			<li <?php echo ( 'most-recent' === $current_tab ? ' class="tabs"' : '' ); ?>>
 				<a class="nav-tab-link" data-type="tabs-panel-posttype-<?php echo esc_attr( $post_type_name ); ?>-most-recent" href="<?php echo $most_recent_url; ?>#tabs-panel-posttype-<?php echo $post_type_name; ?>-most-recent">
 					<?php _e( 'Most Recent' ); ?>
 				</a>
 			</li>
-			<li <?php echo ( 'all' == $current_tab ? ' class="tabs"' : '' ); ?>>
+			<li <?php echo ( 'all' === $current_tab ? ' class="tabs"' : '' ); ?>>
 				<a class="nav-tab-link" data-type="<?php echo esc_attr( $post_type_name ); ?>-all" href="<?php echo $view_all_url; ?>#<?php echo $post_type_name; ?>-all">
 					<?php _e( 'View All' ); ?>
 				</a>
 			</li>
-			<li <?php echo ( 'search' == $current_tab ? ' class="tabs"' : '' ); ?>>
+			<li <?php echo ( 'search' === $current_tab ? ' class="tabs"' : '' ); ?>>
 				<a class="nav-tab-link" data-type="tabs-panel-posttype-<?php echo esc_attr( $post_type_name ); ?>-search" href="<?php echo $search_url; ?>#tabs-panel-posttype-<?php echo $post_type_name; ?>-search">
 					<?php _e( 'Search' ); ?>
 				</a>
 			</li>
 		</ul><!-- .posttype-tabs -->
 
-		<div id="tabs-panel-posttype-<?php echo $post_type_name; ?>-most-recent" class="tabs-panel <?php echo ( 'most-recent' == $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?>" role="region" aria-label="<?php _e( 'Most Recent' ); ?>" tabindex="0">
+		<div id="tabs-panel-posttype-<?php echo $post_type_name; ?>-most-recent" class="tabs-panel <?php echo ( 'most-recent' === $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?>" role="region" aria-label="<?php _e( 'Most Recent' ); ?>" tabindex="0">
 			<ul id="<?php echo $post_type_name; ?>checklist-most-recent" class="categorychecklist form-no-clear">
 				<?php
 				$recent_args    = array_merge(
@@ -560,7 +560,7 @@ function wp_nav_menu_item_post_type_meta_box( $object, $box ) {
 			</ul>
 		</div><!-- /.tabs-panel -->
 
-		<div class="tabs-panel <?php echo ( 'search' == $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?>" id="tabs-panel-posttype-<?php echo $post_type_name; ?>-search" role="region" aria-label="<?php echo $post_type->labels->search_items; ?>" tabindex="0">
+		<div class="tabs-panel <?php echo ( 'search' === $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?>" id="tabs-panel-posttype-<?php echo $post_type_name; ?>-search" role="region" aria-label="<?php echo $post_type->labels->search_items; ?>" tabindex="0">
 			<?php
 			if ( isset( $_REQUEST[ 'quick-search-posttype-' . $post_type_name ] ) ) {
 				$searched       = esc_attr( $_REQUEST[ 'quick-search-posttype-' . $post_type_name ] );
@@ -598,7 +598,7 @@ function wp_nav_menu_item_post_type_meta_box( $object, $box ) {
 			</ul>
 		</div><!-- /.tabs-panel -->
 
-		<div id="<?php echo $post_type_name; ?>-all" class="tabs-panel tabs-panel-view-all <?php echo ( 'all' == $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?>" role="region" aria-label="<?php echo $post_type->labels->all_items; ?>" tabindex="0">
+		<div id="<?php echo $post_type_name; ?>-all" class="tabs-panel tabs-panel-view-all <?php echo ( 'all' === $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?>" role="region" aria-label="<?php echo $post_type->labels->all_items; ?>" tabindex="0">
 			<?php if ( ! empty( $page_links ) ) : ?>
 				<div class="add-menu-item-pagelinks">
 					<?php echo $page_links; ?>
@@ -795,24 +795,24 @@ function wp_nav_menu_item_taxonomy_meta_box( $object, $box ) {
 	?>
 	<div id="taxonomy-<?php echo $taxonomy_name; ?>" class="taxonomydiv">
 		<ul id="taxonomy-<?php echo $taxonomy_name; ?>-tabs" class="taxonomy-tabs add-menu-item-tabs">
-			<li <?php echo ( 'most-used' == $current_tab ? ' class="tabs"' : '' ); ?>>
+			<li <?php echo ( 'most-used' === $current_tab ? ' class="tabs"' : '' ); ?>>
 				<a class="nav-tab-link" data-type="tabs-panel-<?php echo esc_attr( $taxonomy_name ); ?>-pop" href="<?php echo $most_used_url; ?>#tabs-panel-<?php echo $taxonomy_name; ?>-pop">
 					<?php echo esc_html( $taxonomy->labels->most_used ); ?>
 				</a>
 			</li>
-			<li <?php echo ( 'all' == $current_tab ? ' class="tabs"' : '' ); ?>>
+			<li <?php echo ( 'all' === $current_tab ? ' class="tabs"' : '' ); ?>>
 				<a class="nav-tab-link" data-type="tabs-panel-<?php echo esc_attr( $taxonomy_name ); ?>-all" href="<?php echo $view_all_url; ?>#tabs-panel-<?php echo $taxonomy_name; ?>-all">
 					<?php _e( 'View All' ); ?>
 				</a>
 			</li>
-			<li <?php echo ( 'search' == $current_tab ? ' class="tabs"' : '' ); ?>>
+			<li <?php echo ( 'search' === $current_tab ? ' class="tabs"' : '' ); ?>>
 				<a class="nav-tab-link" data-type="tabs-panel-search-taxonomy-<?php echo esc_attr( $taxonomy_name ); ?>" href="<?php echo $search_url; ?>#tabs-panel-search-taxonomy-<?php echo $taxonomy_name; ?>">
 					<?php _e( 'Search' ); ?>
 				</a>
 			</li>
 		</ul><!-- .taxonomy-tabs -->
 
-		<div id="tabs-panel-<?php echo $taxonomy_name; ?>-pop" class="tabs-panel <?php echo ( 'most-used' == $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?>" role="region" aria-label="<?php echo $taxonomy->labels->most_used; ?>" tabindex="0">
+		<div id="tabs-panel-<?php echo $taxonomy_name; ?>-pop" class="tabs-panel <?php echo ( 'most-used' === $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?>" role="region" aria-label="<?php echo $taxonomy->labels->most_used; ?>" tabindex="0">
 			<ul id="<?php echo $taxonomy_name; ?>checklist-pop" class="categorychecklist form-no-clear" >
 				<?php
 				$popular_terms  = get_terms(
@@ -830,7 +830,7 @@ function wp_nav_menu_item_taxonomy_meta_box( $object, $box ) {
 			</ul>
 		</div><!-- /.tabs-panel -->
 
-		<div id="tabs-panel-<?php echo $taxonomy_name; ?>-all" class="tabs-panel tabs-panel-view-all <?php echo ( 'all' == $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?>" role="region" aria-label="<?php echo $taxonomy->labels->all_items; ?>" tabindex="0">
+		<div id="tabs-panel-<?php echo $taxonomy_name; ?>-all" class="tabs-panel tabs-panel-view-all <?php echo ( 'all' === $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?>" role="region" aria-label="<?php echo $taxonomy->labels->all_items; ?>" tabindex="0">
 			<?php if ( ! empty( $page_links ) ) : ?>
 				<div class="add-menu-item-pagelinks">
 					<?php echo $page_links; ?>
@@ -849,7 +849,7 @@ function wp_nav_menu_item_taxonomy_meta_box( $object, $box ) {
 			<?php endif; ?>
 		</div><!-- /.tabs-panel -->
 
-		<div class="tabs-panel <?php echo ( 'search' == $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?>" id="tabs-panel-search-taxonomy-<?php echo $taxonomy_name; ?>" role="region" aria-label="<?php echo $taxonomy->labels->search_items; ?>" tabindex="0">
+		<div class="tabs-panel <?php echo ( 'search' === $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?>" id="tabs-panel-search-taxonomy-<?php echo $taxonomy_name; ?>" role="region" aria-label="<?php echo $taxonomy->labels->search_items; ?>" tabindex="0">
 			<?php
 			if ( isset( $_REQUEST[ 'quick-search-taxonomy-' . $taxonomy_name ] ) ) {
 				$searched       = esc_attr( $_REQUEST[ 'quick-search-taxonomy-' . $taxonomy_name ] );
@@ -931,7 +931,7 @@ function wp_save_nav_menu_items( $menu_id = 0, $menu_data = array() ) {
 					// Or URL is the default.
 					in_array( $_item_object_data['menu-item-url'], array( 'https://', 'http://', '' ), true ) ||
 					// Or it's not a custom menu item (but not the custom home page).
-					! ( 'custom' == $_item_object_data['menu-item-type'] && ! isset( $_item_object_data['menu-item-db-id'] ) ) ||
+					! ( 'custom' === $_item_object_data['menu-item-type'] && ! isset( $_item_object_data['menu-item-db-id'] ) ) ||
 					// Or it *is* a custom menu item that already exists.
 					! empty( $_item_object_data['menu-item-db-id'] )
 				)
@@ -987,20 +987,20 @@ function wp_save_nav_menu_items( $menu_id = 0, $menu_data = array() ) {
 function _wp_nav_menu_meta_box_object( $object = null ) {
 	if ( isset( $object->name ) ) {
 
-		if ( 'page' == $object->name ) {
+		if ( 'page' === $object->name ) {
 			$object->_default_query = array(
 				'orderby'     => 'menu_order title',
 				'post_status' => 'publish',
 			);
 
 			// Posts should show only published items.
-		} elseif ( 'post' == $object->name ) {
+		} elseif ( 'post' === $object->name ) {
 			$object->_default_query = array(
 				'post_status' => 'publish',
 			);
 
 			// Categories should be in reverse chronological order.
-		} elseif ( 'category' == $object->name ) {
+		} elseif ( 'category' === $object->name ) {
 			$object->_default_query = array(
 				'orderby' => 'id',
 				'order'   => 'DESC',
@@ -1066,7 +1066,7 @@ function wp_get_nav_menu_to_edit( $menu_id = 0 ) {
 		$some_pending_menu_items = false;
 		$some_invalid_menu_items = false;
 		foreach ( (array) $menu_items as $menu_item ) {
-			if ( isset( $menu_item->post_status ) && 'draft' == $menu_item->post_status ) {
+			if ( isset( $menu_item->post_status ) && 'draft' === $menu_item->post_status ) {
 				$some_pending_menu_items = true;
 			}
 			if ( ! empty( $menu_item->_invalid ) ) {
@@ -1182,7 +1182,7 @@ function wp_nav_menu_update_menu_items( $nav_menu_selected_id, $nav_menu_selecte
 		foreach ( (array) $_POST['menu-item-db-id'] as $_key => $k ) {
 
 			// Menu item title can't be blank.
-			if ( ! isset( $_POST['menu-item-title'][ $_key ] ) || '' == $_POST['menu-item-title'][ $_key ] ) {
+			if ( ! isset( $_POST['menu-item-title'][ $_key ] ) || '' === $_POST['menu-item-title'][ $_key ] ) {
 				continue;
 			}
 
diff --git a/wp-admin/includes/options.php b/wp-admin/includes/options.php
index 7911abcfba..c7fe3c8779 100644
--- a/wp-admin/includes/options.php
+++ b/wp-admin/includes/options.php
@@ -49,16 +49,17 @@ function options_general_add_js() {
 			$siteName.text( title );
 		});
 
-		$("input[name='date_format']").click(function(){
-			if ( "date_format_custom_radio" != $(this).attr("id") )
+		$( 'input[name="date_format"]' ).click( function() {
+			if ( 'date_format_custom_radio' !== $(this).attr( 'id' ) )
 				$( 'input[name="date_format_custom"]' ).val( $( this ).val() ).closest( 'fieldset' ).find( '.example' ).text( $( this ).parent( 'label' ).children( '.format-i18n' ).text() );
 		});
+
 		$( 'input[name="date_format_custom"]' ).on( 'click input', function() {
 			$( '#date_format_custom_radio' ).prop( 'checked', true );
 		});
 
-		$("input[name='time_format']").click(function(){
-			if ( "time_format_custom_radio" != $(this).attr("id") )
+		$( 'input[name="time_format"]' ).click( function() {
+			if ( 'time_format_custom_radio' !== $(this).attr( 'id' ) )
 				$( 'input[name="time_format_custom"]' ).val( $( this ).val() ).closest( 'fieldset' ).find( '.example' ).text( $( this ).parent( 'label' ).children( '.format-i18n' ).text() );
 		});
 
@@ -80,7 +81,7 @@ function options_general_add_js() {
 					spinner.addClass( 'is-active' );
 
 					$.post( ajaxurl, {
-						action: 'date_format_custom' == format.attr( 'name' ) ? 'date_format' : 'time_format',
+						action: 'date_format_custom' === format.attr( 'name' ) ? 'date_format' : 'time_format',
 						date 	: format.val()
 					}, function( d ) { spinner.removeClass( 'is-active' ); example.text( d ); } );
 				}
diff --git a/wp-admin/includes/plugin-install.php b/wp-admin/includes/plugin-install.php
index 9f90f84cb5..f58f6cb31a 100644
--- a/wp-admin/includes/plugin-install.php
+++ b/wp-admin/includes/plugin-install.php
@@ -107,7 +107,7 @@ function plugins_api( $action, $args = array() ) {
 		$args = (object) $args;
 	}
 
-	if ( 'query_plugins' == $action ) {
+	if ( 'query_plugins' === $action ) {
 		if ( ! isset( $args->per_page ) ) {
 			$args->per_page = 24;
 		}
@@ -462,7 +462,7 @@ function install_plugin_install_status( $api, $loop = false ) {
 		}
 	}
 
-	if ( 'install' == $status ) {
+	if ( 'install' === $status ) {
 		if ( is_dir( WP_PLUGIN_DIR . '/' . $api->slug ) ) {
 			$installed_plugin = get_plugins( '/' . $api->slug );
 			if ( empty( $installed_plugin ) ) {
diff --git a/wp-admin/includes/plugin.php b/wp-admin/includes/plugin.php
index 222dcf8f73..ca3f1fc054 100644
--- a/wp-admin/includes/plugin.php
+++ b/wp-admin/includes/plugin.php
@@ -91,7 +91,7 @@ function get_plugin_data( $plugin_file, $markup = true, $translate = true ) {
 		_deprecated_argument( __FUNCTION__, '3.0.0', sprintf( __( 'The %1$s plugin header is deprecated. Use %2$s instead.' ), '<code>Site Wide Only: true</code>', '<code>Network: true</code>' ) );
 		$plugin_data['Network'] = $plugin_data['_sitewide'];
 	}
-	$plugin_data['Network'] = ( 'true' == strtolower( $plugin_data['Network'] ) );
+	$plugin_data['Network'] = ( 'true' === strtolower( $plugin_data['Network'] ) );
 	unset( $plugin_data['_sitewide'] );
 
 	// If no text domain is defined fall back to the plugin slug.
@@ -156,7 +156,7 @@ function _get_plugin_data_markup_translate( $plugin_file, $plugin_data, $markup
 					load_plugin_textdomain( $textdomain, false, dirname( $plugin_file ) );
 				}
 			}
-		} elseif ( 'hello.php' == basename( $plugin_file ) ) {
+		} elseif ( 'hello.php' === basename( $plugin_file ) ) {
 			$textdomain = 'default';
 		}
 		if ( $textdomain ) {
@@ -295,30 +295,36 @@ function get_plugins( $plugin_folder = '' ) {
 	// Files in wp-content/plugins directory.
 	$plugins_dir  = @ opendir( $plugin_root );
 	$plugin_files = array();
+
 	if ( $plugins_dir ) {
 		while ( ( $file = readdir( $plugins_dir ) ) !== false ) {
-			if ( substr( $file, 0, 1 ) == '.' ) {
+			if ( '.' === substr( $file, 0, 1 ) ) {
 				continue;
 			}
+
 			if ( is_dir( $plugin_root . '/' . $file ) ) {
 				$plugins_subdir = @ opendir( $plugin_root . '/' . $file );
+
 				if ( $plugins_subdir ) {
 					while ( ( $subfile = readdir( $plugins_subdir ) ) !== false ) {
-						if ( substr( $subfile, 0, 1 ) == '.' ) {
+						if ( '.' === substr( $subfile, 0, 1 ) ) {
 							continue;
 						}
-						if ( substr( $subfile, -4 ) == '.php' ) {
+
+						if ( '.php' === substr( $subfile, -4 ) ) {
 							$plugin_files[] = "$file/$subfile";
 						}
 					}
+
 					closedir( $plugins_subdir );
 				}
 			} else {
-				if ( substr( $file, -4 ) == '.php' ) {
+				if ( '.php' === substr( $file, -4 ) ) {
 					$plugin_files[] = $file;
 				}
 			}
 		}
+
 		closedir( $plugins_dir );
 	}
 
@@ -369,7 +375,7 @@ function get_mu_plugins() {
 	$plugins_dir = @opendir( WPMU_PLUGIN_DIR );
 	if ( $plugins_dir ) {
 		while ( ( $file = readdir( $plugins_dir ) ) !== false ) {
-			if ( substr( $file, -4 ) == '.php' ) {
+			if ( '.php' === substr( $file, -4 ) ) {
 				$plugin_files[] = $file;
 			}
 		}
@@ -1444,7 +1450,7 @@ function add_submenu_page( $parent_slug, $page_title, $menu_title, $capability,
 	 * Backward-compatibility for plugins using add_management_page().
 	 * See wp-admin/admin.php for redirect from edit.php to tools.php.
 	 */
-	if ( 'tools.php' == $parent_slug ) {
+	if ( 'tools.php' === $parent_slug ) {
 		$_registered_pages[ get_plugin_page_hookname( $menu_slug, 'edit.php' ) ] = true;
 	}
 
@@ -1836,7 +1842,7 @@ function get_admin_page_parent( $parent = '' ) {
 	global $parent_file, $menu, $submenu, $pagenow, $typenow,
 		$plugin_page, $_wp_real_parent_file, $_wp_menu_nopriv, $_wp_submenu_nopriv;
 
-	if ( ! empty( $parent ) && 'admin.php' != $parent ) {
+	if ( ! empty( $parent ) && 'admin.php' !== $parent ) {
 		if ( isset( $_wp_real_parent_file[ $parent ] ) ) {
 			$parent = $_wp_real_parent_file[ $parent ];
 		}
@@ -2018,7 +2024,7 @@ function get_plugin_page_hookname( $plugin_page, $parent_page ) {
 	$parent = get_admin_page_parent( $parent_page );
 
 	$page_type = 'admin';
-	if ( empty( $parent_page ) || 'admin.php' == $parent_page || isset( $admin_page_hooks[ $plugin_page ] ) ) {
+	if ( empty( $parent_page ) || 'admin.php' === $parent_page || isset( $admin_page_hooks[ $plugin_page ] ) ) {
 		if ( isset( $admin_page_hooks[ $plugin_page ] ) ) {
 			$page_type = 'toplevel';
 		} elseif ( isset( $admin_page_hooks[ $parent ] ) ) {
@@ -2165,7 +2171,7 @@ function option_update_filter( $options ) {
  * @return array
  */
 function add_option_whitelist( $new_options, $options = '' ) {
-	if ( '' == $options ) {
+	if ( '' === $options ) {
 		global $whitelist_options;
 	} else {
 		$whitelist_options = $options;
@@ -2200,7 +2206,7 @@ function add_option_whitelist( $new_options, $options = '' ) {
  * @return array
  */
 function remove_option_whitelist( $del_options, $options = '' ) {
-	if ( '' == $options ) {
+	if ( '' === $options ) {
 		global $whitelist_options;
 	} else {
 		$whitelist_options = $options;
diff --git a/wp-admin/includes/post.php b/wp-admin/includes/post.php
index a554932951..c5bad99766 100644
--- a/wp-admin/includes/post.php
+++ b/wp-admin/includes/post.php
@@ -30,13 +30,13 @@ function _wp_translate_postdata( $update = false, $post_data = null ) {
 	$ptype = get_post_type_object( $post_data['post_type'] );
 
 	if ( $update && ! current_user_can( 'edit_post', $post_data['ID'] ) ) {
-		if ( 'page' == $post_data['post_type'] ) {
+		if ( 'page' === $post_data['post_type'] ) {
 			return new WP_Error( 'edit_others_pages', __( 'Sorry, you are not allowed to edit pages as this user.' ) );
 		} else {
 			return new WP_Error( 'edit_others_posts', __( 'Sorry, you are not allowed to edit posts as this user.' ) );
 		}
 	} elseif ( ! $update && ! current_user_can( $ptype->cap->create_posts ) ) {
-		if ( 'page' == $post_data['post_type'] ) {
+		if ( 'page' === $post_data['post_type'] ) {
 			return new WP_Error( 'edit_others_pages', __( 'Sorry, you are not allowed to create pages as this user.' ) );
 		} else {
 			return new WP_Error( 'edit_others_posts', __( 'Sorry, you are not allowed to create posts as this user.' ) );
@@ -75,13 +75,13 @@ function _wp_translate_postdata( $update = false, $post_data = null ) {
 		&& ! current_user_can( $ptype->cap->edit_others_posts ) ) {
 
 		if ( $update ) {
-			if ( 'page' == $post_data['post_type'] ) {
+			if ( 'page' === $post_data['post_type'] ) {
 				return new WP_Error( 'edit_others_pages', __( 'Sorry, you are not allowed to edit pages as this user.' ) );
 			} else {
 				return new WP_Error( 'edit_others_posts', __( 'Sorry, you are not allowed to edit posts as this user.' ) );
 			}
 		} else {
-			if ( 'page' == $post_data['post_type'] ) {
+			if ( 'page' === $post_data['post_type'] ) {
 				return new WP_Error( 'edit_others_pages', __( 'Sorry, you are not allowed to create pages as this user.' ) );
 			} else {
 				return new WP_Error( 'edit_others_posts', __( 'Sorry, you are not allowed to create posts as this user.' ) );
@@ -103,19 +103,21 @@ function _wp_translate_postdata( $update = false, $post_data = null ) {
 	}
 
 	// What to do based on which button they pressed.
-	if ( isset( $post_data['saveasdraft'] ) && '' != $post_data['saveasdraft'] ) {
+	if ( isset( $post_data['saveasdraft'] ) && '' !== $post_data['saveasdraft'] ) {
 		$post_data['post_status'] = 'draft';
 	}
-	if ( isset( $post_data['saveasprivate'] ) && '' != $post_data['saveasprivate'] ) {
+	if ( isset( $post_data['saveasprivate'] ) && '' !== $post_data['saveasprivate'] ) {
 		$post_data['post_status'] = 'private';
 	}
-	if ( isset( $post_data['publish'] ) && ( '' != $post_data['publish'] ) && ( ! isset( $post_data['post_status'] ) || 'private' !== $post_data['post_status'] ) ) {
+	if ( isset( $post_data['publish'] ) && ( '' !== $post_data['publish'] )
+		&& ( ! isset( $post_data['post_status'] ) || 'private' !== $post_data['post_status'] )
+	) {
 		$post_data['post_status'] = 'publish';
 	}
-	if ( isset( $post_data['advanced'] ) && '' != $post_data['advanced'] ) {
+	if ( isset( $post_data['advanced'] ) && '' !== $post_data['advanced'] ) {
 		$post_data['post_status'] = 'draft';
 	}
-	if ( isset( $post_data['pending'] ) && '' != $post_data['pending'] ) {
+	if ( isset( $post_data['pending'] ) && '' !== $post_data['pending'] ) {
 		$post_data['post_status'] = 'pending';
 	}
 
@@ -126,7 +128,7 @@ function _wp_translate_postdata( $update = false, $post_data = null ) {
 	}
 	$previous_status = $post_id ? get_post_field( 'post_status', $post_id ) : false;
 
-	if ( isset( $post_data['post_status'] ) && 'private' == $post_data['post_status'] && ! current_user_can( $ptype->cap->publish_posts ) ) {
+	if ( isset( $post_data['post_status'] ) && 'private' === $post_data['post_status'] && ! current_user_can( $ptype->cap->publish_posts ) ) {
 		$post_data['post_status'] = $previous_status ? $previous_status : 'pending';
 	}
 
@@ -247,14 +249,14 @@ function edit_post( $post_data = null ) {
 	if ( ! empty( $post_data['post_status'] ) ) {
 		$post_data['post_status'] = sanitize_key( $post_data['post_status'] );
 
-		if ( 'inherit' == $post_data['post_status'] ) {
+		if ( 'inherit' === $post_data['post_status'] ) {
 			unset( $post_data['post_status'] );
 		}
 	}
 
 	$ptype = get_post_type_object( $post_data['post_type'] );
 	if ( ! current_user_can( 'edit_post', $post_ID ) ) {
-		if ( 'page' == $post_data['post_type'] ) {
+		if ( 'page' === $post_data['post_type'] ) {
 			wp_die( __( 'Sorry, you are not allowed to edit this page.' ) );
 		} else {
 			wp_die( __( 'Sorry, you are not allowed to edit this post.' ) );
@@ -376,7 +378,7 @@ function edit_post( $post_data = null ) {
 	}
 
 	// Attachment stuff.
-	if ( 'attachment' == $post_data['post_type'] ) {
+	if ( 'attachment' === $post_data['post_type'] ) {
 		if ( isset( $post_data['_wp_attachment_image_alt'] ) ) {
 			$image_alt = wp_unslash( $post_data['_wp_attachment_image_alt'] );
 
@@ -467,7 +469,7 @@ function bulk_edit_posts( $post_data = null ) {
 	}
 
 	if ( ! current_user_can( $ptype->cap->edit_posts ) ) {
-		if ( 'page' == $ptype->name ) {
+		if ( 'page' === $ptype->name ) {
 			wp_die( __( 'Sorry, you are not allowed to edit pages.' ) );
 		} else {
 			wp_die( __( 'Sorry, you are not allowed to edit posts.' ) );
@@ -485,7 +487,7 @@ function bulk_edit_posts( $post_data = null ) {
 	if ( ! empty( $post_data['post_status'] ) ) {
 		$post_data['post_status'] = sanitize_key( $post_data['post_status'] );
 
-		if ( 'inherit' == $post_data['post_status'] ) {
+		if ( 'inherit' === $post_data['post_status'] ) {
 			unset( $post_data['post_status'] );
 		}
 	}
@@ -508,7 +510,7 @@ function bulk_edit_posts( $post_data = null ) {
 	);
 
 	foreach ( $reset as $field ) {
-		if ( isset( $post_data[ $field ] ) && ( '' == $post_data[ $field ] || -1 == $post_data[ $field ] ) ) {
+		if ( isset( $post_data[ $field ] ) && ( '' === $post_data[ $field ] || -1 == $post_data[ $field ] ) ) {
 			unset( $post_data[ $field ] );
 		}
 	}
@@ -632,7 +634,7 @@ function bulk_edit_posts( $post_data = null ) {
 		$updated[] = wp_update_post( $post_data );
 
 		if ( isset( $post_data['sticky'] ) && current_user_can( $ptype->cap->edit_others_posts ) ) {
-			if ( 'sticky' == $post_data['sticky'] ) {
+			if ( 'sticky' === $post_data['sticky'] ) {
 				stick_post( $post_ID );
 			} else {
 				unstick_post( $post_ID );
@@ -813,7 +815,7 @@ function wp_write_post() {
 	}
 
 	if ( ! current_user_can( $ptype->cap->edit_posts ) ) {
-		if ( 'page' == $ptype->name ) {
+		if ( 'page' === $ptype->name ) {
 			return new WP_Error( 'edit_pages', __( 'Sorry, you are not allowed to create pages on this site.' ) );
 		} else {
 			return new WP_Error( 'edit_posts', __( 'Sorry, you are not allowed to create posts or drafts on this site.' ) );
@@ -912,12 +914,12 @@ function add_meta( $post_ID ) {
 		$metavalue = trim( $metavalue );
 	}
 
-	if ( ( ( '#NONE#' != $metakeyselect ) && ! empty( $metakeyselect ) ) || ! empty( $metakeyinput ) ) {
+	if ( ( ( '#NONE#' !== $metakeyselect ) && ! empty( $metakeyselect ) ) || ! empty( $metakeyinput ) ) {
 		/*
 		 * We have a key/value pair. If both the select and the input
 		 * for the key have data, the input takes precedence.
 		 */
-		if ( '#NONE#' != $metakeyselect ) {
+		if ( '#NONE#' !== $metakeyselect ) {
 			$metakey = $metakeyselect;
 		}
 
@@ -1143,7 +1145,7 @@ function wp_edit_posts_query( $q = false ) {
 
 	if ( isset( $q['order'] ) ) {
 		$order = $q['order'];
-	} elseif ( isset( $q['post_status'] ) && 'pending' == $q['post_status'] ) {
+	} elseif ( isset( $q['post_status'] ) && 'pending' === $q['post_status'] ) {
 		$order = 'ASC';
 	}
 
@@ -1220,8 +1222,8 @@ function wp_edit_attachments_query_vars( $q = false ) {
 		$states .= ',private';
 	}
 
-	$q['post_status'] = isset( $q['status'] ) && 'trash' == $q['status'] ? 'trash' : $states;
-	$q['post_status'] = isset( $q['attachment-filter'] ) && 'trash' == $q['attachment-filter'] ? 'trash' : $states;
+	$q['post_status'] = isset( $q['status'] ) && 'trash' === $q['status'] ? 'trash' : $states;
+	$q['post_status'] = isset( $q['attachment-filter'] ) && 'trash' === $q['attachment-filter'] ? 'trash' : $states;
 
 	$media_per_page = (int) get_user_option( 'upload_per_page' );
 	if ( empty( $media_per_page ) || $media_per_page < 1 ) {
@@ -1243,17 +1245,17 @@ function wp_edit_attachments_query_vars( $q = false ) {
 	}
 
 	foreach ( array_keys( $post_mime_types ) as $type ) {
-		if ( isset( $q['attachment-filter'] ) && "post_mime_type:$type" == $q['attachment-filter'] ) {
+		if ( isset( $q['attachment-filter'] ) && "post_mime_type:$type" === $q['attachment-filter'] ) {
 			$q['post_mime_type'] = $type;
 			break;
 		}
 	}
 
-	if ( isset( $q['detached'] ) || ( isset( $q['attachment-filter'] ) && 'detached' == $q['attachment-filter'] ) ) {
+	if ( isset( $q['detached'] ) || ( isset( $q['attachment-filter'] ) && 'detached' === $q['attachment-filter'] ) ) {
 		$q['post_parent'] = 0;
 	}
 
-	if ( isset( $q['mine'] ) || ( isset( $q['attachment-filter'] ) && 'mine' == $q['attachment-filter'] ) ) {
+	if ( isset( $q['mine'] ) || ( isset( $q['attachment-filter'] ) && 'mine' === $q['attachment-filter'] ) ) {
 		$q['author'] = get_current_user_id();
 	}
 
@@ -1458,7 +1460,9 @@ function get_sample_permalink_html( $id, $new_title = null, $new_slug = null ) {
 		}
 
 		// Encourage a pretty permalink setting.
-		if ( '' == get_option( 'permalink_structure' ) && current_user_can( 'manage_options' ) && ! ( 'page' == get_option( 'show_on_front' ) && get_option( 'page_on_front' ) == $id ) ) {
+		if ( ! get_option( 'permalink_structure' ) && current_user_can( 'manage_options' )
+			&& ! ( 'page' === get_option( 'show_on_front' ) && get_option( 'page_on_front' ) == $id )
+		) {
 			$return .= '<span id="change-permalinks"><a href="options-permalink.php" class="button button-small" target="_blank">' . __( 'Change Permalinks' ) . "</a></span>\n";
 		}
 	} else {
@@ -1682,7 +1686,7 @@ function _admin_notice_post_locked() {
 	} else {
 		$sendback = admin_url( 'edit.php' );
 
-		if ( 'post' != $post->post_type ) {
+		if ( 'post' !== $post->post_type ) {
 			$sendback = add_query_arg( 'post_type', $post->post_type, $sendback );
 		}
 
@@ -1700,7 +1704,7 @@ function _admin_notice_post_locked() {
 	if ( $locked ) {
 		$query_args = array();
 		if ( get_post_type_object( $post->post_type )->public ) {
-			if ( 'publish' == $post->post_status || $user->ID != $post->post_author ) {
+			if ( 'publish' === $post->post_status || $user->ID != $post->post_author ) {
 				// Latest content is in autosave.
 				$nonce                       = wp_create_nonce( 'post_preview_' . $post->ID );
 				$query_args['preview_id']    = $post->ID;
@@ -1888,12 +1892,14 @@ function post_preview() {
 
 	$is_autosave = false;
 
-	if ( ! wp_check_post_lock( $post->ID ) && get_current_user_id() == $post->post_author && ( 'draft' == $post->post_status || 'auto-draft' == $post->post_status ) ) {
+	if ( ! wp_check_post_lock( $post->ID ) && get_current_user_id() == $post->post_author
+		&& ( 'draft' === $post->post_status || 'auto-draft' === $post->post_status )
+	) {
 		$saved_post_id = edit_post();
 	} else {
 		$is_autosave = true;
 
-		if ( isset( $_POST['post_status'] ) && 'auto-draft' == $_POST['post_status'] ) {
+		if ( isset( $_POST['post_status'] ) && 'auto-draft' === $_POST['post_status'] ) {
 			$_POST['post_status'] = 'draft';
 		}
 
@@ -1953,7 +1959,7 @@ function wp_autosave( $post_data ) {
 		return new WP_Error( 'edit_posts', __( 'Sorry, you are not allowed to edit this item.' ) );
 	}
 
-	if ( 'auto-draft' == $post->post_status ) {
+	if ( 'auto-draft' === $post->post_status ) {
 		$post_data['post_status'] = 'draft';
 	}
 
@@ -1961,7 +1967,9 @@ function wp_autosave( $post_data ) {
 		$post_data['post_category'] = explode( ',', $post_data['catslist'] );
 	}
 
-	if ( ! wp_check_post_lock( $post->ID ) && get_current_user_id() == $post->post_author && ( 'auto-draft' == $post->post_status || 'draft' == $post->post_status ) ) {
+	if ( ! wp_check_post_lock( $post->ID ) && get_current_user_id() == $post->post_author
+		&& ( 'auto-draft' === $post->post_status || 'draft' === $post->post_status )
+	) {
 		// Drafts and auto-drafts are just overwritten by autosave for the same user if the post is not locked.
 		return edit_post( wp_slash( $post_data ) );
 	} else {
@@ -1994,7 +2002,7 @@ function redirect_post( $post_id = '' ) {
 					$message = 6;
 			}
 		} else {
-			$message = 'draft' == $status ? 10 : 1;
+			$message = 'draft' === $status ? 10 : 1;
 		}
 
 		$location = add_query_arg( 'message', $message, get_edit_post_link( $post_id, 'url' ) );
diff --git a/wp-admin/includes/schema.php b/wp-admin/includes/schema.php
index 0df44d2456..616c63349c 100644
--- a/wp-admin/includes/schema.php
+++ b/wp-admin/includes/schema.php
@@ -958,10 +958,10 @@ function populate_network( $network_id = 1, $domain = '', $email = '', $site_nam
 	global $wpdb, $current_site, $wp_rewrite;
 
 	$errors = new WP_Error();
-	if ( '' == $domain ) {
+	if ( '' === $domain ) {
 		$errors->add( 'empty_domain', __( 'You must provide a domain name.' ) );
 	}
-	if ( '' == $site_name ) {
+	if ( '' === $site_name ) {
 		$errors->add( 'empty_sitename', __( 'You must provide a name for your network of sites.' ) );
 	}
 
diff --git a/wp-admin/includes/screen.php b/wp-admin/includes/screen.php
index 75cc14a573..345bc8b4f2 100644
--- a/wp-admin/includes/screen.php
+++ b/wp-admin/includes/screen.php
@@ -118,7 +118,7 @@ function meta_box_prefs( $screen ) {
 					continue;
 				}
 				// Submit box cannot be hidden.
-				if ( 'submitdiv' == $box['id'] || 'linksubmitdiv' == $box['id'] ) {
+				if ( 'submitdiv' === $box['id'] || 'linksubmitdiv' === $box['id'] ) {
 					continue;
 				}
 
@@ -161,8 +161,8 @@ function get_hidden_meta_boxes( $screen ) {
 	// Hide slug boxes by default.
 	if ( $use_defaults ) {
 		$hidden = array();
-		if ( 'post' == $screen->base ) {
-			if ( 'post' == $screen->post_type || 'page' == $screen->post_type || 'attachment' == $screen->post_type ) {
+		if ( 'post' === $screen->base ) {
+			if ( in_array( $screen->post_type, array( 'post', 'page', 'attachment' ), true ) ) {
 				$hidden = array( 'slugdiv', 'trackbacksdiv', 'postcustom', 'postexcerpt', 'commentstatusdiv', 'commentsdiv', 'authordiv', 'revisionsdiv' );
 			} else {
 				$hidden = array( 'slugdiv' );
diff --git a/wp-admin/includes/taxonomy.php b/wp-admin/includes/taxonomy.php
index e2877ca565..e711c9658b 100644
--- a/wp-admin/includes/taxonomy.php
+++ b/wp-admin/includes/taxonomy.php
@@ -129,7 +129,7 @@ function wp_insert_category( $catarr, $wp_error = false ) {
 	);
 	$catarr       = wp_parse_args( $catarr, $cat_defaults );
 
-	if ( trim( $catarr['cat_name'] ) == '' ) {
+	if ( '' === trim( $catarr['cat_name'] ) ) {
 		if ( ! $wp_error ) {
 			return 0;
 		} else {
diff --git a/wp-admin/includes/template.php b/wp-admin/includes/template.php
index b0fb03cb18..5641f061a2 100644
--- a/wp-admin/includes/template.php
+++ b/wp-admin/includes/template.php
@@ -2330,7 +2330,7 @@ function compression_test() {
 			}
 
 			if ( 2 == test ) {
-				if ( '"wpCompressionTest' == r )
+				if ( '"wpCompressionTest' === r )
 					this.get('yes');
 				else
 					this.get('no');
diff --git a/wp-admin/includes/theme.php b/wp-admin/includes/theme.php
index 4da4eafb7f..c622be3dfd 100644
--- a/wp-admin/includes/theme.php
+++ b/wp-admin/includes/theme.php
@@ -471,7 +471,7 @@ function themes_api( $action, $args = array() ) {
 		$args = (object) $args;
 	}
 
-	if ( 'query_themes' == $action ) {
+	if ( 'query_themes' === $action ) {
 		if ( ! isset( $args->per_page ) ) {
 			$args->per_page = 24;
 		}
@@ -583,13 +583,13 @@ function themes_api( $action, $args = array() ) {
 		}
 
 		// Back-compat for info/1.2 API, upgrade the theme objects in query_themes to objects.
-		if ( 'query_themes' == $action ) {
+		if ( 'query_themes' === $action ) {
 			foreach ( $res->themes as $i => $theme ) {
 				$res->themes[ $i ] = (object) $theme;
 			}
 		}
 		// Back-compat for info/1.2 API, downgrade the feature_list result back to an array.
-		if ( 'feature_list' == $action ) {
+		if ( 'feature_list' === $action ) {
 			$res = (array) $res;
 		}
 	}
diff --git a/wp-admin/includes/update-core.php b/wp-admin/includes/update-core.php
index 686c75fe45..ac7a734f7c 100644
--- a/wp-admin/includes/update-core.php
+++ b/wp-admin/includes/update-core.php
@@ -1041,7 +1041,7 @@ function update_core( $from, $to ) {
 		}
 		if ( is_array( $checksums ) ) {
 			foreach ( $checksums as $file => $checksum ) {
-				if ( 'wp-content' == substr( $file, 0, 10 ) ) {
+				if ( 'wp-content' === substr( $file, 0, 10 ) ) {
 					continue;
 				}
 				if ( ! file_exists( ABSPATH . $file ) ) {
@@ -1114,7 +1114,7 @@ function update_core( $from, $to ) {
 	$failed = array();
 	if ( isset( $checksums ) && is_array( $checksums ) ) {
 		foreach ( $checksums as $file => $checksum ) {
-			if ( 'wp-content' == substr( $file, 0, 10 ) ) {
+			if ( 'wp-content' === substr( $file, 0, 10 ) ) {
 				continue;
 			}
 			if ( ! file_exists( $working_dir_local . $file ) ) {
@@ -1187,7 +1187,7 @@ function update_core( $from, $to ) {
 	$wp_filesystem->delete( $maintenance_file );
 
 	// 3.5 -> 3.5+ - an empty twentytwelve directory was created upon upgrade to 3.5 for some users, preventing installation of Twenty Twelve.
-	if ( '3.5' == $old_wp_version ) {
+	if ( '3.5' === $old_wp_version ) {
 		if ( is_dir( WP_CONTENT_DIR . '/themes/twentytwelve' ) && ! file_exists( WP_CONTENT_DIR . '/themes/twentytwelve/style.css' ) ) {
 			$wp_filesystem->delete( $wp_filesystem->wp_themes_dir() . 'twentytwelve/' );
 		}
@@ -1203,17 +1203,18 @@ function update_core( $from, $to ) {
 		foreach ( (array) $_new_bundled_files as $file => $introduced_version ) {
 			// If a $development_build or if $introduced version is greater than what the site was previously running.
 			if ( $development_build || version_compare( $introduced_version, $old_wp_version, '>' ) ) {
-				$directory             = ( '/' == $file[ strlen( $file ) - 1 ] );
-				list($type, $filename) = explode( '/', $file, 2 );
+				$directory = ( '/' === $file[ strlen( $file ) - 1 ] );
+
+				list( $type, $filename ) = explode( '/', $file, 2 );
 
 				// Check to see if the bundled items exist before attempting to copy them.
 				if ( ! $wp_filesystem->exists( $from . $distro . 'wp-content/' . $file ) ) {
 					continue;
 				}
 
-				if ( 'plugins' == $type ) {
+				if ( 'plugins' === $type ) {
 					$dest = $wp_filesystem->wp_plugins_dir();
-				} elseif ( 'themes' == $type ) {
+				} elseif ( 'themes' === $type ) {
 					// Back-compat, ::wp_themes_dir() did not return trailingslash'd pre-3.2.
 					$dest = trailingslashit( $wp_filesystem->wp_themes_dir() );
 				} else {
@@ -1343,7 +1344,7 @@ function _copy_dir( $from, $to, $skip_list = array() ) {
 			continue;
 		}
 
-		if ( 'f' == $fileinfo['type'] ) {
+		if ( 'f' === $fileinfo['type'] ) {
 			if ( ! $wp_filesystem->copy( $from . $filename, $to . $filename, true, FS_CHMOD_FILE ) ) {
 				// If copy failed, chmod file to 0644 and try again.
 				$wp_filesystem->chmod( $to . $filename, FS_CHMOD_FILE );
@@ -1351,7 +1352,7 @@ function _copy_dir( $from, $to, $skip_list = array() ) {
 					return new WP_Error( 'copy_failed__copy_dir', __( 'Could not copy file.' ), $to . $filename );
 				}
 			}
-		} elseif ( 'd' == $fileinfo['type'] ) {
+		} elseif ( 'd' === $fileinfo['type'] ) {
 			if ( ! $wp_filesystem->is_dir( $to . $filename ) ) {
 				if ( ! $wp_filesystem->mkdir( $to . $filename, FS_CHMOD_DIR ) ) {
 					return new WP_Error( 'mkdir_failed__copy_dir', __( 'Could not create directory.' ), $to . $filename );
@@ -1399,11 +1400,11 @@ function _redirect_to_about_wordpress( $new_version ) {
 	}
 
 	// Ensure we only run this on the update-core.php page. The Core_Upgrader may be used in other contexts.
-	if ( 'update-core.php' != $pagenow ) {
+	if ( 'update-core.php' !== $pagenow ) {
 		return;
 	}
 
-	if ( 'do-core-upgrade' != $action && 'do-core-reinstall' != $action ) {
+	if ( 'do-core-upgrade' !== $action && 'do-core-reinstall' !== $action ) {
 		return;
 	}
 
diff --git a/wp-admin/includes/update.php b/wp-admin/includes/update.php
index 464ae93d22..085aa00f9e 100644
--- a/wp-admin/includes/update.php
+++ b/wp-admin/includes/update.php
@@ -95,7 +95,7 @@ function find_core_auto_update() {
 	$auto_update = false;
 	$upgrader    = new WP_Automatic_Updater;
 	foreach ( $updates->updates as $update ) {
-		if ( 'autoupdate' != $update->response ) {
+		if ( 'autoupdate' !== $update->response ) {
 			continue;
 		}
 
@@ -285,7 +285,7 @@ function update_nag() {
 
 	global $pagenow;
 
-	if ( 'update-core.php' == $pagenow ) {
+	if ( 'update-core.php' === $pagenow ) {
 		return;
 	}
 
diff --git a/wp-admin/includes/upgrade.php b/wp-admin/includes/upgrade.php
index afc5abc171..be125f913e 100644
--- a/wp-admin/includes/upgrade.php
+++ b/wp-admin/includes/upgrade.php
@@ -862,7 +862,7 @@ function upgrade_100() {
 	$posts = $wpdb->get_results( "SELECT ID, post_title, post_name FROM $wpdb->posts WHERE post_name = ''" );
 	if ( $posts ) {
 		foreach ( $posts as $post ) {
-			if ( '' == $post->post_name ) {
+			if ( '' === $post->post_name ) {
 				$newtitle = sanitize_title( $post->post_title );
 				$wpdb->query( $wpdb->prepare( "UPDATE $wpdb->posts SET post_name = %s WHERE ID = %d", $newtitle, $post->ID ) );
 			}
@@ -871,7 +871,7 @@ function upgrade_100() {
 
 	$categories = $wpdb->get_results( "SELECT cat_ID, cat_name, category_nicename FROM $wpdb->categories" );
 	foreach ( $categories as $category ) {
-		if ( '' == $category->category_nicename ) {
+		if ( '' === $category->category_nicename ) {
 			$newtitle = sanitize_title( $category->cat_name );
 			$wpdb->update( $wpdb->categories, array( 'category_nicename' => $newtitle ), array( 'cat_ID' => $category->cat_ID ) );
 		}
@@ -947,7 +947,7 @@ function upgrade_110() {
 	// Set user_nicename.
 	$users = $wpdb->get_results( "SELECT ID, user_nickname, user_nicename FROM $wpdb->users" );
 	foreach ( $users as $user ) {
-		if ( '' == $user->user_nicename ) {
+		if ( '' === $user->user_nicename ) {
 			$newname = sanitize_title( $user->user_nickname );
 			$wpdb->update( $wpdb->users, array( 'user_nicename' => $newname ), array( 'ID' => $user->ID ) );
 		}
@@ -982,7 +982,7 @@ function upgrade_110() {
 	 * MAX(post_date_gmt) can't be '0000-00-00 00:00:00'.
 	 * <michel_v> I just slapped myself silly for not thinking about it earlier.
 	 */
-	$got_gmt_fields = ! ( $wpdb->get_var( "SELECT MAX(post_date_gmt) FROM $wpdb->posts" ) == '0000-00-00 00:00:00' );
+	$got_gmt_fields = ( '0000-00-00 00:00:00' !== $wpdb->get_var( "SELECT MAX(post_date_gmt) FROM $wpdb->posts" ) );
 
 	if ( ! $got_gmt_fields ) {
 
@@ -1226,10 +1226,10 @@ function upgrade_210() {
 				$status = $post->post_status;
 				$type   = 'post';
 
-				if ( 'static' == $status ) {
+				if ( 'static' === $status ) {
 					$status = 'publish';
 					$type   = 'page';
-				} elseif ( 'attachment' == $status ) {
+				} elseif ( 'attachment' === $status ) {
 					$status = 'inherit';
 					$type   = 'attachment';
 				}
@@ -1357,7 +1357,7 @@ function upgrade_230() {
 		$post_id  = (int) $post->post_id;
 		$term_id  = (int) $post->category_id;
 		$taxonomy = 'category';
-		if ( ! empty( $post->rel_type ) && 'tag' == $post->rel_type ) {
+		if ( ! empty( $post->rel_type ) && 'tag' === $post->rel_type ) {
 			$taxonomy = 'tag';
 		}
 		$tt_id = $tt_ids[ $term_id ][ $taxonomy ];
@@ -1475,7 +1475,7 @@ function upgrade_230() {
 	// Recalculate all counts.
 	$terms = $wpdb->get_results( "SELECT term_taxonomy_id, taxonomy FROM $wpdb->term_taxonomy" );
 	foreach ( (array) $terms as $term ) {
-		if ( ( 'post_tag' == $term->taxonomy ) || ( 'category' == $term->taxonomy ) ) {
+		if ( 'post_tag' === $term->taxonomy || 'category' === $term->taxonomy ) {
 			$count = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships, $wpdb->posts WHERE $wpdb->posts.ID = $wpdb->term_relationships.object_id AND post_status = 'publish' AND post_type = 'post' AND term_taxonomy_id = %d", $term->term_taxonomy_id ) );
 		} else {
 			$count = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $term->term_taxonomy_id ) );
@@ -1815,7 +1815,7 @@ function upgrade_340() {
 	}
 
 	if ( $wp_current_db_version < 20080 ) {
-		if ( 'yes' == $wpdb->get_var( "SELECT autoload FROM $wpdb->options WHERE option_name = 'uninstall_plugins'" ) ) {
+		if ( 'yes' === $wpdb->get_var( "SELECT autoload FROM $wpdb->options WHERE option_name = 'uninstall_plugins'" ) ) {
 			$uninstall_plugins = get_option( 'uninstall_plugins' );
 			delete_option( 'uninstall_plugins' );
 			add_option( 'uninstall_plugins', $uninstall_plugins, null, 'no' );
@@ -2291,7 +2291,7 @@ function upgrade_network() {
 			$upgrade = false;
 			$indexes = $wpdb->get_results( "SHOW INDEXES FROM $wpdb->signups" );
 			foreach ( $indexes as $index ) {
-				if ( 'domain_path' == $index->Key_name && 'domain' == $index->Column_name && 140 != $index->Sub_part ) {
+				if ( 'domain_path' === $index->Key_name && 'domain' === $index->Column_name && 140 != $index->Sub_part ) {
 					$upgrade = true;
 					break;
 				}
@@ -2501,7 +2501,7 @@ function get_alloptions_110() {
 	$options     = $wpdb->get_results( "SELECT option_name, option_value FROM $wpdb->options" );
 	if ( $options ) {
 		foreach ( $options as $option ) {
-			if ( 'siteurl' == $option->option_name || 'home' == $option->option_name || 'category_base' == $option->option_name ) {
+			if ( 'siteurl' === $option->option_name || 'home' === $option->option_name || 'category_base' === $option->option_name ) {
 				$option->option_value = untrailingslashit( $option->option_value );
 			}
 			$all_options->{$option->option_name} = stripslashes( $option->option_value );
@@ -2535,11 +2535,11 @@ function __get_option( $setting ) { // phpcs:ignore WordPress.NamingConventions.
 
 	$option = $wpdb->get_var( $wpdb->prepare( "SELECT option_value FROM $wpdb->options WHERE option_name = %s", $setting ) );
 
-	if ( 'home' === $setting && '' == $option ) {
+	if ( 'home' === $setting && '' === $option ) {
 		return __get_option( 'siteurl' );
 	}
 
-	if ( 'siteurl' === $setting || 'home' === $setting || 'category_base' === $setting || 'tag_base' === $setting ) {
+	if ( in_array( $setting, array( 'siteurl', 'home', 'category_base', 'tag_base' ), true ) ) {
 		$option = untrailingslashit( $option );
 	}
 
@@ -2915,7 +2915,7 @@ function dbDelta( $queries = '', $execute = true ) { // phpcs:ignore WordPress.N
 
 				// For each column in the index.
 				foreach ( $index_data['columns'] as $column_data ) {
-					if ( '' != $index_columns ) {
+					if ( '' !== $index_columns ) {
 						$index_columns .= ',';
 					}
 
@@ -3270,7 +3270,7 @@ function maybe_disable_automattic_widgets() {
 	$plugins = __get_option( 'active_plugins' );
 
 	foreach ( (array) $plugins as $plugin ) {
-		if ( basename( $plugin ) == 'widgets.php' ) {
+		if ( 'widgets.php' === basename( $plugin ) ) {
 			array_splice( $plugins, array_search( $plugin, $plugins, true ), 1 );
 			update_option( 'active_plugins', $plugins );
 			break;
diff --git a/wp-admin/includes/user.php b/wp-admin/includes/user.php
index fc1ca67dcb..2268f75e55 100644
--- a/wp-admin/includes/user.php
+++ b/wp-admin/includes/user.php
@@ -132,7 +132,7 @@ function edit_user( $user_id = 0 ) {
 		$user->show_admin_bar_front = isset( $_POST['admin_bar_front'] ) ? 'true' : 'false';
 	}
 
-	$user->comment_shortcuts = isset( $_POST['comment_shortcuts'] ) && 'true' == $_POST['comment_shortcuts'] ? 'true' : '';
+	$user->comment_shortcuts = isset( $_POST['comment_shortcuts'] ) && 'true' === $_POST['comment_shortcuts'] ? 'true' : '';
 
 	$user->use_ssl = 0;
 	if ( ! empty( $_POST['use_ssl'] ) ) {
@@ -142,7 +142,7 @@ function edit_user( $user_id = 0 ) {
 	$errors = new WP_Error();
 
 	/* checking that username has been typed */
-	if ( '' == $user->user_login ) {
+	if ( '' === $user->user_login ) {
 		$errors->add( 'user_login', __( '<strong>Error</strong>: Please enter a username.' ) );
 	}
 
@@ -474,7 +474,9 @@ function default_password_nag_handler( $errors = false ) {
 	}
 
 	// get_user_setting() = JS-saved UI setting. Else no-js-fallback code.
-	if ( 'hide' == get_user_setting( 'default_password_nag' ) || isset( $_GET['default_password_nag'] ) && '0' == $_GET['default_password_nag'] ) {
+	if ( 'hide' === get_user_setting( 'default_password_nag' )
+		|| isset( $_GET['default_password_nag'] ) && '0' == $_GET['default_password_nag']
+	) {
 		delete_user_setting( 'default_password_nag' );
 		update_user_option( $user_ID, 'default_password_nag', false, true );
 	}
@@ -509,7 +511,7 @@ function default_password_nag_edit_user( $user_ID, $old_data ) {
 function default_password_nag() {
 	global $pagenow;
 	// Short-circuit it.
-	if ( 'profile.php' == $pagenow || ! get_user_option( 'default_password_nag' ) ) {
+	if ( 'profile.php' === $pagenow || ! get_user_option( 'default_password_nag' ) ) {
 		return;
 	}
 
diff --git a/wp-admin/includes/widgets.php b/wp-admin/includes/widgets.php
index f8f16ac79c..d3bdf2032c 100644
--- a/wp-admin/includes/widgets.php
+++ b/wp-admin/includes/widgets.php
@@ -225,7 +225,7 @@ function wp_widget_control( $sidebar_args ) {
 	 * We aren't showing a widget control, we're outputting a template
 	 * for a multi-widget control.
 	 */
-	if ( isset( $sidebar_args['_display'] ) && 'template' == $sidebar_args['_display'] && $widget_number ) {
+	if ( isset( $sidebar_args['_display'] ) && 'template' === $sidebar_args['_display'] && $widget_number ) {
 		// number == -1 implies a template where id numbers are replaced by a generic '__i__'.
 		$control['params'][0]['number'] = -1;
 		// With id_base widget id's are constructed like {$id_base}-{$id_number}.
diff --git a/wp-admin/maint/repair.php b/wp-admin/maint/repair.php
index e6bc2418da..64242ce6f6 100644
--- a/wp-admin/maint/repair.php
+++ b/wp-admin/maint/repair.php
@@ -96,7 +96,7 @@ if ( ! defined( 'WP_ALLOW_REPAIR' ) || ! WP_ALLOW_REPAIR ) {
 		$check = $wpdb->get_row( "CHECK TABLE $table" );
 
 		echo '<p>';
-		if ( 'OK' == $check->Msg_text ) {
+		if ( 'OK' === $check->Msg_text ) {
 			/* translators: %s: Table name. */
 			printf( __( 'The %s table is okay.' ), "<code>$table</code>" );
 		} else {
@@ -106,7 +106,7 @@ if ( ! defined( 'WP_ALLOW_REPAIR' ) || ! WP_ALLOW_REPAIR ) {
 			$repair = $wpdb->get_row( "REPAIR TABLE $table" );
 
 			echo '<br />&nbsp;&nbsp;&nbsp;&nbsp;';
-			if ( 'OK' == $check->Msg_text ) {
+			if ( 'OK' === $check->Msg_text ) {
 				/* translators: %s: Table name. */
 				printf( __( 'Successfully repaired the %s table.' ), "<code>$table</code>" );
 			} else {
@@ -121,14 +121,14 @@ if ( ! defined( 'WP_ALLOW_REPAIR' ) || ! WP_ALLOW_REPAIR ) {
 			$check = $wpdb->get_row( "ANALYZE TABLE $table" );
 
 			echo '<br />&nbsp;&nbsp;&nbsp;&nbsp;';
-			if ( 'Table is already up to date' == $check->Msg_text ) {
+			if ( 'Table is already up to date' === $check->Msg_text ) {
 				/* translators: %s: Table name. */
 				printf( __( 'The %s table is already optimized.' ), "<code>$table</code>" );
 			} else {
 				$check = $wpdb->get_row( "OPTIMIZE TABLE $table" );
 
 				echo '<br />&nbsp;&nbsp;&nbsp;&nbsp;';
-				if ( 'OK' == $check->Msg_text || 'Table is already up to date' == $check->Msg_text ) {
+				if ( 'OK' === $check->Msg_text || 'Table is already up to date' === $check->Msg_text ) {
 					/* translators: %s: Table name. */
 					printf( __( 'Successfully optimized the %s table.' ), "<code>$table</code>" );
 				} else {
@@ -158,7 +158,7 @@ if ( ! defined( 'WP_ALLOW_REPAIR' ) || ! WP_ALLOW_REPAIR ) {
 
 	echo '<h1 class="screen-reader-text">' . __( 'WordPress database repair' ) . '</h1>';
 
-	if ( isset( $_GET['referrer'] ) && 'is_blog_installed' == $_GET['referrer'] ) {
+	if ( isset( $_GET['referrer'] ) && 'is_blog_installed' === $_GET['referrer'] ) {
 		echo '<p>' . __( 'One or more database tables are unavailable. To allow WordPress to attempt to repair these tables, press the &#8220;Repair Database&#8221; button. Repairing can take a while, so please be patient.' ) . '</p>';
 	} else {
 		echo '<p>' . __( 'WordPress can automatically look for some common database problems and repair them. Repairing can take a while, so please be patient.' ) . '</p>';
diff --git a/wp-admin/nav-menus.php b/wp-admin/nav-menus.php
index 6f33cd7321..f1a45022d5 100644
--- a/wp-admin/nav-menus.php
+++ b/wp-admin/nav-menus.php
@@ -421,7 +421,7 @@ $menu_count = count( $nav_menus );
 // Are we on the add new screen?
 $add_new_screen = ( isset( $_GET['menu'] ) && 0 == $_GET['menu'] ) ? true : false;
 
-$locations_screen = ( isset( $_GET['action'] ) && 'locations' == $_GET['action'] ) ? true : false;
+$locations_screen = ( isset( $_GET['action'] ) && 'locations' === $_GET['action'] ) ? true : false;
 
 /*
  * If we have one theme location, and zero menus, we take them right
@@ -470,7 +470,7 @@ if ( empty( $nav_menu_selected_id ) && ! isset( $_GET['menu'] ) && is_nav_menu(
 }
 
 // On deletion of menu, if another menu exists, show it.
-if ( ! $add_new_screen && 0 < $menu_count && isset( $_GET['action'] ) && 'delete' == $_GET['action'] ) {
+if ( ! $add_new_screen && 0 < $menu_count && isset( $_GET['action'] ) && 'delete' === $_GET['action'] ) {
 	$nav_menu_selected_id = $nav_menus[0]->term_id;
 }
 
diff --git a/wp-admin/network.php b/wp-admin/network.php
index cc24b7f773..b52e03e97d 100644
--- a/wp-admin/network.php
+++ b/wp-admin/network.php
@@ -99,7 +99,7 @@ if ( $_POST ) {
 	if ( ! network_domain_check() ) {
 		$result = populate_network( 1, get_clean_basedomain(), sanitize_email( $_POST['email'] ), wp_unslash( $_POST['sitename'] ), $base, $subdomain_install );
 		if ( is_wp_error( $result ) ) {
-			if ( 1 == count( $result->get_error_codes() ) && 'no_wildcard_dns' == $result->get_error_code() ) {
+			if ( 1 == count( $result->get_error_codes() ) && 'no_wildcard_dns' === $result->get_error_code() ) {
 				network_step2( $result );
 			} else {
 				network_step1( $result );
diff --git a/wp-admin/options-discussion.php b/wp-admin/options-discussion.php
index 2eb571f995..d8e33c1adb 100644
--- a/wp-admin/options-discussion.php
+++ b/wp-admin/options-discussion.php
@@ -125,11 +125,11 @@ printf( __( 'Enable threaded (nested) comments %s levels deep' ), $thread_commen
 <input name="page_comments" type="checkbox" id="page_comments" value="1" <?php checked( '1', get_option( 'page_comments' ) ); ?> />
 <?php
 $default_comments_page = '</label> <label for="default_comments_page"><select name="default_comments_page" id="default_comments_page"><option value="newest"';
-if ( 'newest' == get_option( 'default_comments_page' ) ) {
+if ( 'newest' === get_option( 'default_comments_page' ) ) {
 	$default_comments_page .= ' selected="selected"';
 }
 $default_comments_page .= '>' . __( 'last' ) . '</option><option value="oldest"';
-if ( 'oldest' == get_option( 'default_comments_page' ) ) {
+if ( 'oldest' === get_option( 'default_comments_page' ) ) {
 	$default_comments_page .= ' selected="selected"';
 }
 $default_comments_page .= '>' . __( 'first' ) . '</option></select>';
@@ -146,11 +146,11 @@ printf(
 <?php
 
 $comment_order = '<select name="comment_order" id="comment_order"><option value="asc"';
-if ( 'asc' == get_option( 'comment_order' ) ) {
+if ( 'asc' === get_option( 'comment_order' ) ) {
 	$comment_order .= ' selected="selected"';
 }
 $comment_order .= '>' . __( 'older' ) . '</option><option value="desc"';
-if ( 'desc' == get_option( 'comment_order' ) ) {
+if ( 'desc' === get_option( 'comment_order' ) ) {
 	$comment_order .= ' selected="selected"';
 }
 $comment_order .= '>' . __( 'newer' ) . '</option></select>';
diff --git a/wp-admin/options.php b/wp-admin/options.php
index f5a5fb89a4..fcbb960209 100644
--- a/wp-admin/options.php
+++ b/wp-admin/options.php
@@ -64,7 +64,7 @@ if ( ! empty( $_GET['adminhash'] ) ) {
 	}
 	wp_redirect( admin_url( $redirect ) );
 	exit;
-} elseif ( ! empty( $_GET['dismiss'] ) && 'new_admin_email' == $_GET['dismiss'] ) {
+} elseif ( ! empty( $_GET['dismiss'] ) && 'new_admin_email' === $_GET['dismiss'] ) {
 	check_admin_referer( 'dismiss-' . get_current_blog_id() . '-new_admin_email' );
 	delete_option( 'adminhash' );
 	delete_option( 'new_admin_email' );
@@ -204,8 +204,8 @@ if ( ! is_multisite() ) {
  */
 $whitelist_options = apply_filters( 'whitelist_options', $whitelist_options );
 
-if ( 'update' == $action ) { // We are saving settings sent from a settings page.
-	if ( 'options' == $option_page && ! isset( $_POST['option_page'] ) ) { // This is for back compat and will eventually be removed.
+if ( 'update' === $action ) { // We are saving settings sent from a settings page.
+	if ( 'options' === $option_page && ! isset( $_POST['option_page'] ) ) { // This is for back compat and will eventually be removed.
 		$unregistered = true;
 		check_admin_referer( 'update-options' );
 	} else {
@@ -223,7 +223,7 @@ if ( 'update' == $action ) { // We are saving settings sent from a settings page
 		);
 	}
 
-	if ( 'options' == $option_page ) {
+	if ( 'options' === $option_page ) {
 		if ( is_multisite() && ! current_user_can( 'manage_network_options' ) ) {
 			wp_die( __( 'Sorry, you are not allowed to modify unregistered settings for this site.' ) );
 		}
@@ -232,14 +232,20 @@ if ( 'update' == $action ) { // We are saving settings sent from a settings page
 		$options = $whitelist_options[ $option_page ];
 	}
 
-	if ( 'general' == $option_page ) {
+	if ( 'general' === $option_page ) {
 		// Handle custom date/time formats.
-		if ( ! empty( $_POST['date_format'] ) && isset( $_POST['date_format_custom'] ) && '\c\u\s\t\o\m' == wp_unslash( $_POST['date_format'] ) ) {
+		if ( ! empty( $_POST['date_format'] ) && isset( $_POST['date_format_custom'] )
+			&& '\c\u\s\t\o\m' === wp_unslash( $_POST['date_format'] )
+		) {
 			$_POST['date_format'] = $_POST['date_format_custom'];
 		}
-		if ( ! empty( $_POST['time_format'] ) && isset( $_POST['time_format_custom'] ) && '\c\u\s\t\o\m' == wp_unslash( $_POST['time_format'] ) ) {
+
+		if ( ! empty( $_POST['time_format'] ) && isset( $_POST['time_format_custom'] )
+			&& '\c\u\s\t\o\m' === wp_unslash( $_POST['time_format'] )
+		) {
 			$_POST['time_format'] = $_POST['time_format_custom'];
 		}
+
 		// Map UTC+- timezones to gmt_offsets and set timezone_string to empty.
 		if ( ! empty( $_POST['timezone_string'] ) && preg_match( '/^UTC[+-]/', $_POST['timezone_string'] ) ) {
 			$_POST['gmt_offset']      = $_POST['timezone_string'];
@@ -335,9 +341,11 @@ $options = $wpdb->get_results( "SELECT * FROM $wpdb->options ORDER BY option_nam
 
 foreach ( (array) $options as $option ) :
 	$disabled = false;
-	if ( '' == $option->option_name ) {
+
+	if ( '' === $option->option_name ) {
 		continue;
 	}
+
 	if ( is_serialized( $option->option_value ) ) {
 		if ( is_serialized_string( $option->option_value ) ) {
 			// This is a serialized string, so we should display it.
@@ -354,6 +362,7 @@ foreach ( (array) $options as $option ) :
 		$options_to_update[] = $option->option_name;
 		$class               = 'all-options';
 	}
+
 	$name = esc_attr( $option->option_name );
 	?>
 <tr>
diff --git a/wp-admin/plugin-editor.php b/wp-admin/plugin-editor.php
index 2cf6e7dcb1..d85d5dd702 100644
--- a/wp-admin/plugin-editor.php
+++ b/wp-admin/plugin-editor.php
@@ -161,7 +161,7 @@ if ( ! empty( $posted_content ) ) {
 	$content = file_get_contents( $real_file );
 }
 
-if ( '.php' == substr( $real_file, strrpos( $real_file, '.' ) ) ) {
+if ( '.php' === substr( $real_file, strrpos( $real_file, '.' ) ) ) {
 	$functions = wp_doc_link_parse( $content );
 
 	if ( ! empty( $functions ) ) {
diff --git a/wp-admin/plugin-install.php b/wp-admin/plugin-install.php
index e45bf03a35..76e942a36d 100644
--- a/wp-admin/plugin-install.php
+++ b/wp-admin/plugin-install.php
@@ -6,7 +6,7 @@
  * @subpackage Administration
  */
 // TODO: Route this page via a specific iframe handler instead of the do_action below.
-if ( ! defined( 'IFRAME_REQUEST' ) && isset( $_GET['tab'] ) && ( 'plugin-information' == $_GET['tab'] ) ) {
+if ( ! defined( 'IFRAME_REQUEST' ) && isset( $_GET['tab'] ) && ( 'plugin-information' === $_GET['tab'] ) ) {
 	define( 'IFRAME_REQUEST', true );
 }
 
diff --git a/wp-admin/plugins.php b/wp-admin/plugins.php
index b7d1b2ddfc..8352e207ab 100644
--- a/wp-admin/plugins.php
+++ b/wp-admin/plugins.php
@@ -43,7 +43,7 @@ if ( $action ) {
 
 			$result = activate_plugin( $plugin, self_admin_url( 'plugins.php?error=true&plugin=' . urlencode( $plugin ) ), is_network_admin() );
 			if ( is_wp_error( $result ) ) {
-				if ( 'unexpected_output' == $result->get_error_code() ) {
+				if ( 'unexpected_output' === $result->get_error_code() ) {
 					$redirect = self_admin_url( 'plugins.php?error=true&charsout=' . strlen( $result->get_error_data() ) . '&plugin=' . urlencode( $plugin ) . "&plugin_status=$status&paged=$page&s=$s" );
 					wp_redirect( add_query_arg( '_error_nonce', wp_create_nonce( 'plugin-activation-error_' . $plugin ), $redirect ) );
 					exit;
@@ -62,10 +62,10 @@ if ( $action ) {
 				update_site_option( 'recently_activated', $recent );
 			}
 
-			if ( isset( $_GET['from'] ) && 'import' == $_GET['from'] ) {
+			if ( isset( $_GET['from'] ) && 'import' === $_GET['from'] ) {
 				// Overrides the ?error=true one above and redirects to the Imports page, stripping the -importer suffix.
 				wp_redirect( self_admin_url( 'import.php?import=' . str_replace( '-importer', '', dirname( $plugin ) ) ) );
-			} elseif ( isset( $_GET['from'] ) && 'press-this' == $_GET['from'] ) {
+			} elseif ( isset( $_GET['from'] ) && 'press-this' === $_GET['from'] ) {
 				wp_redirect( self_admin_url( 'press-this.php' ) );
 			} else {
 				// Overrides the ?error=true one above.
@@ -292,7 +292,7 @@ if ( $action ) {
 				foreach ( (array) $plugins as $plugin ) {
 					$plugin_slug = dirname( $plugin );
 
-					if ( '.' == $plugin_slug ) {
+					if ( '.' === $plugin_slug ) {
 						$data = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin );
 						if ( $data ) {
 							$plugin_info[ $plugin ]                     = $data;
@@ -579,7 +579,7 @@ elseif ( isset( $_GET['deleted'] ) ) :
 	<div id="message" class="updated notice is-dismissible"><p><?php _e( 'Plugin deactivated.' ); ?></p></div>
 <?php elseif ( isset( $_GET['deactivate-multi'] ) ) : ?>
 	<div id="message" class="updated notice is-dismissible"><p><?php _e( 'Selected plugins deactivated.' ); ?></p></div>
-<?php elseif ( 'update-selected' == $action ) : ?>
+<?php elseif ( 'update-selected' === $action ) : ?>
 	<div id="message" class="updated notice is-dismissible"><p><?php _e( 'All selected plugins are up to date.' ); ?></p></div>
 <?php elseif ( isset( $_GET['resume'] ) ) : ?>
 	<div id="message" class="updated notice is-dismissible"><p><?php _e( 'Plugin resumed.' ); ?></p></div>
diff --git a/wp-admin/post-new.php b/wp-admin/post-new.php
index 9074bedb5f..521ef9ef7c 100644
--- a/wp-admin/post-new.php
+++ b/wp-admin/post-new.php
@@ -25,10 +25,10 @@ if ( ! isset( $_GET['post_type'] ) ) {
 }
 $post_type_object = get_post_type_object( $post_type );
 
-if ( 'post' == $post_type ) {
+if ( 'post' === $post_type ) {
 	$parent_file  = 'edit.php';
 	$submenu_file = 'post-new.php';
-} elseif ( 'attachment' == $post_type ) {
+} elseif ( 'attachment' === $post_type ) {
 	if ( wp_redirect( admin_url( 'media-new.php' ) ) ) {
 		exit;
 	}
diff --git a/wp-admin/post.php b/wp-admin/post.php
index 355ce1aca9..b11dc15836 100644
--- a/wp-admin/post.php
+++ b/wp-admin/post.php
@@ -49,7 +49,7 @@ if ( isset( $_POST['post_type'] ) && $post && $post_type !== $_POST['post_type']
 
 if ( isset( $_POST['deletepost'] ) ) {
 	$action = 'delete';
-} elseif ( isset( $_POST['wp-preview'] ) && 'dopreview' == $_POST['wp-preview'] ) {
+} elseif ( isset( $_POST['wp-preview'] ) && 'dopreview' === $_POST['wp-preview'] ) {
 	$action = 'preview';
 }
 
@@ -57,7 +57,7 @@ $sendback = wp_get_referer();
 if ( ! $sendback ||
 	false !== strpos( $sendback, 'post.php' ) ||
 	false !== strpos( $sendback, 'post-new.php' ) ) {
-	if ( 'attachment' == $post_type ) {
+	if ( 'attachment' === $post_type ) {
 		$sendback = admin_url( 'upload.php' );
 	} else {
 		$sendback = admin_url( 'edit.php' );
@@ -111,7 +111,7 @@ switch ( $action ) {
 	case 'postajaxpost':
 	case 'post':
 		check_admin_referer( 'add-' . $post_type );
-		$post_id = 'postajaxpost' == $action ? edit_post() : write_post();
+		$post_id = 'postajaxpost' === $action ? edit_post() : write_post();
 		redirect_post( $post_id );
 		exit();
 
@@ -139,7 +139,7 @@ switch ( $action ) {
 			wp_die( __( 'Sorry, you are not allowed to edit this item.' ) );
 		}
 
-		if ( 'trash' == $post->post_status ) {
+		if ( 'trash' === $post->post_status ) {
 			wp_die( __( 'You can&#8217;t edit this item because it is in the Trash. Please restore it and try again.' ) );
 		}
 
@@ -151,11 +151,11 @@ switch ( $action ) {
 		}
 
 		$post_type = $post->post_type;
-		if ( 'post' == $post_type ) {
+		if ( 'post' === $post_type ) {
 			$parent_file   = 'edit.php';
 			$submenu_file  = 'edit.php';
 			$post_new_file = 'post-new.php';
-		} elseif ( 'attachment' == $post_type ) {
+		} elseif ( 'attachment' === $post_type ) {
 			$parent_file   = 'upload.php';
 			$submenu_file  = 'upload.php';
 			$post_new_file = 'media-new.php';
diff --git a/wp-admin/setup-config.php b/wp-admin/setup-config.php
index 36eee67451..b721f8158d 100644
--- a/wp-admin/setup-config.php
+++ b/wp-admin/setup-config.php
@@ -354,7 +354,7 @@ switch ( $step ) {
 
 		$key = 0;
 		foreach ( $config_file as $line_num => $line ) {
-			if ( '$table_prefix =' == substr( $line, 0, 15 ) ) {
+			if ( '$table_prefix =' === substr( $line, 0, 15 ) ) {
 				$config_file[ $line_num ] = '$table_prefix = \'' . addcslashes( $prefix, "\\'" ) . "';\r\n";
 				continue;
 			}
diff --git a/wp-admin/theme-editor.php b/wp-admin/theme-editor.php
index cc0c1f4c0d..411003c929 100644
--- a/wp-admin/theme-editor.php
+++ b/wp-admin/theme-editor.php
@@ -69,7 +69,7 @@ if ( ! $theme->exists() ) {
 	wp_die( __( 'The requested theme does not exist.' ) );
 }
 
-if ( $theme->errors() && 'theme_no_stylesheet' == $theme->errors()->get_error_code() ) {
+if ( $theme->errors() && 'theme_no_stylesheet' === $theme->errors()->get_error_code() ) {
 	wp_die( __( 'The requested theme does not exist.' ) . ' ' . $theme->errors()->get_error_message() );
 }
 
@@ -162,7 +162,7 @@ if ( ! empty( $posted_content ) ) {
 	$f       = fopen( $file, 'r' );
 	$content = fread( $f, filesize( $file ) );
 
-	if ( '.php' == substr( $file, strrpos( $file, '.' ) ) ) {
+	if ( '.php' === substr( $file, strrpos( $file, '.' ) ) ) {
 		$functions = wp_doc_link_parse( $content );
 
 		$docs_select  = '<select name="docs-list" id="docs-list">';
@@ -228,7 +228,7 @@ if ( $file_description != $file_show ) {
 		<select name="theme" id="theme">
 		<?php
 		foreach ( wp_get_themes( array( 'errors' => null ) ) as $a_stylesheet => $a_theme ) {
-			if ( $a_theme->errors() && 'theme_no_stylesheet' == $a_theme->errors()->get_error_code() ) {
+			if ( $a_theme->errors() && 'theme_no_stylesheet' === $a_theme->errors()->get_error_code() ) {
 				continue;
 			}
 
diff --git a/wp-admin/themes.php b/wp-admin/themes.php
index 485c7674c3..d1c1197618 100644
--- a/wp-admin/themes.php
+++ b/wp-admin/themes.php
@@ -18,7 +18,7 @@ if ( ! current_user_can( 'switch_themes' ) && ! current_user_can( 'edit_theme_op
 }
 
 if ( current_user_can( 'switch_themes' ) && isset( $_GET['action'] ) ) {
-	if ( 'activate' == $_GET['action'] ) {
+	if ( 'activate' === $_GET['action'] ) {
 		check_admin_referer( 'switch-theme_' . $_GET['stylesheet'] );
 		$theme = wp_get_theme( $_GET['stylesheet'] );
 
@@ -53,7 +53,7 @@ if ( current_user_can( 'switch_themes' ) && isset( $_GET['action'] ) ) {
 
 		wp_redirect( admin_url( 'themes.php?resumed=true' ) );
 		exit;
-	} elseif ( 'delete' == $_GET['action'] ) {
+	} elseif ( 'delete' === $_GET['action'] ) {
 		check_admin_referer( 'delete-theme_' . $_GET['stylesheet'] );
 		$theme = wp_get_theme( $_GET['stylesheet'] );
 
@@ -247,7 +247,7 @@ if ( ! $ct->errors() || ( 1 == count( $ct->errors()->get_error_codes() )
 if ( is_array( $submenu ) && isset( $submenu['themes.php'] ) ) {
 	foreach ( (array) $submenu['themes.php'] as $item ) {
 		$class = '';
-		if ( 'themes.php' == $item[2] || 'theme-editor.php' == $item[2] || 0 === strpos( $item[2], 'customize.php' ) ) {
+		if ( 'themes.php' === $item[2] || 'theme-editor.php' === $item[2] || 0 === strpos( $item[2], 'customize.php' ) ) {
 			continue;
 		}
 		// 0 = name, 1 = capability, 2 = file.
diff --git a/wp-admin/update-core.php b/wp-admin/update-core.php
index 9d21ac8c2c..c74e5c5546 100644
--- a/wp-admin/update-core.php
+++ b/wp-admin/update-core.php
@@ -690,9 +690,9 @@ function do_undismiss_core_update() {
 $action = isset( $_GET['action'] ) ? $_GET['action'] : 'upgrade-core';
 
 $upgrade_error = false;
-if ( ( 'do-theme-upgrade' == $action || ( 'do-plugin-upgrade' == $action && ! isset( $_GET['plugins'] ) ) )
+if ( ( 'do-theme-upgrade' === $action || ( 'do-plugin-upgrade' === $action && ! isset( $_GET['plugins'] ) ) )
 	&& ! isset( $_POST['checked'] ) ) {
-	$upgrade_error = 'do-theme-upgrade' == $action ? 'themes' : 'plugins';
+	$upgrade_error = ( 'do-theme-upgrade' === $action ) ? 'themes' : 'plugins';
 	$action        = 'upgrade-core';
 }
 
@@ -731,7 +731,7 @@ get_current_screen()->set_help_sidebar(
 	'<p>' . __( '<a href="https://wordpress.org/support/">Support</a>' ) . '</p>'
 );
 
-if ( 'upgrade-core' == $action ) {
+if ( 'upgrade-core' === $action ) {
 	// Force a update check when requested.
 	$force_check = ! empty( $_GET['force-check'] );
 	wp_version_check( array(), $force_check );
@@ -795,7 +795,7 @@ if ( 'upgrade-core' == $action ) {
 
 	require_once ABSPATH . 'wp-admin/admin-footer.php';
 
-} elseif ( 'do-core-upgrade' == $action || 'do-core-reinstall' == $action ) {
+} elseif ( 'do-core-upgrade' === $action || 'do-core-reinstall' === $action ) {
 
 	if ( ! current_user_can( 'update_core' ) ) {
 		wp_die( __( 'Sorry, you are not allowed to update this site.' ) );
@@ -811,7 +811,7 @@ if ( 'upgrade-core' == $action ) {
 	}
 
 	require_once ABSPATH . 'wp-admin/admin-header.php';
-	if ( 'do-core-reinstall' == $action ) {
+	if ( 'do-core-reinstall' === $action ) {
 		$reinstall = true;
 	} else {
 		$reinstall = false;
@@ -831,7 +831,7 @@ if ( 'upgrade-core' == $action ) {
 
 	require_once ABSPATH . 'wp-admin/admin-footer.php';
 
-} elseif ( 'do-plugin-upgrade' == $action ) {
+} elseif ( 'do-plugin-upgrade' === $action ) {
 
 	if ( ! current_user_can( 'update_plugins' ) ) {
 		wp_die( __( 'Sorry, you are not allowed to update this site.' ) );
@@ -869,7 +869,7 @@ if ( 'upgrade-core' == $action ) {
 
 	require_once ABSPATH . 'wp-admin/admin-footer.php';
 
-} elseif ( 'do-theme-upgrade' == $action ) {
+} elseif ( 'do-theme-upgrade' === $action ) {
 
 	if ( ! current_user_can( 'update_themes' ) ) {
 		wp_die( __( 'Sorry, you are not allowed to update this site.' ) );
@@ -909,7 +909,7 @@ if ( 'upgrade-core' == $action ) {
 
 	require_once ABSPATH . 'wp-admin/admin-footer.php';
 
-} elseif ( 'do-translation-upgrade' == $action ) {
+} elseif ( 'do-translation-upgrade' === $action ) {
 
 	if ( ! current_user_can( 'update_languages' ) ) {
 		wp_die( __( 'Sorry, you are not allowed to update this site.' ) );
diff --git a/wp-admin/update.php b/wp-admin/update.php
index 33d14e232e..8cb0cf44b8 100644
--- a/wp-admin/update.php
+++ b/wp-admin/update.php
@@ -22,7 +22,7 @@ if ( isset( $_GET['action'] ) ) {
 	$theme  = isset( $_REQUEST['theme'] ) ? urldecode( $_REQUEST['theme'] ) : '';
 	$action = isset( $_REQUEST['action'] ) ? $_REQUEST['action'] : '';
 
-	if ( 'update-selected' == $action ) {
+	if ( 'update-selected' === $action ) {
 		if ( ! current_user_can( 'update_plugins' ) ) {
 			wp_die( __( 'Sorry, you are not allowed to update plugins for this site.' ) );
 		}
@@ -50,7 +50,7 @@ if ( isset( $_GET['action'] ) ) {
 
 		iframe_footer();
 
-	} elseif ( 'upgrade-plugin' == $action ) {
+	} elseif ( 'upgrade-plugin' === $action ) {
 		if ( ! current_user_can( 'update_plugins' ) ) {
 			wp_die( __( 'Sorry, you are not allowed to update plugins for this site.' ) );
 		}
@@ -72,7 +72,7 @@ if ( isset( $_GET['action'] ) ) {
 
 		require_once ABSPATH . 'wp-admin/admin-footer.php';
 
-	} elseif ( 'activate-plugin' == $action ) {
+	} elseif ( 'activate-plugin' === $action ) {
 		if ( ! current_user_can( 'update_plugins' ) ) {
 			wp_die( __( 'Sorry, you are not allowed to update plugins for this site.' ) );
 		}
@@ -98,7 +98,7 @@ if ( isset( $_GET['action'] ) ) {
 			include WP_PLUGIN_DIR . '/' . $plugin;
 		}
 		iframe_footer();
-	} elseif ( 'install-plugin' == $action ) {
+	} elseif ( 'install-plugin' === $action ) {
 
 		if ( ! current_user_can( 'install_plugins' ) ) {
 			wp_die( __( 'Sorry, you are not allowed to install plugins on this site.' ) );
@@ -141,7 +141,7 @@ if ( isset( $_GET['action'] ) ) {
 
 		require_once ABSPATH . 'wp-admin/admin-footer.php';
 
-	} elseif ( 'upload-plugin' == $action ) {
+	} elseif ( 'upload-plugin' === $action ) {
 
 		if ( ! current_user_can( 'upload_plugins' ) ) {
 			wp_die( __( 'Sorry, you are not allowed to install plugins on this site.' ) );
@@ -171,7 +171,7 @@ if ( isset( $_GET['action'] ) ) {
 
 		require_once ABSPATH . 'wp-admin/admin-footer.php';
 
-	} elseif ( 'upgrade-theme' == $action ) {
+	} elseif ( 'upgrade-theme' === $action ) {
 
 		if ( ! current_user_can( 'update_themes' ) ) {
 			wp_die( __( 'Sorry, you are not allowed to update themes for this site.' ) );
@@ -193,7 +193,7 @@ if ( isset( $_GET['action'] ) ) {
 		$upgrader->upgrade( $theme );
 
 		require_once ABSPATH . 'wp-admin/admin-footer.php';
-	} elseif ( 'update-selected-themes' == $action ) {
+	} elseif ( 'update-selected-themes' === $action ) {
 		if ( ! current_user_can( 'update_themes' ) ) {
 			wp_die( __( 'Sorry, you are not allowed to update themes for this site.' ) );
 		}
@@ -220,7 +220,7 @@ if ( isset( $_GET['action'] ) ) {
 		$upgrader->bulk_upgrade( $themes );
 
 		iframe_footer();
-	} elseif ( 'install-theme' == $action ) {
+	} elseif ( 'install-theme' === $action ) {
 
 		if ( ! current_user_can( 'install_themes' ) ) {
 			wp_die( __( 'Sorry, you are not allowed to install themes on this site.' ) );
@@ -260,7 +260,7 @@ if ( isset( $_GET['action'] ) ) {
 
 		require_once ABSPATH . 'wp-admin/admin-footer.php';
 
-	} elseif ( 'upload-theme' == $action ) {
+	} elseif ( 'upload-theme' === $action ) {
 
 		if ( ! current_user_can( 'upload_themes' ) ) {
 			wp_die( __( 'Sorry, you are not allowed to install themes on this site.' ) );
diff --git a/wp-admin/upload.php b/wp-admin/upload.php
index 93eecc75e2..4e7c4893cc 100644
--- a/wp-admin/upload.php
+++ b/wp-admin/upload.php
@@ -120,7 +120,7 @@ $doaction = $wp_list_table->current_action();
 if ( $doaction ) {
 	check_admin_referer( 'bulk-media' );
 
-	if ( 'delete_all' == $doaction ) {
+	if ( 'delete_all' === $doaction ) {
 		$post_ids = $wpdb->get_col( "SELECT ID FROM $wpdb->posts WHERE post_type='attachment' AND post_status = 'trash'" );
 		$doaction = 'delete';
 	} elseif ( isset( $_REQUEST['media'] ) ) {
diff --git a/wp-admin/user-edit.php b/wp-admin/user-edit.php
index 49aff443a6..8c7088e96d 100644
--- a/wp-admin/user-edit.php
+++ b/wp-admin/user-edit.php
@@ -204,7 +204,7 @@ switch ( $action ) {
 		<?php endif; ?>
 		<?php if ( isset( $_GET['error'] ) ) : ?>
 <div class="notice notice-error">
-			<?php if ( 'new-email' == $_GET['error'] ) : ?>
+			<?php if ( 'new-email' === $_GET['error'] ) : ?>
 	<p><?php _e( 'Error while saving the new email address. Please try again.' ); ?></p>
 	<?php endif; ?>
 </div>
diff --git a/wp-admin/user-new.php b/wp-admin/user-new.php
index 90c385c9ae..06ba7efd9a 100644
--- a/wp-admin/user-new.php
+++ b/wp-admin/user-new.php
@@ -29,7 +29,7 @@ if ( is_multisite() ) {
 	add_filter( 'wpmu_signup_user_notification_email', 'admin_created_user_email' );
 }
 
-if ( isset( $_REQUEST['action'] ) && 'adduser' == $_REQUEST['action'] ) {
+if ( isset( $_REQUEST['action'] ) && 'adduser' === $_REQUEST['action'] ) {
 	check_admin_referer( 'add-user', '_wpnonce_add-user' );
 
 	$user_details = null;
@@ -148,7 +148,7 @@ Please click the following link to confirm the invite:
 	}
 	wp_redirect( $redirect );
 	die();
-} elseif ( isset( $_REQUEST['action'] ) && 'createuser' == $_REQUEST['action'] ) {
+} elseif ( isset( $_REQUEST['action'] ) && 'createuser' === $_REQUEST['action'] ) {
 	check_admin_referer( 'create-user', '_wpnonce_create-user' );
 
 	if ( ! current_user_can( 'create_users' ) ) {
@@ -331,7 +331,7 @@ if ( isset( $_GET['update'] ) ) {
 				break;
 		}
 	} else {
-		if ( 'add' == $_GET['update'] ) {
+		if ( 'add' === $_GET['update'] ) {
 			$messages[] = __( 'User added.' );
 		}
 	}
diff --git a/wp-content/themes/twentyeleven/content-featured.php b/wp-content/themes/twentyeleven/content-featured.php
index adaadcbf0a..7e6e957d30 100644
--- a/wp-content/themes/twentyeleven/content-featured.php
+++ b/wp-content/themes/twentyeleven/content-featured.php
@@ -32,24 +32,26 @@ global $feature_class;
 
 	<footer class="entry-meta">
 		<?php
-			/* translators: Used between list items, there is a space after the comma. */
-			$tag_list = get_the_tag_list( '', __( ', ', 'twentyeleven' ) );
-		if ( '' != $tag_list ) {
+		/* translators: Used between list items, there is a space after the comma. */
+		$tag_list = get_the_tag_list( '', __( ', ', 'twentyeleven' ) );
+
+		if ( '' !== $tag_list ) {
 			/* translators: 1: Category list, 2: Tag list, 3: Post permalink, 4: Post title. */
 			$utility_text = __( 'This entry was posted in %1$s and tagged %2$s. Bookmark the <a href="%3$s" title="Permalink to %4$s" rel="bookmark">permalink</a>.', 'twentyeleven' );
 		} else {
 			/* translators: 1: Category list, 3: Post permalink, 4: Post title. */
 			$utility_text = __( 'This entry was posted in %1$s. Bookmark the <a href="%3$s" title="Permalink to %4$s" rel="bookmark">permalink</a>.', 'twentyeleven' );
 		}
-			printf(
-				$utility_text,
-				/* translators: Used between list items, there is a space after the comma. */
-				get_the_category_list( __( ', ', 'twentyeleven' ) ),
-				$tag_list,
-				esc_url( get_permalink() ),
-				the_title_attribute( 'echo=0' )
-			);
-			?>
+
+		printf(
+			$utility_text,
+			/* translators: Used between list items, there is a space after the comma. */
+			get_the_category_list( __( ', ', 'twentyeleven' ) ),
+			$tag_list,
+			esc_url( get_permalink() ),
+			the_title_attribute( 'echo=0' )
+		);
+		?>
 
 		<?php edit_post_link( __( 'Edit', 'twentyeleven' ), '<span class="edit-link">', '</span>' ); ?>
 	</footer><!-- .entry-meta -->
diff --git a/wp-content/themes/twentyeleven/content-single.php b/wp-content/themes/twentyeleven/content-single.php
index 207c5c1b56..7427ddc01e 100644
--- a/wp-content/themes/twentyeleven/content-single.php
+++ b/wp-content/themes/twentyeleven/content-single.php
@@ -12,7 +12,7 @@
 	<header class="entry-header">
 		<h1 class="entry-title"><?php the_title(); ?></h1>
 
-		<?php if ( 'post' == get_post_type() ) : ?>
+		<?php if ( 'post' === get_post_type() ) : ?>
 		<div class="entry-meta">
 			<?php twentyeleven_posted_on(); ?>
 		</div><!-- .entry-meta -->
@@ -33,15 +33,16 @@
 
 	<footer class="entry-meta">
 		<?php
-			/* translators: Used between list items, there is a space after the comma. */
-			$categories_list = get_the_category_list( __( ', ', 'twentyeleven' ) );
+		/* translators: Used between list items, there is a space after the comma. */
+		$categories_list = get_the_category_list( __( ', ', 'twentyeleven' ) );
 
-			/* translators: Used between list items, there is a space after the comma. */
-			$tag_list = get_the_tag_list( '', __( ', ', 'twentyeleven' ) );
-		if ( '' != $tag_list ) {
+		/* translators: Used between list items, there is a space after the comma. */
+		$tag_list = get_the_tag_list( '', __( ', ', 'twentyeleven' ) );
+
+		if ( '' !== $tag_list ) {
 			/* translators: 1: Categories list, 2: Tag list, 3: Permalink, 4: Post title, 5: Author name, 6: Author URL. */
 			$utility_text = __( 'This entry was posted in %1$s and tagged %2$s by <a href="%6$s">%5$s</a>. Bookmark the <a href="%3$s" title="Permalink to %4$s" rel="bookmark">permalink</a>.', 'twentyeleven' );
-		} elseif ( '' != $categories_list ) {
+		} elseif ( '' !== $categories_list ) {
 			/* translators: 1: Categories list, 2: Tag list, 3: Permalink, 4: Post title, 5: Author name, 6: Author URL. */
 			$utility_text = __( 'This entry was posted in %1$s by <a href="%6$s">%5$s</a>. Bookmark the <a href="%3$s" title="Permalink to %4$s" rel="bookmark">permalink</a>.', 'twentyeleven' );
 		} else {
@@ -49,16 +50,17 @@
 			$utility_text = __( 'This entry was posted by <a href="%6$s">%5$s</a>. Bookmark the <a href="%3$s" title="Permalink to %4$s" rel="bookmark">permalink</a>.', 'twentyeleven' );
 		}
 
-			printf(
-				$utility_text,
-				$categories_list,
-				$tag_list,
-				esc_url( get_permalink() ),
-				the_title_attribute( 'echo=0' ),
-				get_the_author(),
-				esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) )
-			);
-			?>
+		printf(
+			$utility_text,
+			$categories_list,
+			$tag_list,
+			esc_url( get_permalink() ),
+			the_title_attribute( 'echo=0' ),
+			get_the_author(),
+			esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) )
+		);
+		?>
+
 		<?php edit_post_link( __( 'Edit', 'twentyeleven' ), '<span class="edit-link">', '</span>' ); ?>
 
 		<?php
diff --git a/wp-content/themes/twentyeleven/content.php b/wp-content/themes/twentyeleven/content.php
index d05aa83020..0951b408c9 100644
--- a/wp-content/themes/twentyeleven/content.php
+++ b/wp-content/themes/twentyeleven/content.php
@@ -19,7 +19,7 @@
 			<h1 class="entry-title"><a href="<?php the_permalink(); ?>" rel="bookmark"><?php the_title(); ?></a></h1>
 			<?php endif; ?>
 
-			<?php if ( 'post' == get_post_type() ) : ?>
+			<?php if ( 'post' === get_post_type() ) : ?>
 			<div class="entry-meta">
 				<?php twentyeleven_posted_on(); ?>
 			</div><!-- .entry-meta -->
diff --git a/wp-content/themes/twentyeleven/functions.php b/wp-content/themes/twentyeleven/functions.php
index 6fdb4459fd..28cf5d7209 100644
--- a/wp-content/themes/twentyeleven/functions.php
+++ b/wp-content/themes/twentyeleven/functions.php
@@ -147,7 +147,7 @@ if ( ! function_exists( 'twentyeleven_setup' ) ) :
 		add_theme_support( 'post-formats', array( 'aside', 'link', 'gallery', 'status', 'quote', 'image' ) );
 
 		$theme_options = twentyeleven_get_theme_options();
-		if ( 'dark' == $theme_options['color_scheme'] ) {
+		if ( 'dark' === $theme_options['color_scheme'] ) {
 			$default_background_color = '1d1d1d';
 		} else {
 			$default_background_color = 'e2e2e2';
@@ -328,7 +328,7 @@ if ( ! function_exists( 'twentyeleven_header_style' ) ) :
 		<style type="text/css" id="twentyeleven-header-css">
 		<?php
 		// Has the text been hidden?
-		if ( 'blank' == $text_color ) :
+		if ( 'blank' === $text_color ) :
 			?>
 		#site-title,
 		#site-description {
@@ -719,28 +719,29 @@ if ( ! function_exists( 'twentyeleven_comment' ) ) :
 			<footer class="comment-meta">
 				<div class="comment-author vcard">
 					<?php
-						$avatar_size = 68;
+					$avatar_size = 68;
+
 					if ( '0' != $comment->comment_parent ) {
 						$avatar_size = 39;
 					}
 
-						echo get_avatar( $comment, $avatar_size );
+					echo get_avatar( $comment, $avatar_size );
 
-						printf(
-							/* translators: 1: Comment author, 2: Date and time. */
-							__( '%1$s on %2$s <span class="says">said:</span>', 'twentyeleven' ),
-							sprintf( '<span class="fn">%s</span>', get_comment_author_link() ),
-							sprintf(
-								'<a href="%1$s"><time datetime="%2$s">%3$s</time></a>',
-								esc_url( get_comment_link( $comment->comment_ID ) ),
-								get_comment_time( 'c' ),
-								/* translators: 1: Date, 2: Time. */
-								sprintf( __( '%1$s at %2$s', 'twentyeleven' ), get_comment_date(), get_comment_time() )
-							)
-						);
+					printf(
+						/* translators: 1: Comment author, 2: Date and time. */
+						__( '%1$s on %2$s <span class="says">said:</span>', 'twentyeleven' ),
+						sprintf( '<span class="fn">%s</span>', get_comment_author_link() ),
+						sprintf(
+							'<a href="%1$s"><time datetime="%2$s">%3$s</time></a>',
+							esc_url( get_comment_link( $comment->comment_ID ) ),
+							get_comment_time( 'c' ),
+							/* translators: 1: Date, 2: Time. */
+							sprintf( __( '%1$s at %2$s', 'twentyeleven' ), get_comment_date(), get_comment_time() )
+						)
+					);
 					?>
 
-						<?php edit_comment_link( __( 'Edit', 'twentyeleven' ), '<span class="edit-link">', '</span>' ); ?>
+					<?php edit_comment_link( __( 'Edit', 'twentyeleven' ), '<span class="edit-link">', '</span>' ); ?>
 					</div><!-- .comment-author .vcard -->
 
 					<?php
diff --git a/wp-content/themes/twentyeleven/header.php b/wp-content/themes/twentyeleven/header.php
index d8afc3b577..2d69a0bc8b 100644
--- a/wp-content/themes/twentyeleven/header.php
+++ b/wp-content/themes/twentyeleven/header.php
@@ -128,7 +128,7 @@ if ( is_singular() && get_option( 'thread_comments' ) ) {
 
 			<?php
 				// Has the text been hidden?
-			if ( 'blank' == get_header_textcolor() ) :
+			if ( 'blank' === get_header_textcolor() ) :
 				$header_image_class = '';
 				if ( $header_image ) {
 					$header_image_class = ' with-image';
diff --git a/wp-content/themes/twentyeleven/inc/theme-options.php b/wp-content/themes/twentyeleven/inc/theme-options.php
index 23cf55f1dc..e0c73202bb 100644
--- a/wp-content/themes/twentyeleven/inc/theme-options.php
+++ b/wp-content/themes/twentyeleven/inc/theme-options.php
@@ -418,7 +418,7 @@ function twentyeleven_enqueue_color_scheme() {
 	$options      = twentyeleven_get_theme_options();
 	$color_scheme = $options['color_scheme'];
 
-	if ( 'dark' == $color_scheme ) {
+	if ( 'dark' === $color_scheme ) {
 		wp_enqueue_style( 'dark', get_template_directory_uri() . '/colors/dark.css', array(), '20190404' );
 	}
 
@@ -499,9 +499,9 @@ function twentyeleven_layout_classes( $existing_classes ) {
 		$classes = array( 'one-column' );
 	}
 
-	if ( 'content-sidebar' == $current_layout ) {
+	if ( 'content-sidebar' === $current_layout ) {
 		$classes[] = 'right-sidebar';
-	} elseif ( 'sidebar-content' == $current_layout ) {
+	} elseif ( 'sidebar-content' === $current_layout ) {
 		$classes[] = 'left-sidebar';
 	} else {
 		$classes[] = $current_layout;
diff --git a/wp-content/themes/twentyeleven/inc/widgets.php b/wp-content/themes/twentyeleven/inc/widgets.php
index ec1ad74243..ae28fd41ae 100644
--- a/wp-content/themes/twentyeleven/inc/widgets.php
+++ b/wp-content/themes/twentyeleven/inc/widgets.php
@@ -111,7 +111,7 @@ class Twenty_Eleven_Ephemera_Widget extends WP_Widget {
 				$ephemera->the_post();
 				?>
 
-				<?php if ( 'link' != get_post_format() ) : ?>
+				<?php if ( 'link' !== get_post_format() ) : ?>
 
 				<li class="widget-entry-title">
 					<a href="<?php echo esc_url( get_permalink() ); ?>" rel="bookmark"><?php the_title(); ?></a>
diff --git a/wp-content/themes/twentyeleven/showcase.php b/wp-content/themes/twentyeleven/showcase.php
index 2931b4073e..041054b8ae 100644
--- a/wp-content/themes/twentyeleven/showcase.php
+++ b/wp-content/themes/twentyeleven/showcase.php
@@ -33,7 +33,7 @@ get_header(); ?>
 					 * We are using a heading by rendering the_content
 					 * If we have content for this page, let's display it.
 					 */
-					if ( '' != get_the_content() ) {
+					if ( '' !== get_the_content() ) {
 						get_template_part( 'content', 'intro' );
 					}
 					?>
diff --git a/wp-content/themes/twentyeleven/sidebar.php b/wp-content/themes/twentyeleven/sidebar.php
index df543cf73a..6dbc7c5461 100644
--- a/wp-content/themes/twentyeleven/sidebar.php
+++ b/wp-content/themes/twentyeleven/sidebar.php
@@ -10,7 +10,7 @@
 $options        = twentyeleven_get_theme_options();
 $current_layout = $options['theme_layout'];
 
-if ( 'content' != $current_layout ) :
+if ( 'content' !== $current_layout ) :
 	?>
 		<div id="secondary" class="widget-area" role="complementary">
 			<?php if ( ! dynamic_sidebar( 'sidebar-1' ) ) : ?>
diff --git a/wp-content/themes/twentyfifteen/content-search.php b/wp-content/themes/twentyfifteen/content-search.php
index f8091ce6b2..59d8b32721 100644
--- a/wp-content/themes/twentyfifteen/content-search.php
+++ b/wp-content/themes/twentyfifteen/content-search.php
@@ -21,7 +21,7 @@
 		<?php the_excerpt(); ?>
 	</div><!-- .entry-summary -->
 
-	<?php if ( 'post' == get_post_type() ) : ?>
+	<?php if ( 'post' === get_post_type() ) : ?>
 
 		<footer class="entry-footer">
 			<?php twentyfifteen_entry_meta(); ?>
diff --git a/wp-content/themes/twentyfifteen/functions.php b/wp-content/themes/twentyfifteen/functions.php
index 55fc83ece7..206cf0b88d 100644
--- a/wp-content/themes/twentyfifteen/functions.php
+++ b/wp-content/themes/twentyfifteen/functions.php
@@ -320,13 +320,13 @@ if ( ! function_exists( 'twentyfifteen_fonts_url' ) ) :
 		 */
 		$subset = _x( 'no-subset', 'Add new subset (greek, cyrillic, devanagari, vietnamese)', 'twentyfifteen' );
 
-		if ( 'cyrillic' == $subset ) {
+		if ( 'cyrillic' === $subset ) {
 			$subsets .= ',cyrillic,cyrillic-ext';
-		} elseif ( 'greek' == $subset ) {
+		} elseif ( 'greek' === $subset ) {
 			$subsets .= ',greek,greek-ext';
-		} elseif ( 'devanagari' == $subset ) {
+		} elseif ( 'devanagari' === $subset ) {
 			$subsets .= ',devanagari';
-		} elseif ( 'vietnamese' == $subset ) {
+		} elseif ( 'vietnamese' === $subset ) {
 			$subsets .= ',vietnamese';
 		}
 
@@ -460,7 +460,7 @@ function twentyfifteen_post_nav_background() {
 	$next     = get_adjacent_post( false, '', false );
 	$css      = '';
 
-	if ( is_attachment() && 'attachment' == $previous->post_type ) {
+	if ( is_attachment() && 'attachment' === $previous->post_type ) {
 		return;
 	}
 
@@ -498,7 +498,7 @@ add_action( 'wp_enqueue_scripts', 'twentyfifteen_post_nav_background' );
  * @return string Menu item with possible description.
  */
 function twentyfifteen_nav_description( $item_output, $item, $depth, $args ) {
-	if ( 'primary' == $args->theme_location && $item->description ) {
+	if ( 'primary' === $args->theme_location && $item->description ) {
 		$item_output = str_replace( $args->link_after . '</a>', '<div class="menu-item-description">' . $item->description . '</div>' . $args->link_after . '</a>', $item_output );
 	}
 
diff --git a/wp-content/themes/twentyfifteen/inc/template-tags.php b/wp-content/themes/twentyfifteen/inc/template-tags.php
index 93b436fe5d..b2b515f487 100644
--- a/wp-content/themes/twentyfifteen/inc/template-tags.php
+++ b/wp-content/themes/twentyfifteen/inc/template-tags.php
@@ -84,7 +84,7 @@ if ( ! function_exists( 'twentyfifteen_entry_meta' ) ) :
 			);
 		}
 
-		if ( 'post' == get_post_type() ) {
+		if ( 'post' === get_post_type() ) {
 			if ( is_singular() || is_multi_author() ) {
 				printf(
 					'<span class="byline"><span class="author vcard"><span class="screen-reader-text">%1$s </span><a class="url fn n" href="%2$s">%3$s</a></span></span>',
diff --git a/wp-content/themes/twentyfourteen/content-featured-post.php b/wp-content/themes/twentyfourteen/content-featured-post.php
index 1c9eeff828..803451fc08 100644
--- a/wp-content/themes/twentyfourteen/content-featured-post.php
+++ b/wp-content/themes/twentyfourteen/content-featured-post.php
@@ -13,7 +13,7 @@
 	<?php
 	// Output the featured image.
 	if ( has_post_thumbnail() ) :
-		if ( 'grid' == get_theme_mod( 'featured_content_layout' ) ) {
+		if ( 'grid' === get_theme_mod( 'featured_content_layout' ) ) {
 			the_post_thumbnail();
 		} else {
 			the_post_thumbnail( 'twentyfourteen-full-width' );
diff --git a/wp-content/themes/twentyfourteen/content.php b/wp-content/themes/twentyfourteen/content.php
index a355f0143f..1c48043302 100644
--- a/wp-content/themes/twentyfourteen/content.php
+++ b/wp-content/themes/twentyfourteen/content.php
@@ -30,7 +30,7 @@
 
 		<div class="entry-meta">
 			<?php
-			if ( 'post' == get_post_type() ) {
+			if ( 'post' === get_post_type() ) {
 				twentyfourteen_posted_on();
 			}
 
diff --git a/wp-content/themes/twentyfourteen/functions.php b/wp-content/themes/twentyfourteen/functions.php
index a8797f91a3..d0a139ebda 100644
--- a/wp-content/themes/twentyfourteen/functions.php
+++ b/wp-content/themes/twentyfourteen/functions.php
@@ -340,7 +340,7 @@ function twentyfourteen_scripts() {
 		wp_enqueue_script( 'jquery-masonry' );
 	}
 
-	if ( is_front_page() && 'slider' == get_theme_mod( 'featured_content_layout' ) ) {
+	if ( is_front_page() && 'slider' === get_theme_mod( 'featured_content_layout' ) ) {
 		wp_enqueue_script( 'twentyfourteen-slider', get_template_directory_uri() . '/js/slider.js', array( 'jquery' ), '20150120', true );
 		wp_localize_script(
 			'twentyfourteen-slider',
@@ -567,7 +567,7 @@ function twentyfourteen_body_classes( $classes ) {
 		$classes[] = 'singular';
 	}
 
-	if ( is_front_page() && 'slider' == get_theme_mod( 'featured_content_layout' ) ) {
+	if ( is_front_page() && 'slider' === get_theme_mod( 'featured_content_layout' ) ) {
 		$classes[] = 'slider';
 	} elseif ( is_front_page() ) {
 		$classes[] = 'grid';
diff --git a/wp-content/themes/twentyfourteen/inc/featured-content.php b/wp-content/themes/twentyfourteen/inc/featured-content.php
index e794d4609b..f120b7fa39 100644
--- a/wp-content/themes/twentyfourteen/inc/featured-content.php
+++ b/wp-content/themes/twentyfourteen/inc/featured-content.php
@@ -302,7 +302,7 @@ class Featured_Content {
 		}
 
 		// Bail if term objects are unavailable.
-		if ( 'all' != $args['fields'] ) {
+		if ( 'all' !== $args['fields'] ) {
 			return $terms;
 		}
 
@@ -339,7 +339,7 @@ class Featured_Content {
 		}
 
 		// Make sure we are in the correct taxonomy.
-		if ( 'post_tag' != $taxonomy ) {
+		if ( 'post_tag' !== $taxonomy ) {
 			return $terms;
 		}
 
@@ -466,7 +466,7 @@ class Featured_Content {
 		$options = wp_parse_args( $saved, $defaults );
 		$options = array_intersect_key( $options, $defaults );
 
-		if ( 'all' != $key ) {
+		if ( 'all' !== $key ) {
 			return isset( $options[ $key ] ) ? $options[ $key ] : false;
 		}
 
diff --git a/wp-content/themes/twentynineteen/classes/class-twentynineteen-svg-icons.php b/wp-content/themes/twentynineteen/classes/class-twentynineteen-svg-icons.php
index 1546d0eb92..01a35c0309 100644
--- a/wp-content/themes/twentynineteen/classes/class-twentynineteen-svg-icons.php
+++ b/wp-content/themes/twentynineteen/classes/class-twentynineteen-svg-icons.php
@@ -25,9 +25,9 @@ class TwentyNineteen_SVG_Icons {
 	 * Gets the SVG code for a given icon.
 	 */
 	public static function get_svg( $group, $icon, $size ) {
-		if ( 'ui' == $group ) {
+		if ( 'ui' === $group ) {
 			$arr = self::$ui_icons;
-		} elseif ( 'social' == $group ) {
+		} elseif ( 'social' === $group ) {
 			$arr = self::$social_icons;
 		} else {
 			$arr = array();
diff --git a/wp-content/themes/twentyten/loop.php b/wp-content/themes/twentyten/loop.php
index fbe541096e..6d88f4bc5b 100644
--- a/wp-content/themes/twentyten/loop.php
+++ b/wp-content/themes/twentyten/loop.php
@@ -62,7 +62,7 @@ while ( have_posts() ) :
 
 	<?php /* How to display posts of the Gallery format. The gallery category is the old way. */ ?>
 
-	<?php if ( ( function_exists( 'get_post_format' ) && 'gallery' == get_post_format( $post->ID ) ) || in_category( _x( 'gallery', 'gallery category slug', 'twentyten' ) ) ) : ?>
+	<?php if ( ( function_exists( 'get_post_format' ) && 'gallery' === get_post_format( $post->ID ) ) || in_category( _x( 'gallery', 'gallery category slug', 'twentyten' ) ) ) : ?>
 		<div id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
 			<h2 class="entry-title"><a href="<?php the_permalink(); ?>" rel="bookmark"><?php the_title(); ?></a></h2>
 
@@ -102,7 +102,7 @@ while ( have_posts() ) :
 			<div class="entry-utility">
 			<?php
 			$gallery = get_term_by( 'slug', _x( 'gallery', 'gallery category slug', 'twentyten' ), 'category' );
-			if ( function_exists( 'get_post_format' ) && 'gallery' == get_post_format( $post->ID ) ) :
+			if ( function_exists( 'get_post_format' ) && 'gallery' === get_post_format( $post->ID ) ) :
 				?>
 				<a href="<?php echo esc_url( get_post_format_link( 'gallery' ) ); ?>" title="<?php esc_attr_e( 'View Galleries', 'twentyten' ); ?>"><?php _e( 'More Galleries', 'twentyten' ); ?></a>
 				<span class="meta-sep">|</span>
@@ -117,7 +117,7 @@ while ( have_posts() ) :
 
 		<?php /* How to display posts of the Aside format. The asides category is the old way. */ ?>
 
-	<?php elseif ( ( function_exists( 'get_post_format' ) && 'aside' == get_post_format( $post->ID ) ) || in_category( _x( 'asides', 'asides category slug', 'twentyten' ) ) ) : ?>
+	<?php elseif ( ( function_exists( 'get_post_format' ) && 'aside' === get_post_format( $post->ID ) ) || in_category( _x( 'asides', 'asides category slug', 'twentyten' ) ) ) : ?>
 		<div id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
 
 		<?php if ( is_archive() || is_search() ) : // Display excerpts for archives and search. ?>
diff --git a/wp-content/themes/twentythirteen/functions.php b/wp-content/themes/twentythirteen/functions.php
index cf9718c76c..1b474d9307 100644
--- a/wp-content/themes/twentythirteen/functions.php
+++ b/wp-content/themes/twentythirteen/functions.php
@@ -478,7 +478,7 @@ if ( ! function_exists( 'twentythirteen_entry_meta' ) ) :
 			echo '<span class="featured-post">' . esc_html__( 'Sticky', 'twentythirteen' ) . '</span>';
 		}
 
-		if ( ! has_post_format( 'link' ) && 'post' == get_post_type() ) {
+		if ( ! has_post_format( 'link' ) && 'post' === get_post_type() ) {
 			twentythirteen_entry_date();
 		}
 
@@ -495,7 +495,7 @@ if ( ! function_exists( 'twentythirteen_entry_meta' ) ) :
 		}
 
 		// Post author.
-		if ( 'post' == get_post_type() ) {
+		if ( 'post' === get_post_type() ) {
 			printf(
 				'<span class="author vcard"><a class="url fn n" href="%1$s" title="%2$s" rel="author">%3$s</a></span>',
 				esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
diff --git a/wp-content/themes/twentythirteen/js/theme-customizer.js b/wp-content/themes/twentythirteen/js/theme-customizer.js
index 60721045cd..7328f0d15b 100644
--- a/wp-content/themes/twentythirteen/js/theme-customizer.js
+++ b/wp-content/themes/twentythirteen/js/theme-customizer.js
@@ -20,8 +20,8 @@
 	// Header text color.
 	wp.customize( 'header_textcolor', function( value ) {
 		value.bind( function( to ) {
-			if ( 'blank' == to ) {
-				if ( 'remove-header' == wp.customize.instance( 'header_image' ).get() ) {
+			if ( 'blank' === to ) {
+				if ( 'remove-header' === wp.customize.instance( 'header_image' ).get() ) {
 					$( '.home-link' ).css( 'min-height', '0' );
 				}
 				$( '.site-title, .site-description' ).css( {
diff --git a/wp-content/themes/twentytwelve/functions.php b/wp-content/themes/twentytwelve/functions.php
index 366514bd76..9a333b47ed 100644
--- a/wp-content/themes/twentytwelve/functions.php
+++ b/wp-content/themes/twentytwelve/functions.php
@@ -158,11 +158,11 @@ function twentytwelve_get_font_url() {
 		 */
 		$subset = _x( 'no-subset', 'Open Sans font: add new subset (greek, cyrillic, vietnamese)', 'twentytwelve' );
 
-		if ( 'cyrillic' == $subset ) {
+		if ( 'cyrillic' === $subset ) {
 			$subsets .= ',cyrillic,cyrillic-ext';
-		} elseif ( 'greek' == $subset ) {
+		} elseif ( 'greek' === $subset ) {
 			$subsets .= ',greek,greek-ext';
-		} elseif ( 'vietnamese' == $subset ) {
+		} elseif ( 'vietnamese' === $subset ) {
 			$subsets .= ',vietnamese';
 		}
 
diff --git a/wp-content/themes/twentytwelve/js/theme-customizer.js b/wp-content/themes/twentytwelve/js/theme-customizer.js
index c388997da9..46195fbcee 100644
--- a/wp-content/themes/twentytwelve/js/theme-customizer.js
+++ b/wp-content/themes/twentytwelve/js/theme-customizer.js
@@ -41,9 +41,9 @@
 		value.bind( function( to ) {
 			var body = $( 'body' );
 
-			if ( ( '#ffffff' == to || '#fff' == to ) && 'none' == body.css( 'background-image' ) )
+			if ( ( '#ffffff' === to || '#fff' === to ) && 'none' === body.css( 'background-image' ) )
 				body.addClass( 'custom-background-white' );
-			else if ( '' == to && 'none' == body.css( 'background-image' ) )
+			else if ( '' === to && 'none' === body.css( 'background-image' ) )
 				body.addClass( 'custom-background-empty' );
 			else
 				body.removeClass( 'custom-background-empty custom-background-white' );
diff --git a/wp-includes/admin-bar.php b/wp-includes/admin-bar.php
index 00a0bcde8b..35d1d4c5b9 100644
--- a/wp-includes/admin-bar.php
+++ b/wp-includes/admin-bar.php
@@ -701,19 +701,20 @@ function wp_admin_bar_edit_menu( $wp_admin_bar ) {
 	if ( is_admin() ) {
 		$current_screen = get_current_screen();
 		$post           = get_post();
-		if ( 'post' == $current_screen->base ) {
+
+		if ( 'post' === $current_screen->base ) {
 			$post_type_object = get_post_type_object( $post->post_type );
-		} elseif ( 'edit' == $current_screen->base ) {
+		} elseif ( 'edit' === $current_screen->base ) {
 			$post_type_object = get_post_type_object( $current_screen->post_type );
 		}
 
-		if ( 'post' == $current_screen->base
-			&& 'add' != $current_screen->action
+		if ( 'post' === $current_screen->base
+			&& 'add' !== $current_screen->action
 			&& ( $post_type_object )
 			&& current_user_can( 'read_post', $post->ID )
 			&& ( $post_type_object->public )
 			&& ( $post_type_object->show_in_admin_bar ) ) {
-			if ( 'draft' == $post->post_status ) {
+			if ( 'draft' === $post->post_status ) {
 				$preview_link = get_preview_post_link( $post );
 				$wp_admin_bar->add_node(
 					array(
@@ -732,7 +733,7 @@ function wp_admin_bar_edit_menu( $wp_admin_bar ) {
 					)
 				);
 			}
-		} elseif ( 'edit' == $current_screen->base
+		} elseif ( 'edit' === $current_screen->base
 			&& ( $post_type_object )
 			&& ( $post_type_object->public )
 			&& ( $post_type_object->show_in_admin_bar )
@@ -745,7 +746,7 @@ function wp_admin_bar_edit_menu( $wp_admin_bar ) {
 					'href'  => get_post_type_archive_link( $current_screen->post_type ),
 				)
 			);
-		} elseif ( 'term' == $current_screen->base && isset( $tag ) && is_object( $tag ) && ! is_wp_error( $tag ) ) {
+		} elseif ( 'term' === $current_screen->base && isset( $tag ) && is_object( $tag ) && ! is_wp_error( $tag ) ) {
 			$tax = get_taxonomy( $tag->taxonomy );
 			if ( is_taxonomy_viewable( $tax ) ) {
 				$wp_admin_bar->add_node(
@@ -756,7 +757,7 @@ function wp_admin_bar_edit_menu( $wp_admin_bar ) {
 					)
 				);
 			}
-		} elseif ( 'user-edit' == $current_screen->base && isset( $user_id ) ) {
+		} elseif ( 'user-edit' === $current_screen->base && isset( $user_id ) ) {
 			$user_object = get_userdata( $user_id );
 			$view_link   = get_author_posts_url( $user_object->ID );
 			if ( $user_object->exists() && $view_link ) {
@@ -1204,7 +1205,7 @@ function is_admin_bar_showing() {
 	}
 
 	if ( ! isset( $show_admin_bar ) ) {
-		if ( ! is_user_logged_in() || 'wp-login.php' == $pagenow ) {
+		if ( ! is_user_logged_in() || 'wp-login.php' === $pagenow ) {
 			$show_admin_bar = false;
 		} else {
 			$show_admin_bar = _get_admin_bar_pref();
diff --git a/wp-includes/author-template.php b/wp-includes/author-template.php
index e2c0356e15..c1dbf4d5c4 100644
--- a/wp-includes/author-template.php
+++ b/wp-includes/author-template.php
@@ -349,7 +349,7 @@ function get_author_posts_url( $author_id, $author_nicename = '' ) {
 		$file = home_url( '/' );
 		$link = $file . '?author=' . $auth_ID;
 	} else {
-		if ( '' == $author_nicename ) {
+		if ( '' === $author_nicename ) {
 			$user = get_userdata( $author_id );
 			if ( ! empty( $user->user_nicename ) ) {
 				$author_nicename = $user->user_nicename;
@@ -467,7 +467,7 @@ function wp_list_authors( $args = '' ) {
 			continue; // No need to go further to process HTML.
 		}
 
-		if ( 'list' == $args['style'] ) {
+		if ( 'list' === $args['style'] ) {
 			$return .= '<li>';
 		}
 
@@ -513,7 +513,7 @@ function wp_list_authors( $args = '' ) {
 		}
 
 		$return .= $link;
-		$return .= ( 'list' == $args['style'] ) ? '</li>' : ', ';
+		$return .= ( 'list' === $args['style'] ) ? '</li>' : ', ';
 	}
 
 	$return = rtrim( $return, ', ' );
diff --git a/wp-includes/bookmark-template.php b/wp-includes/bookmark-template.php
index 9385a36982..4bc52fcd4f 100644
--- a/wp-includes/bookmark-template.php
+++ b/wp-includes/bookmark-template.php
@@ -83,7 +83,7 @@ function _walk_bookmarks( $bookmarks, $args = '' ) {
 		$title = $desc;
 
 		if ( $parsed_args['show_updated'] ) {
-			if ( '00' != substr( $bookmark->link_updated_f, 0, 2 ) ) {
+			if ( '00' !== substr( $bookmark->link_updated_f, 0, 2 ) ) {
 				$title .= ' (';
 				$title .= sprintf(
 					/* translators: %s: Date and time of last update. */
@@ -98,15 +98,15 @@ function _walk_bookmarks( $bookmarks, $args = '' ) {
 		}
 		$alt = ' alt="' . $name . ( $parsed_args['show_description'] ? ' ' . $title : '' ) . '"';
 
-		if ( '' != $title ) {
+		if ( '' !== $title ) {
 			$title = ' title="' . $title . '"';
 		}
 		$rel = $bookmark->link_rel;
-		if ( '' != $rel ) {
+		if ( '' !== $rel ) {
 			$rel = ' rel="' . esc_attr( $rel ) . '"';
 		}
 		$target = $bookmark->link_target;
-		if ( '' != $target ) {
+		if ( '' !== $target ) {
 			$target = ' target="' . $target . '"';
 		}
 		$output .= '<a href="' . $the_link . '"' . $rel . $title . $target . '>';
@@ -134,7 +134,7 @@ function _walk_bookmarks( $bookmarks, $args = '' ) {
 			$output .= '</em>';
 		}
 
-		if ( $parsed_args['show_description'] && '' != $desc ) {
+		if ( $parsed_args['show_description'] && '' !== $desc ) {
 			$output .= $parsed_args['between'] . $desc;
 		}
 
diff --git a/wp-includes/bookmark.php b/wp-includes/bookmark.php
index 411c8f369b..39c257cedc 100644
--- a/wp-includes/bookmark.php
+++ b/wp-includes/bookmark.php
@@ -418,29 +418,29 @@ function sanitize_bookmark_field( $field, $value, $bookmark_id, $context ) {
 			break;
 	}
 
-	if ( 'raw' == $context ) {
+	if ( 'raw' === $context ) {
 		return $value;
 	}
 
-	if ( 'edit' == $context ) {
+	if ( 'edit' === $context ) {
 		/** This filter is documented in wp-includes/post.php */
 		$value = apply_filters( "edit_{$field}", $value, $bookmark_id );
 
-		if ( 'link_notes' == $field ) {
+		if ( 'link_notes' === $field ) {
 			$value = esc_html( $value ); // textarea_escaped
 		} else {
 			$value = esc_attr( $value );
 		}
-	} elseif ( 'db' == $context ) {
+	} elseif ( 'db' === $context ) {
 		/** This filter is documented in wp-includes/post.php */
 		$value = apply_filters( "pre_{$field}", $value );
 	} else {
 		/** This filter is documented in wp-includes/post.php */
 		$value = apply_filters( "{$field}", $value, $bookmark_id, $context );
 
-		if ( 'attribute' == $context ) {
+		if ( 'attribute' === $context ) {
 			$value = esc_attr( $value );
-		} elseif ( 'js' == $context ) {
+		} elseif ( 'js' === $context ) {
 			$value = esc_js( $value );
 		}
 	}
diff --git a/wp-includes/capabilities.php b/wp-includes/capabilities.php
index 3442ab63cb..24b0aa9e0a 100644
--- a/wp-includes/capabilities.php
+++ b/wp-includes/capabilities.php
@@ -54,7 +54,7 @@ function map_meta_cap( $cap, $user_id, ...$args ) {
 		case 'edit_user':
 		case 'edit_users':
 			// Allow user to edit themselves.
-			if ( 'edit_user' == $cap && isset( $args[0] ) && $user_id == $args[0] ) {
+			if ( 'edit_user' === $cap && isset( $args[0] ) && $user_id == $args[0] ) {
 				break;
 			}
 
@@ -73,7 +73,7 @@ function map_meta_cap( $cap, $user_id, ...$args ) {
 				break;
 			}
 
-			if ( 'revision' == $post->post_type ) {
+			if ( 'revision' === $post->post_type ) {
 				$caps[] = 'do_not_allow';
 				break;
 			}
@@ -94,7 +94,7 @@ function map_meta_cap( $cap, $user_id, ...$args ) {
 			if ( ! $post_type->map_meta_cap ) {
 				$caps[] = $post_type->cap->$cap;
 				// Prior to 3.1 we would re-call map_meta_cap here.
-				if ( 'delete_post' == $cap ) {
+				if ( 'delete_post' === $cap ) {
 					$cap = $post_type->cap->$cap;
 				}
 				break;
@@ -105,7 +105,7 @@ function map_meta_cap( $cap, $user_id, ...$args ) {
 				// If the post is published or scheduled...
 				if ( in_array( $post->post_status, array( 'publish', 'future' ), true ) ) {
 					$caps[] = $post_type->cap->delete_published_posts;
-				} elseif ( 'trash' == $post->post_status ) {
+				} elseif ( 'trash' === $post->post_status ) {
 					$status = get_post_meta( $post->ID, '_wp_trash_meta_status', true );
 					if ( in_array( $status, array( 'publish', 'future' ), true ) ) {
 						$caps[] = $post_type->cap->delete_published_posts;
@@ -122,7 +122,7 @@ function map_meta_cap( $cap, $user_id, ...$args ) {
 				// The post is published or scheduled, extra cap required.
 				if ( in_array( $post->post_status, array( 'publish', 'future' ), true ) ) {
 					$caps[] = $post_type->cap->delete_published_posts;
-				} elseif ( 'private' == $post->post_status ) {
+				} elseif ( 'private' === $post->post_status ) {
 					$caps[] = $post_type->cap->delete_private_posts;
 				}
 			}
@@ -146,7 +146,7 @@ function map_meta_cap( $cap, $user_id, ...$args ) {
 				break;
 			}
 
-			if ( 'revision' == $post->post_type ) {
+			if ( 'revision' === $post->post_type ) {
 				$post = get_post( $post->post_parent );
 				if ( ! $post ) {
 					$caps[] = 'do_not_allow';
@@ -165,7 +165,7 @@ function map_meta_cap( $cap, $user_id, ...$args ) {
 			if ( ! $post_type->map_meta_cap ) {
 				$caps[] = $post_type->cap->$cap;
 				// Prior to 3.1 we would re-call map_meta_cap here.
-				if ( 'edit_post' == $cap ) {
+				if ( 'edit_post' === $cap ) {
 					$cap = $post_type->cap->$cap;
 				}
 				break;
@@ -176,7 +176,7 @@ function map_meta_cap( $cap, $user_id, ...$args ) {
 				// If the post is published or scheduled...
 				if ( in_array( $post->post_status, array( 'publish', 'future' ), true ) ) {
 					$caps[] = $post_type->cap->edit_published_posts;
-				} elseif ( 'trash' == $post->post_status ) {
+				} elseif ( 'trash' === $post->post_status ) {
 					$status = get_post_meta( $post->ID, '_wp_trash_meta_status', true );
 					if ( in_array( $status, array( 'publish', 'future' ), true ) ) {
 						$caps[] = $post_type->cap->edit_published_posts;
@@ -193,7 +193,7 @@ function map_meta_cap( $cap, $user_id, ...$args ) {
 				// The post is published or scheduled, extra cap required.
 				if ( in_array( $post->post_status, array( 'publish', 'future' ), true ) ) {
 					$caps[] = $post_type->cap->edit_published_posts;
-				} elseif ( 'private' == $post->post_status ) {
+				} elseif ( 'private' === $post->post_status ) {
 					$caps[] = $post_type->cap->edit_private_posts;
 				}
 			}
@@ -215,7 +215,7 @@ function map_meta_cap( $cap, $user_id, ...$args ) {
 				break;
 			}
 
-			if ( 'revision' == $post->post_type ) {
+			if ( 'revision' === $post->post_type ) {
 				$post = get_post( $post->post_parent );
 				if ( ! $post ) {
 					$caps[] = 'do_not_allow';
@@ -234,7 +234,7 @@ function map_meta_cap( $cap, $user_id, ...$args ) {
 			if ( ! $post_type->map_meta_cap ) {
 				$caps[] = $post_type->cap->$cap;
 				// Prior to 3.1 we would re-call map_meta_cap here.
-				if ( 'read_post' == $cap ) {
+				if ( 'read_post' === $cap ) {
 					$cap = $post_type->cap->$cap;
 				}
 				break;
diff --git a/wp-includes/category-template.php b/wp-includes/category-template.php
index 4b49c04f7a..aa090d11fe 100644
--- a/wp-includes/category-template.php
+++ b/wp-includes/category-template.php
@@ -155,7 +155,7 @@ function get_the_category_list( $separator = '', $parents = '', $post_id = false
 	$rel = ( is_object( $wp_rewrite ) && $wp_rewrite->using_permalinks() ) ? 'rel="category tag"' : 'rel="category"';
 
 	$thelist = '';
-	if ( '' == $separator ) {
+	if ( '' === $separator ) {
 		$thelist .= '<ul class="post-categories">';
 		foreach ( $categories as $category ) {
 			$thelist .= "\n\t<li>";
@@ -351,7 +351,7 @@ function wp_dropdown_categories( $args = '' ) {
 	$defaults['selected'] = ( is_category() ) ? get_query_var( 'cat' ) : 0;
 
 	// Back compat.
-	if ( isset( $args['type'] ) && 'link' == $args['type'] ) {
+	if ( isset( $args['type'] ) && 'link' === $args['type'] ) {
 		_deprecated_argument(
 			__FUNCTION__,
 			'3.0.0',
@@ -559,7 +559,7 @@ function wp_list_categories( $args = '' ) {
 	}
 
 	if ( ! isset( $parsed_args['class'] ) ) {
-		$parsed_args['class'] = ( 'category' == $parsed_args['taxonomy'] ) ? 'categories' : $parsed_args['taxonomy'];
+		$parsed_args['class'] = ( 'category' === $parsed_args['taxonomy'] ) ? 'categories' : $parsed_args['taxonomy'];
 	}
 
 	if ( ! taxonomy_exists( $parsed_args['taxonomy'] ) ) {
@@ -572,12 +572,16 @@ function wp_list_categories( $args = '' ) {
 	$categories = get_categories( $parsed_args );
 
 	$output = '';
-	if ( $parsed_args['title_li'] && 'list' == $parsed_args['style'] && ( ! empty( $categories ) || ! $parsed_args['hide_title_if_empty'] ) ) {
+
+	if ( $parsed_args['title_li'] && 'list' === $parsed_args['style']
+		&& ( ! empty( $categories ) || ! $parsed_args['hide_title_if_empty'] )
+	) {
 		$output = '<li class="' . esc_attr( $parsed_args['class'] ) . '">' . $parsed_args['title_li'] . '<ul>';
 	}
+
 	if ( empty( $categories ) ) {
 		if ( ! empty( $show_option_none ) ) {
-			if ( 'list' == $parsed_args['style'] ) {
+			if ( 'list' === $parsed_args['style'] ) {
 				$output .= '<li class="cat-item-none">' . $show_option_none . '</li>';
 			} else {
 				$output .= $show_option_none;
@@ -604,7 +608,7 @@ function wp_list_categories( $args = '' ) {
 
 			// Fallback for the 'All' link is the posts page.
 			if ( ! $posts_page ) {
-				if ( 'page' == get_option( 'show_on_front' ) && get_option( 'page_for_posts' ) ) {
+				if ( 'page' === get_option( 'show_on_front' ) && get_option( 'page_for_posts' ) ) {
 					$posts_page = get_permalink( get_option( 'page_for_posts' ) );
 				} else {
 					$posts_page = home_url( '/' );
@@ -612,7 +616,7 @@ function wp_list_categories( $args = '' ) {
 			}
 
 			$posts_page = esc_url( $posts_page );
-			if ( 'list' == $parsed_args['style'] ) {
+			if ( 'list' === $parsed_args['style'] ) {
 				$output .= "<li class='cat-item-all'><a href='$posts_page'>$show_option_all</a></li>";
 			} else {
 				$output .= "<a href='$posts_page'>$show_option_all</a>";
@@ -634,7 +638,9 @@ function wp_list_categories( $args = '' ) {
 		$output .= walk_category_tree( $categories, $depth, $parsed_args );
 	}
 
-	if ( $parsed_args['title_li'] && 'list' == $parsed_args['style'] && ( ! empty( $categories ) || ! $parsed_args['hide_title_if_empty'] ) ) {
+	if ( $parsed_args['title_li'] && 'list' === $parsed_args['style']
+		&& ( ! empty( $categories ) || ! $parsed_args['hide_title_if_empty'] )
+	) {
 		$output .= '</ul></li>';
 	}
 
@@ -713,7 +719,7 @@ function wp_tag_cloud( $args = '' ) {
 	}
 
 	foreach ( $tags as $key => $tag ) {
-		if ( 'edit' == $args['link'] ) {
+		if ( 'edit' === $args['link'] ) {
 			$link = get_edit_term_link( $tag->term_id, $tag->taxonomy, $args['post_type'] );
 		} else {
 			$link = get_term_link( intval( $tag->term_id ), $tag->taxonomy );
@@ -740,7 +746,7 @@ function wp_tag_cloud( $args = '' ) {
 	 */
 	$return = apply_filters( 'wp_tag_cloud', $return, $args );
 
-	if ( 'array' == $args['format'] || empty( $args['echo'] ) ) {
+	if ( 'array' === $args['format'] || empty( $args['echo'] ) ) {
 		return $return;
 	}
 
@@ -939,8 +945,8 @@ function wp_generate_tag_cloud( $tags, $args = '' ) {
 
 		$tags_data[] = array(
 			'id'              => $tag_id,
-			'url'             => '#' != $tag->link ? $tag->link : '#',
-			'role'            => '#' != $tag->link ? '' : ' role="button"',
+			'url'             => ( '#' !== $tag->link ) ? $tag->link : '#',
+			'role'            => ( '#' !== $tag->link ) ? '' : ' role="button"',
 			'name'            => $tag->name,
 			'formatted_count' => $formatted_count,
 			'slug'            => $tag->slug,
diff --git a/wp-includes/category.php b/wp-includes/category.php
index 3f5cb1929b..42ac6227f3 100644
--- a/wp-includes/category.php
+++ b/wp-includes/category.php
@@ -37,7 +37,7 @@ function get_categories( $args = '' ) {
 	$args['taxonomy'] = apply_filters( 'get_categories_taxonomy', $args['taxonomy'], $args );
 
 	// Back compat.
-	if ( isset( $args['type'] ) && 'link' == $args['type'] ) {
+	if ( isset( $args['type'] ) && 'link' === $args['type'] ) {
 		_deprecated_argument(
 			__FUNCTION__,
 			'3.0.0',
@@ -126,9 +126,11 @@ function get_category_by_path( $category_path, $full_match = true, $output = OBJ
 	$leaf_path      = sanitize_title( basename( $category_paths ) );
 	$category_paths = explode( '/', $category_paths );
 	$full_path      = '';
+
 	foreach ( (array) $category_paths as $pathdir ) {
-		$full_path .= ( '' != $pathdir ? '/' : '' ) . sanitize_title( $pathdir );
+		$full_path .= ( '' !== $pathdir ? '/' : '' ) . sanitize_title( $pathdir );
 	}
+
 	$categories = get_terms(
 		array(
 			'taxonomy' => 'category',
diff --git a/wp-includes/class-http.php b/wp-includes/class-http.php
index 51115bbf1a..963ed541e4 100644
--- a/wp-includes/class-http.php
+++ b/wp-includes/class-http.php
@@ -216,7 +216,7 @@ class WP_Http {
 		$args = wp_parse_args( $args );
 
 		// By default, HEAD requests do not cause redirections.
-		if ( isset( $args['method'] ) && 'HEAD' == $args['method'] ) {
+		if ( isset( $args['method'] ) && 'HEAD' === $args['method'] ) {
 			$defaults['redirection'] = 0;
 		}
 
@@ -739,7 +739,7 @@ class WP_Http {
 			} else {
 				$newheaders[ $key ] = $value;
 			}
-			if ( 'set-cookie' == $key ) {
+			if ( 'set-cookie' === $key ) {
 				$cookies[] = new WP_Http_Cookie( $value, $url );
 			}
 		}
@@ -870,7 +870,7 @@ class WP_Http {
 		$home = parse_url( get_option( 'siteurl' ) );
 
 		// Don't block requests back to ourselves by default.
-		if ( 'localhost' == $check['host'] || ( isset( $home['host'] ) && $home['host'] == $check['host'] ) ) {
+		if ( 'localhost' === $check['host'] || ( isset( $home['host'] ) && $home['host'] == $check['host'] ) ) {
 			/**
 			 * Filters whether to block local HTTP API requests.
 			 *
@@ -975,7 +975,7 @@ class WP_Http {
 		$path = ! empty( $url_parts['path'] ) ? $url_parts['path'] : '/';
 
 		// If it's a root-relative path, then great.
-		if ( ! empty( $relative_url_parts['path'] ) && '/' == $relative_url_parts['path'][0] ) {
+		if ( ! empty( $relative_url_parts['path'] ) && '/' === $relative_url_parts['path'][0] ) {
 			$path = $relative_url_parts['path'];
 
 			// Else it's a relative path.
@@ -1040,7 +1040,7 @@ class WP_Http {
 		$redirect_location = WP_Http::make_absolute_url( $redirect_location, $url );
 
 		// POST requests should not POST to a redirected location.
-		if ( 'POST' == $args['method'] ) {
+		if ( 'POST' === $args['method'] ) {
 			if ( in_array( $response['response']['code'], array( 302, 303 ), true ) ) {
 				$args['method'] = 'GET';
 			}
diff --git a/wp-includes/class-walker-category.php b/wp-includes/class-walker-category.php
index 16ad852e5b..c783cad3e9 100644
--- a/wp-includes/class-walker-category.php
+++ b/wp-includes/class-walker-category.php
@@ -53,7 +53,7 @@ class Walker_Category extends Walker {
 	 *                       value is 'list'. See wp_list_categories(). Default empty array.
 	 */
 	public function start_lvl( &$output, $depth = 0, $args = array() ) {
-		if ( 'list' != $args['style'] ) {
+		if ( 'list' !== $args['style'] ) {
 			return;
 		}
 
@@ -74,7 +74,7 @@ class Walker_Category extends Walker {
 	 *                       value is 'list'. See wp_list_categories(). Default empty array.
 	 */
 	public function end_lvl( &$output, $depth = 0, $args = array() ) {
-		if ( 'list' != $args['style'] ) {
+		if ( 'list' !== $args['style'] ) {
 			return;
 		}
 
@@ -186,7 +186,7 @@ class Walker_Category extends Walker {
 		if ( ! empty( $args['show_count'] ) ) {
 			$link .= ' (' . number_format_i18n( $category->count ) . ')';
 		}
-		if ( 'list' == $args['style'] ) {
+		if ( 'list' === $args['style'] ) {
 			$output     .= "\t<li";
 			$css_classes = array(
 				'cat-item',
@@ -258,7 +258,7 @@ class Walker_Category extends Walker {
 	 *                       to output. See wp_list_categories(). Default empty array.
 	 */
 	public function end_el( &$output, $page, $depth = 0, $args = array() ) {
-		if ( 'list' != $args['style'] ) {
+		if ( 'list' !== $args['style'] ) {
 			return;
 		}
 
diff --git a/wp-includes/class-walker-comment.php b/wp-includes/class-walker-comment.php
index 7325fd0a6a..e7498b3dd6 100644
--- a/wp-includes/class-walker-comment.php
+++ b/wp-includes/class-walker-comment.php
@@ -181,7 +181,7 @@ class Walker_Comment extends Walker {
 			return;
 		}
 
-		if ( ( 'pingback' == $comment->comment_type || 'trackback' == $comment->comment_type ) && $args['short_ping'] ) {
+		if ( ( 'pingback' === $comment->comment_type || 'trackback' === $comment->comment_type ) && $args['short_ping'] ) {
 			ob_start();
 			$this->ping( $comment, $depth, $args );
 			$output .= ob_get_clean();
@@ -216,7 +216,7 @@ class Walker_Comment extends Walker {
 			$output .= ob_get_clean();
 			return;
 		}
-		if ( 'div' == $args['style'] ) {
+		if ( 'div' === $args['style'] ) {
 			$output .= "</div><!-- #comment-## -->\n";
 		} else {
 			$output .= "</li><!-- #comment-## -->\n";
@@ -235,7 +235,7 @@ class Walker_Comment extends Walker {
 	 * @param array      $args    An array of arguments.
 	 */
 	protected function ping( $comment, $depth, $args ) {
-		$tag = ( 'div' == $args['style'] ) ? 'div' : 'li';
+		$tag = ( 'div' === $args['style'] ) ? 'div' : 'li';
 		?>
 		<<?php echo $tag; ?> id="comment-<?php comment_ID(); ?>" <?php comment_class( '', $comment ); ?>>
 			<div class="comment-body">
@@ -256,7 +256,7 @@ class Walker_Comment extends Walker {
 	 * @param array      $args    An array of arguments.
 	 */
 	protected function comment( $comment, $depth, $args ) {
-		if ( 'div' == $args['style'] ) {
+		if ( 'div' === $args['style'] ) {
 			$tag       = 'div';
 			$add_below = 'comment';
 		} else {
@@ -273,7 +273,7 @@ class Walker_Comment extends Walker {
 
 		?>
 		<<?php echo $tag; ?> <?php comment_class( $this->has_children ? 'parent' : '', $comment ); ?> id="comment-<?php comment_ID(); ?>">
-		<?php if ( 'div' != $args['style'] ) : ?>
+		<?php if ( 'div' !== $args['style'] ) : ?>
 		<div id="div-comment-<?php comment_ID(); ?>" class="comment-body">
 		<?php endif; ?>
 		<div class="comment-author vcard">
@@ -334,7 +334,7 @@ class Walker_Comment extends Walker {
 		);
 		?>
 
-		<?php if ( 'div' != $args['style'] ) : ?>
+		<?php if ( 'div' !== $args['style'] ) : ?>
 		</div>
 		<?php endif; ?>
 		<?php
diff --git a/wp-includes/class-walker-page.php b/wp-includes/class-walker-page.php
index 557bf309b0..9589996721 100644
--- a/wp-includes/class-walker-page.php
+++ b/wp-includes/class-walker-page.php
@@ -201,7 +201,7 @@ class Walker_Page extends Walker {
 		);
 
 		if ( ! empty( $args['show_date'] ) ) {
-			if ( 'modified' == $args['show_date'] ) {
+			if ( 'modified' === $args['show_date'] ) {
 				$time = $page->post_modified;
 			} else {
 				$time = $page->post_date;
diff --git a/wp-includes/class-wp-comment-query.php b/wp-includes/class-wp-comment-query.php
index ae176bc510..020bce9378 100644
--- a/wp-includes/class-wp-comment-query.php
+++ b/wp-includes/class-wp-comment-query.php
@@ -388,7 +388,7 @@ class WP_Comment_Query {
 		 *
 		 * The expected return type from this filter depends on the value passed in the request query_vars.
 		 * When `$this->query_vars['count']` is set, the filter should return the comment count as an int.
-		 * When `'ids' == $this->query_vars['fields']`, the filter should return an array of comment ids.
+		 * When `'ids' === $this->query_vars['fields']`, the filter should return an array of comment ids.
 		 * Otherwise the filter should return an array of WP_Comment objects.
 		 *
 		 * @since 5.3.0
@@ -444,7 +444,7 @@ class WP_Comment_Query {
 
 		$comment_ids = array_map( 'intval', $comment_ids );
 
-		if ( 'ids' == $this->query_vars['fields'] ) {
+		if ( 'ids' === $this->query_vars['fields'] ) {
 			$this->comments = $comment_ids;
 			return $this->comments;
 		}
@@ -570,7 +570,7 @@ class WP_Comment_Query {
 			}
 		}
 
-		$order = ( 'ASC' == strtoupper( $this->query_vars['order'] ) ) ? 'ASC' : 'DESC';
+		$order = ( 'ASC' === strtoupper( $this->query_vars['order'] ) ) ? 'ASC' : 'DESC';
 
 		// Disable ORDER BY with 'none', an empty array, or boolean false.
 		if ( in_array( $this->query_vars['orderby'], array( 'none', array(), false ), true ) ) {
diff --git a/wp-includes/class-wp-customize-nav-menus.php b/wp-includes/class-wp-customize-nav-menus.php
index 7126955751..df374b9865 100644
--- a/wp-includes/class-wp-customize-nav-menus.php
+++ b/wp-includes/class-wp-customize-nav-menus.php
@@ -154,7 +154,7 @@ final class WP_Customize_Nav_Menus {
 			$suppress_page_ids = array();
 			if ( 0 === $page && 'page' === $object ) {
 				// Insert Front Page or custom "Home" link.
-				$front_page = 'page' == get_option( 'show_on_front' ) ? (int) get_option( 'page_on_front' ) : 0;
+				$front_page = 'page' === get_option( 'show_on_front' ) ? (int) get_option( 'page_on_front' ) : 0;
 				if ( ! empty( $front_page ) ) {
 					$front_page_obj      = get_post( $front_page );
 					$important_pages[]   = $front_page_obj;
@@ -172,7 +172,7 @@ final class WP_Customize_Nav_Menus {
 				}
 
 				// Insert Posts Page.
-				$posts_page = 'page' == get_option( 'show_on_front' ) ? (int) get_option( 'page_for_posts' ) : 0;
+				$posts_page = 'page' === get_option( 'show_on_front' ) ? (int) get_option( 'page_for_posts' ) : 0;
 				if ( ! empty( $posts_page ) ) {
 					$posts_page_obj      = get_post( $posts_page );
 					$important_pages[]   = $posts_page_obj;
@@ -445,7 +445,7 @@ final class WP_Customize_Nav_Menus {
 		// Add "Home" link if search term matches. Treat as a page, but switch to custom on add.
 		if ( isset( $args['s'] ) ) {
 			// Only insert custom "Home" link if there's no Front Page
-			$front_page = 'page' == get_option( 'show_on_front' ) ? (int) get_option( 'page_on_front' ) : 0;
+			$front_page = 'page' === get_option( 'show_on_front' ) ? (int) get_option( 'page_on_front' ) : 0;
 			if ( empty( $front_page ) ) {
 				$title   = _x( 'Home', 'nav menu home label' );
 				$matches = function_exists( 'mb_stripos' ) ? false !== mb_stripos( $title, $args['s'] ) : false !== stripos( $title, $args['s'] );
diff --git a/wp-includes/class-wp-editor.php b/wp-includes/class-wp-editor.php
index 6af472469d..3ed8ffdcb0 100644
--- a/wp-includes/class-wp-editor.php
+++ b/wp-includes/class-wp-editor.php
@@ -524,7 +524,7 @@ final class _WP_Editors {
 									$strings .= @file_get_contents( $path . $mce_locale . '_dlg.js' ) . "\n";
 								}
 
-								if ( 'en' != $mce_locale && empty( $strings ) ) {
+								if ( 'en' !== $mce_locale && empty( $strings ) ) {
 									if ( @is_file( $path . 'en.js' ) ) {
 										$str1     = @file_get_contents( $path . 'en.js' );
 										$strings .= preg_replace( '/([\'"])en\./', '$1' . $mce_locale . '.', $str1, 1 ) . "\n";
@@ -834,8 +834,8 @@ final class _WP_Editors {
 				$options .= $key . ':' . $val . ',';
 				continue;
 			} elseif ( ! empty( $value ) && is_string( $value ) && (
-				( '{' == $value[0] && '}' == $value[ strlen( $value ) - 1 ] ) ||
-				( '[' == $value[0] && ']' == $value[ strlen( $value ) - 1 ] ) ||
+				( '{' === $value[0] && '}' === $value[ strlen( $value ) - 1 ] ) ||
+				( '[' === $value[0] && ']' === $value[ strlen( $value ) - 1 ] ) ||
 				preg_match( '/^\(?function ?\(/', $value ) ) ) {
 
 				$options .= $key . ':' . $value . ',';
@@ -1776,7 +1776,7 @@ final class _WP_Editors {
 		// Build results.
 		$results = array();
 		foreach ( $posts as $post ) {
-			if ( 'post' == $post->post_type ) {
+			if ( 'post' === $post->post_type ) {
 				$info = mysql2date( __( 'Y/m/d' ), $post->post_date );
 			} else {
 				$info = $pts[ $post->post_type ]->labels->singular_name;
diff --git a/wp-includes/class-wp-embed.php b/wp-includes/class-wp-embed.php
index eb77fe1431..10d36afcd0 100644
--- a/wp-includes/class-wp-embed.php
+++ b/wp-includes/class-wp-embed.php
@@ -355,7 +355,7 @@ class WP_Embed {
 		}
 
 		foreach ( $post_metas as $post_meta_key ) {
-			if ( '_oembed_' == substr( $post_meta_key, 0, 8 ) ) {
+			if ( '_oembed_' === substr( $post_meta_key, 0, 8 ) ) {
 				delete_post_meta( $post_ID, $post_meta_key );
 			}
 		}
diff --git a/wp-includes/class-wp-http-cookie.php b/wp-includes/class-wp-http-cookie.php
index 430bc47119..560af08c54 100644
--- a/wp-includes/class-wp-http-cookie.php
+++ b/wp-includes/class-wp-http-cookie.php
@@ -99,7 +99,7 @@ class WP_Http_Cookie {
 			$this->domain = $arrURL['host'];
 		}
 		$this->path = isset( $arrURL['path'] ) ? $arrURL['path'] : '/';
-		if ( '/' != substr( $this->path, -1 ) ) {
+		if ( '/' !== substr( $this->path, -1 ) ) {
 			$this->path = dirname( $this->path ) . '/';
 		}
 
@@ -127,7 +127,7 @@ class WP_Http_Cookie {
 
 				list( $key, $val ) = strpos( $pair, '=' ) ? explode( '=', $pair ) : array( $pair, '' );
 				$key               = strtolower( trim( $key ) );
-				if ( 'expires' == $key ) {
+				if ( 'expires' === $key ) {
 					$val = strtotime( $val );
 				}
 				$this->$key = $val;
@@ -174,7 +174,7 @@ class WP_Http_Cookie {
 
 		// Get details on the URL we're thinking about sending to.
 		$url         = parse_url( $url );
-		$url['port'] = isset( $url['port'] ) ? $url['port'] : ( 'https' == $url['scheme'] ? 443 : 80 );
+		$url['port'] = isset( $url['port'] ) ? $url['port'] : ( 'https' === $url['scheme'] ? 443 : 80 );
 		$url['path'] = isset( $url['path'] ) ? $url['path'] : '/';
 
 		// Values to use for comparison against the URL.
@@ -186,7 +186,7 @@ class WP_Http_Cookie {
 		}
 
 		// Host - very basic check that the request URL ends with the domain restriction (minus leading dot).
-		$domain = substr( $domain, 0, 1 ) == '.' ? substr( $domain, 1 ) : $domain;
+		$domain = ( '.' === substr( $domain, 0, 1 ) ) ? substr( $domain, 1 ) : $domain;
 		if ( substr( $url['host'], -strlen( $domain ) ) != $domain ) {
 			return false;
 		}
diff --git a/wp-includes/class-wp-http-encoding.php b/wp-includes/class-wp-http-encoding.php
index ab92865c60..a64253123a 100644
--- a/wp-includes/class-wp-http-encoding.php
+++ b/wp-includes/class-wp-http-encoding.php
@@ -101,7 +101,7 @@ class WP_Http_Encoding {
 	public static function compatible_gzinflate( $gzData ) {
 
 		// Compressed data might contain a full header, if so strip it for gzinflate().
-		if ( substr( $gzData, 0, 3 ) == "\x1f\x8b\x08" ) {
+		if ( "\x1f\x8b\x08" === substr( $gzData, 0, 3 ) ) {
 			$i   = 10;
 			$flg = ord( substr( $gzData, 3, 1 ) );
 			if ( $flg > 0 ) {
diff --git a/wp-includes/class-wp-http-streams.php b/wp-includes/class-wp-http-streams.php
index e4e641ea84..1ecb0a6b53 100644
--- a/wp-includes/class-wp-http-streams.php
+++ b/wp-includes/class-wp-http-streams.php
@@ -84,7 +84,7 @@ class WP_Http_Streams {
 		 * to ::1, which fails when the server is not set up for it. For compatibility, always
 		 * connect to the IPv4 address.
 		 */
-		if ( 'localhost' == strtolower( $connect_host ) ) {
+		if ( 'localhost' === strtolower( $connect_host ) ) {
 			$connect_host = '127.0.0.1';
 		}
 
@@ -186,8 +186,8 @@ class WP_Http_Streams {
 
 		$include_port_in_host_header = (
 			( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) ||
-			( 'http' == $arrURL['scheme'] && 80 != $arrURL['port'] ) ||
-			( 'https' == $arrURL['scheme'] && 443 != $arrURL['port'] )
+			( 'http' === $arrURL['scheme'] && 80 != $arrURL['port'] ) ||
+			( 'https' === $arrURL['scheme'] && 443 != $arrURL['port'] )
 		);
 
 		if ( $include_port_in_host_header ) {
@@ -334,7 +334,9 @@ class WP_Http_Streams {
 		}
 
 		// If the body was chunk encoded, then decode it.
-		if ( ! empty( $process['body'] ) && isset( $arrHeaders['headers']['transfer-encoding'] ) && 'chunked' == $arrHeaders['headers']['transfer-encoding'] ) {
+		if ( ! empty( $process['body'] ) && isset( $arrHeaders['headers']['transfer-encoding'] )
+			&& 'chunked' === $arrHeaders['headers']['transfer-encoding']
+		) {
 			$process['body'] = WP_Http::chunkTransferDecode( $process['body'] );
 		}
 
@@ -405,7 +407,7 @@ class WP_Http_Streams {
 		}
 
 		// IP's can't be wildcards, Stop processing.
-		if ( 'ip' == $host_type ) {
+		if ( 'ip' === $host_type ) {
 			return false;
 		}
 
diff --git a/wp-includes/class-wp-image-editor.php b/wp-includes/class-wp-image-editor.php
index 70af8cdc79..b052dec339 100644
--- a/wp-includes/class-wp-image-editor.php
+++ b/wp-includes/class-wp-image-editor.php
@@ -240,7 +240,7 @@ abstract class WP_Image_Editor {
 			 */
 			$quality = apply_filters( 'wp_editor_set_quality', $this->default_quality, $this->mime_type );
 
-			if ( 'image/jpeg' == $this->mime_type ) {
+			if ( 'image/jpeg' === $this->mime_type ) {
 				/**
 				 * Filters the JPEG compression quality for backward-compatibility.
 				 *
diff --git a/wp-includes/class-wp-list-util.php b/wp-includes/class-wp-list-util.php
index 3366af37ae..3b1d328447 100644
--- a/wp-includes/class-wp-list-util.php
+++ b/wp-includes/class-wp-list-util.php
@@ -112,9 +112,9 @@ class WP_List_Util {
 			}
 
 			if (
-				( 'AND' == $operator && $matched == $count ) ||
-				( 'OR' == $operator && $matched > 0 ) ||
-				( 'NOT' == $operator && 0 == $matched )
+				( 'AND' === $operator && $matched == $count ) ||
+				( 'OR' === $operator && $matched > 0 ) ||
+				( 'NOT' === $operator && 0 == $matched )
 			) {
 				$filtered[ $key ] = $obj;
 			}
diff --git a/wp-includes/class-wp-locale.php b/wp-includes/class-wp-locale.php
index de3745702d..59ad290e08 100644
--- a/wp-includes/class-wp-locale.php
+++ b/wp-includes/class-wp-locale.php
@@ -214,7 +214,7 @@ class WP_Locale {
 			$this->text_direction = $GLOBALS['text_direction'];
 
 			/* translators: 'rtl' or 'ltr'. This sets the text direction for WordPress. */
-		} elseif ( 'rtl' == _x( 'ltr', 'text direction' ) ) {
+		} elseif ( 'rtl' === _x( 'ltr', 'text direction' ) ) {
 			$this->text_direction = 'rtl';
 		}
 	}
@@ -346,7 +346,7 @@ class WP_Locale {
 	 * @return bool Whether locale is RTL.
 	 */
 	public function is_rtl() {
-		return 'rtl' == $this->text_direction;
+		return 'rtl' === $this->text_direction;
 	}
 
 	/**
diff --git a/wp-includes/class-wp-meta-query.php b/wp-includes/class-wp-meta-query.php
index af446aef74..6bfcb89999 100644
--- a/wp-includes/class-wp-meta-query.php
+++ b/wp-includes/class-wp-meta-query.php
@@ -138,7 +138,7 @@ class WP_Meta_Query {
 			return;
 		}
 
-		if ( isset( $meta_query['relation'] ) && strtoupper( $meta_query['relation'] ) == 'OR' ) {
+		if ( isset( $meta_query['relation'] ) && 'OR' === strtoupper( $meta_query['relation'] ) ) {
 			$this->relation = 'OR';
 		} else {
 			$this->relation = 'AND';
@@ -295,7 +295,7 @@ class WP_Meta_Query {
 			return 'CHAR';
 		}
 
-		if ( 'NUMERIC' == $meta_type ) {
+		if ( 'NUMERIC' === $meta_type ) {
 			$meta_type = 'SIGNED';
 		}
 
diff --git a/wp-includes/class-wp-network-query.php b/wp-includes/class-wp-network-query.php
index c38a696380..61651cae40 100644
--- a/wp-includes/class-wp-network-query.php
+++ b/wp-includes/class-wp-network-query.php
@@ -262,7 +262,7 @@ class WP_Network_Query {
 
 		$network_ids = array_map( 'intval', $network_ids );
 
-		if ( 'ids' == $this->query_vars['fields'] ) {
+		if ( 'ids' === $this->query_vars['fields'] ) {
 			$this->networks = $network_ids;
 			return $this->networks;
 		}
diff --git a/wp-includes/class-wp-oembed.php b/wp-includes/class-wp-oembed.php
index 5fbe1677d0..235faa6619 100644
--- a/wp-includes/class-wp-oembed.php
+++ b/wp-includes/class-wp-oembed.php
@@ -487,7 +487,7 @@ class WP_oEmbed {
 						$providers[ $linktypes[ $atts['type'] ] ] = htmlspecialchars_decode( $atts['href'] );
 
 						// Stop here if it's JSON (that's all we need).
-						if ( 'json' == $linktypes[ $atts['type'] ] ) {
+						if ( 'json' === $linktypes[ $atts['type'] ] ) {
 							break;
 						}
 					}
@@ -537,7 +537,7 @@ class WP_oEmbed {
 
 		foreach ( array( 'json', 'xml' ) as $format ) {
 			$result = $this->_fetch_with_format( $provider, $format );
-			if ( is_wp_error( $result ) && 'not-implemented' == $result->get_error_code() ) {
+			if ( is_wp_error( $result ) && 'not-implemented' === $result->get_error_code() ) {
 				continue;
 			}
 			return ( $result && ! is_wp_error( $result ) ) ? $result : false;
diff --git a/wp-includes/class-wp-post-type.php b/wp-includes/class-wp-post-type.php
index 847bfef7cb..be156f5fd1 100644
--- a/wp-includes/class-wp-post-type.php
+++ b/wp-includes/class-wp-post-type.php
@@ -485,7 +485,7 @@ final class WP_Post_Type {
 			}
 		}
 
-		if ( false !== $args['rewrite'] && ( is_admin() || '' != get_option( 'permalink_structure' ) ) ) {
+		if ( false !== $args['rewrite'] && ( is_admin() || get_option( 'permalink_structure' ) ) ) {
 			if ( ! is_array( $args['rewrite'] ) ) {
 				$args['rewrite'] = array();
 			}
@@ -554,7 +554,7 @@ final class WP_Post_Type {
 			$wp->add_query_var( $this->query_var );
 		}
 
-		if ( false !== $this->rewrite && ( is_admin() || '' != get_option( 'permalink_structure' ) ) ) {
+		if ( false !== $this->rewrite && ( is_admin() || get_option( 'permalink_structure' ) ) ) {
 			if ( $this->hierarchical ) {
 				add_rewrite_tag( "%$this->name%", '(.+?)', $this->query_var ? "{$this->query_var}=" : "post_type=$this->name&pagename=" );
 			} else {
diff --git a/wp-includes/class-wp-query.php b/wp-includes/class-wp-query.php
index 50da8ed7d2..5027f21cf0 100644
--- a/wp-includes/class-wp-query.php
+++ b/wp-includes/class-wp-query.php
@@ -804,14 +804,14 @@ class WP_Query {
 
 		$qv['attachment_id'] = absint( $qv['attachment_id'] );
 
-		if ( ( '' != $qv['attachment'] ) || ! empty( $qv['attachment_id'] ) ) {
+		if ( ( '' !== $qv['attachment'] ) || ! empty( $qv['attachment_id'] ) ) {
 			$this->is_single     = true;
 			$this->is_attachment = true;
-		} elseif ( '' != $qv['name'] ) {
+		} elseif ( '' !== $qv['name'] ) {
 			$this->is_single = true;
 		} elseif ( $qv['p'] ) {
 			$this->is_single = true;
-		} elseif ( '' != $qv['pagename'] || ! empty( $qv['page_id'] ) ) {
+		} elseif ( '' !== $qv['pagename'] || ! empty( $qv['page_id'] ) ) {
 			$this->is_page   = true;
 			$this->is_single = false;
 		} else {
@@ -879,7 +879,7 @@ class WP_Query {
 				}
 			}
 
-			if ( '' != $qv['w'] ) {
+			if ( $qv['w'] ) {
 				$this->is_date = true;
 			}
 
@@ -891,7 +891,7 @@ class WP_Query {
 					continue;
 				}
 
-				if ( isset( $tax_query['operator'] ) && 'NOT IN' != $tax_query['operator'] ) {
+				if ( isset( $tax_query['operator'] ) && 'NOT IN' !== $tax_query['operator'] ) {
 					switch ( $tax_query['taxonomy'] ) {
 						case 'category':
 							$this->is_category = true;
@@ -912,7 +912,7 @@ class WP_Query {
 				$this->is_author = true;
 			}
 
-			if ( '' != $qv['author_name'] ) {
+			if ( '' !== $qv['author_name'] ) {
 				$this->is_author = true;
 			}
 
@@ -971,10 +971,10 @@ class WP_Query {
 		}
 
 		// Correct `is_*` for 'page_on_front' and 'page_for_posts'.
-		if ( $this->is_home && 'page' == get_option( 'show_on_front' ) && get_option( 'page_on_front' ) ) {
+		if ( $this->is_home && 'page' === get_option( 'show_on_front' ) && get_option( 'page_on_front' ) ) {
 			$_query = wp_parse_args( $this->query );
 			// 'pagename' can be set and empty depending on matched rewrite rules. Ignore an empty 'pagename'.
-			if ( isset( $_query['pagename'] ) && '' == $_query['pagename'] ) {
+			if ( isset( $_query['pagename'] ) && '' === $_query['pagename'] ) {
 				unset( $_query['pagename'] );
 			}
 
@@ -992,10 +992,10 @@ class WP_Query {
 			}
 		}
 
-		if ( '' != $qv['pagename'] ) {
+		if ( '' !== $qv['pagename'] ) {
 			$this->queried_object = get_page_by_path( $qv['pagename'] );
 
-			if ( $this->queried_object && 'attachment' == $this->queried_object->post_type ) {
+			if ( $this->queried_object && 'attachment' === $this->queried_object->post_type ) {
 				if ( preg_match( '/^[^%]*%(?:postname)%/', get_option( 'permalink_structure' ) ) ) {
 					// See if we also have a post with the same slug.
 					$post = get_page_by_path( $qv['pagename'], OBJECT, 'post' );
@@ -1103,7 +1103,7 @@ class WP_Query {
 		}
 
 		foreach ( get_taxonomies( array(), 'objects' ) as $taxonomy => $t ) {
-			if ( 'post_tag' == $taxonomy ) {
+			if ( 'post_tag' === $taxonomy ) {
 				continue; // Handled further down in the $q['tag'] block.
 			}
 
@@ -1235,7 +1235,7 @@ class WP_Query {
 
 		// Tag stuff.
 
-		if ( '' != $q['tag'] && ! $this->is_singular && $this->query_vars_changed ) {
+		if ( '' !== $q['tag'] && ! $this->is_singular && $this->query_vars_changed ) {
 			if ( strpos( $q['tag'], ',' ) !== false ) {
 				$tags = preg_split( '/[,\r\n\t ]+/', $q['tag'] );
 				foreach ( (array) $tags as $tag ) {
@@ -1993,7 +1993,7 @@ class WP_Query {
 		}
 
 		// If we've got a post_type AND it's not "any" post_type.
-		if ( ! empty( $q['post_type'] ) && 'any' != $q['post_type'] ) {
+		if ( ! empty( $q['post_type'] ) && 'any' !== $q['post_type'] ) {
 			foreach ( (array) $q['post_type'] as $_post_type ) {
 				$ptype_obj = get_post_type_object( $_post_type );
 				if ( ! $ptype_obj || ! $ptype_obj->query_var || empty( $q[ $ptype_obj->query_var ] ) ) {
@@ -2020,14 +2020,14 @@ class WP_Query {
 		}
 
 		// Parameters related to 'post_name'.
-		if ( '' != $q['name'] ) {
+		if ( '' !== $q['name'] ) {
 			$q['name'] = sanitize_title_for_query( $q['name'] );
 			$where    .= " AND {$wpdb->posts}.post_name = '" . $q['name'] . "'";
-		} elseif ( '' != $q['pagename'] ) {
+		} elseif ( '' !== $q['pagename'] ) {
 			if ( isset( $this->queried_object_id ) ) {
 				$reqpage = $this->queried_object_id;
 			} else {
-				if ( 'page' != $q['post_type'] ) {
+				if ( 'page' !== $q['post_type'] ) {
 					foreach ( (array) $q['post_type'] as $_post_type ) {
 						$ptype_obj = get_post_type_object( $_post_type );
 						if ( ! $ptype_obj || ! $ptype_obj->hierarchical ) {
@@ -2051,12 +2051,12 @@ class WP_Query {
 			}
 
 			$page_for_posts = get_option( 'page_for_posts' );
-			if ( ( 'page' != get_option( 'show_on_front' ) ) || empty( $page_for_posts ) || ( $reqpage != $page_for_posts ) ) {
+			if ( ( 'page' !== get_option( 'show_on_front' ) ) || empty( $page_for_posts ) || ( $reqpage != $page_for_posts ) ) {
 				$q['pagename'] = sanitize_title_for_query( wp_basename( $q['pagename'] ) );
 				$q['name']     = $q['pagename'];
 				$where        .= " AND ({$wpdb->posts}.ID = '$reqpage')";
 				$reqpage_obj   = get_post( $reqpage );
-				if ( is_object( $reqpage_obj ) && 'attachment' == $reqpage_obj->post_type ) {
+				if ( is_object( $reqpage_obj ) && 'attachment' === $reqpage_obj->post_type ) {
 					$this->is_attachment = true;
 					$post_type           = 'attachment';
 					$q['post_type']      = 'attachment';
@@ -2064,7 +2064,7 @@ class WP_Query {
 					$q['attachment_id']  = $reqpage;
 				}
 			}
-		} elseif ( '' != $q['attachment'] ) {
+		} elseif ( '' !== $q['attachment'] ) {
 			$q['attachment'] = sanitize_title_for_query( wp_basename( $q['attachment'] ) );
 			$q['name']       = $q['attachment'];
 			$where          .= " AND {$wpdb->posts}.post_name = '" . $q['attachment'] . "'";
@@ -2239,7 +2239,7 @@ class WP_Query {
 
 		// Author stuff for nice URLs.
 
-		if ( '' != $q['author_name'] ) {
+		if ( '' !== $q['author_name'] ) {
 			if ( strpos( $q['author_name'], '/' ) !== false ) {
 				$q['author_name'] = explode( '/', $q['author_name'] );
 				if ( $q['author_name'][ count( $q['author_name'] ) - 1 ] ) {
@@ -2285,7 +2285,7 @@ class WP_Query {
 
 		// MIME-Type stuff for attachment browsing.
 
-		if ( isset( $q['post_mime_type'] ) && '' != $q['post_mime_type'] ) {
+		if ( isset( $q['post_mime_type'] ) && '' !== $q['post_mime_type'] ) {
 			$whichmimetype = wp_post_mime_type_where( $q['post_mime_type'], $wpdb->posts );
 		}
 		$where .= $search . $whichauthor . $whichmimetype;
@@ -2320,7 +2320,7 @@ class WP_Query {
 			} else {
 				$orderby = "{$wpdb->posts}.post_date " . $q['order'];
 			}
-		} elseif ( 'none' == $q['orderby'] ) {
+		} elseif ( 'none' === $q['orderby'] ) {
 			$orderby = '';
 		} else {
 			$orderby_array = array();
@@ -2413,7 +2413,7 @@ class WP_Query {
 			$where .= $wpdb->prepare( " AND {$wpdb->posts}.ping_status = %s ", $q['ping_status'] );
 		}
 
-		if ( 'any' == $post_type ) {
+		if ( 'any' === $post_type ) {
 			$in_search_post_types = get_post_types( array( 'exclude_from_search' => false ) );
 			if ( empty( $in_search_post_types ) ) {
 				$where .= ' AND 1=0 ';
@@ -2468,7 +2468,7 @@ class WP_Query {
 			} else {
 				foreach ( get_post_stati() as $status ) {
 					if ( in_array( $status, $q_status, true ) ) {
-						if ( 'private' == $status ) {
+						if ( 'private' === $status ) {
 							$p_status[] = "{$wpdb->posts}.post_status = '$status'";
 						} else {
 							$r_status[] = "{$wpdb->posts}.post_status = '$status'";
@@ -2477,7 +2477,7 @@ class WP_Query {
 				}
 			}
 
-			if ( empty( $q['perm'] ) || 'readable' != $q['perm'] ) {
+			if ( empty( $q['perm'] ) || 'readable' !== $q['perm'] ) {
 				$r_status = array_merge( $r_status, $p_status );
 				unset( $p_status );
 			}
@@ -2486,14 +2486,14 @@ class WP_Query {
 				$statuswheres[] = '(' . join( ' AND ', $e_status ) . ')';
 			}
 			if ( ! empty( $r_status ) ) {
-				if ( ! empty( $q['perm'] ) && 'editable' == $q['perm'] && ! current_user_can( $edit_others_cap ) ) {
+				if ( ! empty( $q['perm'] ) && 'editable' === $q['perm'] && ! current_user_can( $edit_others_cap ) ) {
 					$statuswheres[] = "({$wpdb->posts}.post_author = $user_id " . 'AND (' . join( ' OR ', $r_status ) . '))';
 				} else {
 					$statuswheres[] = '(' . join( ' OR ', $r_status ) . ')';
 				}
 			}
 			if ( ! empty( $p_status ) ) {
-				if ( ! empty( $q['perm'] ) && 'readable' == $q['perm'] && ! current_user_can( $read_private_cap ) ) {
+				if ( ! empty( $q['perm'] ) && 'readable' === $q['perm'] && ! current_user_can( $read_private_cap ) ) {
 					$statuswheres[] = "({$wpdb->posts}.post_author = $user_id " . 'AND (' . join( ' OR ', $p_status ) . '))';
 				} else {
 					$statuswheres[] = '(' . join( ' OR ', $p_status ) . ')';
@@ -2515,7 +2515,7 @@ class WP_Query {
 			// Add public states.
 			$public_states = get_post_stati( array( 'public' => true ) );
 			foreach ( (array) $public_states as $state ) {
-				if ( 'publish' == $state ) { // Publish is hard-coded above.
+				if ( 'publish' === $state ) { // Publish is hard-coded above.
 					continue;
 				}
 				$where .= " OR {$wpdb->posts}.post_status = '$state'";
@@ -2948,7 +2948,7 @@ class WP_Query {
 		 */
 		$this->posts = apply_filters_ref_array( 'posts_pre_query', array( null, &$this ) );
 
-		if ( 'ids' == $q['fields'] ) {
+		if ( 'ids' === $q['fields'] ) {
 			if ( null === $this->posts ) {
 				$this->posts = $wpdb->get_col( $this->request );
 			}
@@ -2960,7 +2960,7 @@ class WP_Query {
 			return $this->posts;
 		}
 
-		if ( 'id=>parent' == $q['fields'] ) {
+		if ( 'id=>parent' === $q['fields'] ) {
 			if ( null === $this->posts ) {
 				$this->posts = $wpdb->get_results( $this->request );
 			}
@@ -2980,7 +2980,7 @@ class WP_Query {
 		}
 
 		if ( null === $this->posts ) {
-			$split_the_query = ( $old_request == $this->request && "{$wpdb->posts}.*" == $fields && ! empty( $limits ) && $q['posts_per_page'] < 500 );
+			$split_the_query = ( $old_request == $this->request && "{$wpdb->posts}.*" === $fields && ! empty( $limits ) && $q['posts_per_page'] < 500 );
 
 			/**
 			 * Filters whether to split the query.
@@ -3093,7 +3093,7 @@ class WP_Query {
 								$this->posts = array();
 							} else {
 								$this->is_preview = true;
-								if ( 'future' != $status ) {
+								if ( 'future' !== $status ) {
 									$this->posts[0]->post_date = current_time( 'mysql' );
 								}
 							}
@@ -3481,7 +3481,7 @@ class WP_Query {
 					$query              = $this->tax_query->queried_terms[ $matched_taxonomy ];
 
 					if ( ! empty( $query['terms'] ) ) {
-						if ( 'term_id' == $query['field'] ) {
+						if ( 'term_id' === $query['field'] ) {
 							$term = get_term( reset( $query['terms'] ), $matched_taxonomy );
 						} else {
 							$term = get_term_by( $query['field'], reset( $query['terms'] ), $matched_taxonomy );
@@ -3876,7 +3876,7 @@ class WP_Query {
 			return (bool) $this->is_feed;
 		}
 		$qv = $this->get( 'feed' );
-		if ( 'feed' == $qv ) {
+		if ( 'feed' === $qv ) {
 			$qv = get_default_feed();
 		}
 		return in_array( $qv, (array) $feeds, true );
@@ -3911,9 +3911,11 @@ class WP_Query {
 	 */
 	public function is_front_page() {
 		// Most likely case.
-		if ( 'posts' == get_option( 'show_on_front' ) && $this->is_home() ) {
+		if ( 'posts' === get_option( 'show_on_front' ) && $this->is_home() ) {
 			return true;
-		} elseif ( 'page' == get_option( 'show_on_front' ) && get_option( 'page_on_front' ) && $this->is_page( get_option( 'page_on_front' ) ) ) {
+		} elseif ( 'page' === get_option( 'show_on_front' ) && get_option( 'page_on_front' )
+			&& $this->is_page( get_option( 'page_on_front' ) )
+		) {
 			return true;
 		} else {
 			return false;
@@ -3954,7 +3956,9 @@ class WP_Query {
 	 * @return bool True, if Privacy Policy page.
 	 */
 	public function is_privacy_policy() {
-		if ( get_option( 'wp_page_for_privacy_policy' ) && $this->is_page( get_option( 'wp_page_for_privacy_policy' ) ) ) {
+		if ( get_option( 'wp_page_for_privacy_policy' )
+			&& $this->is_page( get_option( 'wp_page_for_privacy_policy' ) )
+		) {
 			return true;
 		} else {
 			return false;
diff --git a/wp-includes/class-wp-rewrite.php b/wp-includes/class-wp-rewrite.php
index ca82342114..e23c483893 100644
--- a/wp-includes/class-wp-rewrite.php
+++ b/wp-includes/class-wp-rewrite.php
@@ -526,7 +526,7 @@ class WP_Rewrite {
 		preg_match_all( '/%.+?%/', $this->permalink_structure, $tokens );
 		$tok_index = 1;
 		foreach ( (array) $tokens[0] as $token ) {
-			if ( '%post_id%' == $token && ( $tok_index <= 3 ) ) {
+			if ( '%post_id%' === $token && ( $tok_index <= 3 ) ) {
 				$front = $front . 'date/';
 				break;
 			}
@@ -1261,10 +1261,10 @@ class WP_Rewrite {
 
 		// robots.txt -- only if installed at the root.
 		$home_path      = parse_url( home_url() );
-		$robots_rewrite = ( empty( $home_path['path'] ) || '/' == $home_path['path'] ) ? array( 'robots\.txt$' => $this->index . '?robots=1' ) : array();
+		$robots_rewrite = ( empty( $home_path['path'] ) || '/' === $home_path['path'] ) ? array( 'robots\.txt$' => $this->index . '?robots=1' ) : array();
 
 		// favicon.ico -- only if installed at the root.
-		$favicon_rewrite = ( empty( $home_path['path'] ) || '/' == $home_path['path'] ) ? array( 'favicon\.ico$' => $this->index . '?favicon=1' ) : array();
+		$favicon_rewrite = ( empty( $home_path['path'] ) || '/' === $home_path['path'] ) ? array( 'favicon\.ico$' => $this->index . '?favicon=1' ) : array();
 
 		// Old feed and service files.
 		$deprecated_files = array(
@@ -1404,7 +1404,8 @@ class WP_Rewrite {
 			 * @param string[] $rules Array of rewrite rules generated for the current permastruct, keyed by their regex pattern.
 			 */
 			$rules = apply_filters( "{$permastructname}_rewrite_rules", $rules );
-			if ( 'post_tag' == $permastructname ) {
+
+			if ( 'post_tag' === $permastructname ) {
 
 				/**
 				 * Filters rewrite rules used specifically for Tags.
@@ -1647,7 +1648,7 @@ class WP_Rewrite {
 		if ( $external ) {
 			$this->add_external_rule( $regex, $query );
 		} else {
-			if ( 'bottom' == $after ) {
+			if ( 'bottom' === $after ) {
 				$this->extra_rules = array_merge( $this->extra_rules, array( $regex => $query ) );
 			} else {
 				$this->extra_rules_top = array_merge( $this->extra_rules_top, array( $regex => $query ) );
@@ -1854,7 +1855,8 @@ class WP_Rewrite {
 		unset( $this->search_structure );
 		unset( $this->feed_structure );
 		unset( $this->comment_feed_structure );
-		$this->use_trailing_slashes = ( '/' == substr( $this->permalink_structure, -1, 1 ) );
+
+		$this->use_trailing_slashes = ( '/' === substr( $this->permalink_structure, -1, 1 ) );
 
 		// Enable generic rules for pages if permalink structure doesn't begin with a wildcard.
 		if ( preg_match( '/^[^%]*%(?:postname|category|tag|author)%/', $this->permalink_structure ) ) {
diff --git a/wp-includes/class-wp-site-query.php b/wp-includes/class-wp-site-query.php
index f2cc1b788a..a14c48c855 100644
--- a/wp-includes/class-wp-site-query.php
+++ b/wp-includes/class-wp-site-query.php
@@ -297,7 +297,7 @@ class WP_Site_Query {
 		 *
 		 * The expected return type from this filter depends on the value passed in the request query_vars:
 		 * When `$this->query_vars['count']` is set, the filter should return the site count as an int.
-		 * When `'ids' == $this->query_vars['fields']`, the filter should return an array of site ids.
+		 * When `'ids' === $this->query_vars['fields']`, the filter should return an array of site ids.
 		 * Otherwise the filter should return an array of WP_Site objects.
 		 *
 		 * @since 5.2.0
@@ -353,7 +353,7 @@ class WP_Site_Query {
 
 		$site_ids = array_map( 'intval', $site_ids );
 
-		if ( 'ids' == $this->query_vars['fields'] ) {
+		if ( 'ids' === $this->query_vars['fields'] ) {
 			$this->sites = $site_ids;
 
 			return $this->sites;
diff --git a/wp-includes/class-wp-tax-query.php b/wp-includes/class-wp-tax-query.php
index cf4427e7d3..15349b78a9 100644
--- a/wp-includes/class-wp-tax-query.php
+++ b/wp-includes/class-wp-tax-query.php
@@ -400,7 +400,7 @@ class WP_Tax_Query {
 		$terms    = $clause['terms'];
 		$operator = strtoupper( $clause['operator'] );
 
-		if ( 'IN' == $operator ) {
+		if ( 'IN' === $operator ) {
 
 			if ( empty( $terms ) ) {
 				return self::$no_results;
@@ -430,7 +430,7 @@ class WP_Tax_Query {
 
 			$where = "$alias.term_taxonomy_id $operator ($terms)";
 
-		} elseif ( 'NOT IN' == $operator ) {
+		} elseif ( 'NOT IN' === $operator ) {
 
 			if ( empty( $terms ) ) {
 				return $sql;
@@ -444,7 +444,7 @@ class WP_Tax_Query {
 				WHERE term_taxonomy_id IN ($terms)
 			)";
 
-		} elseif ( 'AND' == $operator ) {
+		} elseif ( 'AND' === $operator ) {
 
 			if ( empty( $terms ) ) {
 				return $sql;
@@ -641,7 +641,7 @@ class WP_Tax_Query {
 			return;
 		}
 
-		if ( 'AND' == $query['operator'] && count( $term_list ) < count( $query['terms'] ) ) {
+		if ( 'AND' === $query['operator'] && count( $term_list ) < count( $query['terms'] ) ) {
 			$query = new WP_Error( 'inexistent_terms', __( 'Inexistent terms.' ) );
 			return;
 		}
diff --git a/wp-includes/class-wp-taxonomy.php b/wp-includes/class-wp-taxonomy.php
index 7cb35e9044..0ff90fb53e 100644
--- a/wp-includes/class-wp-taxonomy.php
+++ b/wp-includes/class-wp-taxonomy.php
@@ -299,7 +299,7 @@ final class WP_Taxonomy {
 			$args['query_var'] = false;
 		}
 
-		if ( false !== $args['rewrite'] && ( is_admin() || '' != get_option( 'permalink_structure' ) ) ) {
+		if ( false !== $args['rewrite'] && ( is_admin() || get_option( 'permalink_structure' ) ) ) {
 			$args['rewrite'] = wp_parse_args(
 				$args['rewrite'],
 				array(
@@ -400,7 +400,7 @@ final class WP_Taxonomy {
 			$wp->add_query_var( $this->query_var );
 		}
 
-		if ( false !== $this->rewrite && ( is_admin() || '' != get_option( 'permalink_structure' ) ) ) {
+		if ( false !== $this->rewrite && ( is_admin() || get_option( 'permalink_structure' ) ) ) {
 			if ( $this->hierarchical && $this->rewrite['hierarchical'] ) {
 				$tag = '(.+?)';
 			} else {
diff --git a/wp-includes/class-wp-term-query.php b/wp-includes/class-wp-term-query.php
index 1ef802ecbc..6d4844d173 100644
--- a/wp-includes/class-wp-term-query.php
+++ b/wp-includes/class-wp-term-query.php
@@ -253,7 +253,7 @@ class WP_Term_Query {
 			$query['child_of'] = false;
 		}
 
-		if ( 'all' == $query['get'] ) {
+		if ( 'all' === $query['get'] ) {
 			$query['childless']    = false;
 			$query['child_of']     = 0;
 			$query['hide_empty']   = 0;
@@ -341,7 +341,7 @@ class WP_Term_Query {
 			$args['child_of'] = false;
 		}
 
-		if ( 'all' == $args['get'] ) {
+		if ( 'all' === $args['get'] ) {
 			$args['childless']    = false;
 			$args['child_of']     = 0;
 			$args['hide_empty']   = 0;
@@ -382,7 +382,7 @@ class WP_Term_Query {
 			}
 
 			if ( ! $in_hierarchy ) {
-				if ( 'count' == $args['fields'] ) {
+				if ( 'count' === $args['fields'] ) {
 					return 0;
 				} else {
 					$this->terms = array();
@@ -545,7 +545,7 @@ class WP_Term_Query {
 		}
 
 		$hierarchical = $args['hierarchical'];
-		if ( 'count' == $args['fields'] ) {
+		if ( 'count' === $args['fields'] ) {
 			$hierarchical = false;
 		}
 		if ( $args['hide_empty'] && ! $hierarchical ) {
@@ -709,14 +709,15 @@ class WP_Term_Query {
 			return $this->terms;
 		}
 
-		if ( 'count' == $_fields ) {
+		if ( 'count' === $_fields ) {
 			$count = $wpdb->get_var( $this->request );
 			wp_cache_set( $cache_key, $count, 'terms' );
 			return $count;
 		}
 
 		$terms = $wpdb->get_results( $this->request );
-		if ( 'all' == $_fields || 'all_with_object_id' === $_fields ) {
+
+		if ( 'all' === $_fields || 'all_with_object_id' === $_fields ) {
 			update_term_cache( $terms );
 		}
 
@@ -741,7 +742,7 @@ class WP_Term_Query {
 		}
 
 		// Update term counts to include children.
-		if ( $args['pad_counts'] && 'all' == $_fields ) {
+		if ( $args['pad_counts'] && 'all' === $_fields ) {
 			foreach ( $taxonomies as $_tax ) {
 				_pad_term_counts( $terms, $_tax );
 			}
@@ -773,7 +774,7 @@ class WP_Term_Query {
 		 * `$fields` is 'all_with_object_id', but should otherwise be
 		 * removed.
 		 */
-		if ( ! empty( $args['object_ids'] ) && 'all_with_object_id' != $_fields ) {
+		if ( ! empty( $args['object_ids'] ) && 'all_with_object_id' !== $_fields ) {
 			$_tt_ids = array();
 			$_terms  = array();
 			foreach ( $terms as $term ) {
@@ -789,31 +790,31 @@ class WP_Term_Query {
 		}
 
 		$_terms = array();
-		if ( 'id=>parent' == $_fields ) {
+		if ( 'id=>parent' === $_fields ) {
 			foreach ( $terms as $term ) {
 				$_terms[ $term->term_id ] = $term->parent;
 			}
-		} elseif ( 'ids' == $_fields ) {
+		} elseif ( 'ids' === $_fields ) {
 			foreach ( $terms as $term ) {
 				$_terms[] = (int) $term->term_id;
 			}
-		} elseif ( 'tt_ids' == $_fields ) {
+		} elseif ( 'tt_ids' === $_fields ) {
 			foreach ( $terms as $term ) {
 				$_terms[] = (int) $term->term_taxonomy_id;
 			}
-		} elseif ( 'names' == $_fields ) {
+		} elseif ( 'names' === $_fields ) {
 			foreach ( $terms as $term ) {
 				$_terms[] = $term->name;
 			}
-		} elseif ( 'slugs' == $_fields ) {
+		} elseif ( 'slugs' === $_fields ) {
 			foreach ( $terms as $term ) {
 				$_terms[] = $term->slug;
 			}
-		} elseif ( 'id=>name' == $_fields ) {
+		} elseif ( 'id=>name' === $_fields ) {
 			foreach ( $terms as $term ) {
 				$_terms[ $term->term_id ] = $term->name;
 			}
-		} elseif ( 'id=>slug' == $_fields ) {
+		} elseif ( 'id=>slug' === $_fields ) {
 			foreach ( $terms as $term ) {
 				$_terms[ $term->term_id ] = $term->slug;
 			}
@@ -862,15 +863,15 @@ class WP_Term_Query {
 			$orderby = "tt.$_orderby";
 		} elseif ( 'term_order' === $_orderby ) {
 			$orderby = 'tr.term_order';
-		} elseif ( 'include' == $_orderby && ! empty( $this->query_vars['include'] ) ) {
+		} elseif ( 'include' === $_orderby && ! empty( $this->query_vars['include'] ) ) {
 			$include = implode( ',', wp_parse_id_list( $this->query_vars['include'] ) );
 			$orderby = "FIELD( t.term_id, $include )";
-		} elseif ( 'slug__in' == $_orderby && ! empty( $this->query_vars['slug'] ) && is_array( $this->query_vars['slug'] ) ) {
+		} elseif ( 'slug__in' === $_orderby && ! empty( $this->query_vars['slug'] ) && is_array( $this->query_vars['slug'] ) ) {
 			$slugs   = implode( "', '", array_map( 'sanitize_title_for_query', $this->query_vars['slug'] ) );
 			$orderby = "FIELD( t.slug, '" . $slugs . "')";
-		} elseif ( 'none' == $_orderby ) {
+		} elseif ( 'none' === $_orderby ) {
 			$orderby = '';
-		} elseif ( empty( $_orderby ) || 'id' == $_orderby || 'term_id' === $_orderby ) {
+		} elseif ( empty( $_orderby ) || 'id' === $_orderby || 'term_id' === $_orderby ) {
 			$orderby = 't.term_id';
 		} else {
 			$orderby = 't.name';
diff --git a/wp-includes/class-wp-theme.php b/wp-includes/class-wp-theme.php
index c38262e623..ca6359ec7e 100644
--- a/wp-includes/class-wp-theme.php
+++ b/wp-includes/class-wp-theme.php
@@ -340,7 +340,8 @@ final class WP_Theme implements ArrayAccess {
 			// wp-content/themes/directory-of-themes/*
 			$parent_dir  = dirname( $this->stylesheet );
 			$directories = search_theme_directories();
-			if ( '.' != $parent_dir && file_exists( $this->theme_root . '/' . $parent_dir . '/' . $this->template . '/index.php' ) ) {
+
+			if ( '.' !== $parent_dir && file_exists( $this->theme_root . '/' . $parent_dir . '/' . $this->template . '/index.php' ) ) {
 				$this->template = $parent_dir . '/' . $this->template;
 			} elseif ( $directories && isset( $directories[ $this->template ] ) ) {
 				// Look for the template in the search_theme_directories() results, in case it is in another theme root.
@@ -1142,7 +1143,7 @@ final class WP_Theme implements ArrayAccess {
 	public function get_screenshot( $uri = 'uri' ) {
 		$screenshot = $this->cache_get( 'screenshot' );
 		if ( $screenshot ) {
-			if ( 'relative' == $uri ) {
+			if ( 'relative' === $uri ) {
 				return $screenshot;
 			}
 			return $this->get_stylesheet_directory_uri() . '/' . $screenshot;
@@ -1153,7 +1154,7 @@ final class WP_Theme implements ArrayAccess {
 		foreach ( array( 'png', 'gif', 'jpg', 'jpeg' ) as $ext ) {
 			if ( file_exists( $this->get_stylesheet_directory() . "/screenshot.$ext" ) ) {
 				$this->cache_add( 'screenshot', 'screenshot.' . $ext );
-				if ( 'relative' == $uri ) {
+				if ( 'relative' === $uri ) {
 					return 'screenshot.' . $ext;
 				}
 				return $this->get_stylesheet_directory_uri() . '/' . 'screenshot.' . $ext;
@@ -1319,7 +1320,7 @@ final class WP_Theme implements ArrayAccess {
 		}
 
 		$relative_path = trailingslashit( $relative_path );
-		if ( '/' == $relative_path ) {
+		if ( '/' === $relative_path ) {
 			$relative_path = '';
 		}
 
@@ -1336,7 +1337,7 @@ final class WP_Theme implements ArrayAccess {
 		$exclusions = (array) apply_filters( 'theme_scandir_exclusions', array( 'CVS', 'node_modules', 'vendor', 'bower_components' ) );
 
 		foreach ( $results as $result ) {
-			if ( '.' == $result[0] || in_array( $result, $exclusions, true ) ) {
+			if ( '.' === $result[0] || in_array( $result, $exclusions, true ) ) {
 				continue;
 			}
 			if ( is_dir( $path . '/' . $result ) ) {
@@ -1407,14 +1408,14 @@ final class WP_Theme implements ArrayAccess {
 			return true;
 		}
 
-		if ( 'both' == $check || 'network' == $check ) {
+		if ( 'both' === $check || 'network' === $check ) {
 			$allowed = self::get_allowed_on_network();
 			if ( ! empty( $allowed[ $this->get_stylesheet() ] ) ) {
 				return true;
 			}
 		}
 
-		if ( 'both' == $check || 'site' == $check ) {
+		if ( 'both' === $check || 'site' === $check ) {
 			$allowed = self::get_allowed_on_site( $blog_id );
 			if ( ! empty( $allowed[ $this->get_stylesheet() ] ) ) {
 				return true;
diff --git a/wp-includes/class-wp-user-query.php b/wp-includes/class-wp-user-query.php
index 617773c3ae..02b0ff3814 100644
--- a/wp-includes/class-wp-user-query.php
+++ b/wp-includes/class-wp-user-query.php
@@ -242,7 +242,7 @@ class WP_User_Query {
 				$this->query_fields[] = "$wpdb->users.$field";
 			}
 			$this->query_fields = implode( ',', $this->query_fields );
-		} elseif ( 'all' == $qv['fields'] ) {
+		} elseif ( 'all' === $qv['fields'] ) {
 			$this->query_fields = "$wpdb->users.*";
 		} else {
 			$this->query_fields = "$wpdb->users.ID";
@@ -320,7 +320,7 @@ class WP_User_Query {
 		$this->meta_query = new WP_Meta_Query();
 		$this->meta_query->parse_query_vars( $qv );
 
-		if ( isset( $qv['who'] ) && 'authors' == $qv['who'] && $blog_id ) {
+		if ( isset( $qv['who'] ) && 'authors' === $qv['who'] && $blog_id ) {
 			$who_query = array(
 				'key'     => $wpdb->get_blog_prefix( $blog_id ) . 'user_level',
 				'value'   => 0,
@@ -614,7 +614,7 @@ class WP_User_Query {
 		if ( null === $this->results ) {
 			$this->request = "SELECT $this->query_fields $this->query_from $this->query_where $this->query_orderby $this->query_limit";
 
-			if ( is_array( $qv['fields'] ) || 'all' == $qv['fields'] ) {
+			if ( is_array( $qv['fields'] ) || 'all' === $qv['fields'] ) {
 				$this->results = $wpdb->get_results( $this->request );
 			} else {
 				$this->results = $wpdb->get_col( $this->request );
@@ -642,7 +642,7 @@ class WP_User_Query {
 			return;
 		}
 
-		if ( 'all_with_meta' == $qv['fields'] ) {
+		if ( 'all_with_meta' === $qv['fields'] ) {
 			cache_users( $this->results );
 
 			$r = array();
@@ -651,7 +651,7 @@ class WP_User_Query {
 			}
 
 			$this->results = $r;
-		} elseif ( 'all' == $qv['fields'] ) {
+		} elseif ( 'all' === $qv['fields'] ) {
 			foreach ( $this->results as $key => $user ) {
 				$this->results[ $key ] = new WP_User( $user, '', $qv['blog_id'] );
 			}
@@ -703,12 +703,12 @@ class WP_User_Query {
 		global $wpdb;
 
 		$searches      = array();
-		$leading_wild  = ( 'leading' == $wild || 'both' == $wild ) ? '%' : '';
-		$trailing_wild = ( 'trailing' == $wild || 'both' == $wild ) ? '%' : '';
+		$leading_wild  = ( 'leading' === $wild || 'both' === $wild ) ? '%' : '';
+		$trailing_wild = ( 'trailing' === $wild || 'both' === $wild ) ? '%' : '';
 		$like          = $leading_wild . $wpdb->esc_like( $string ) . $trailing_wild;
 
 		foreach ( $cols as $col ) {
-			if ( 'ID' == $col ) {
+			if ( 'ID' === $col ) {
 				$searches[] = $wpdb->prepare( "$col = %s", $string );
 			} else {
 				$searches[] = $wpdb->prepare( "$col LIKE %s", $like );
@@ -760,9 +760,9 @@ class WP_User_Query {
 			$_orderby = 'user_' . $orderby;
 		} elseif ( in_array( $orderby, array( 'user_login', 'user_nicename', 'user_email', 'user_url', 'user_registered' ), true ) ) {
 			$_orderby = $orderby;
-		} elseif ( 'name' == $orderby || 'display_name' == $orderby ) {
+		} elseif ( 'name' === $orderby || 'display_name' === $orderby ) {
 			$_orderby = 'display_name';
-		} elseif ( 'post_count' == $orderby ) {
+		} elseif ( 'post_count' === $orderby ) {
 			// @todo Avoid the JOIN.
 			$where             = get_posts_by_author_sql( 'post' );
 			$this->query_from .= " LEFT OUTER JOIN (
@@ -773,11 +773,11 @@ class WP_User_Query {
 			) p ON ({$wpdb->users}.ID = p.post_author)
 			";
 			$_orderby          = 'post_count';
-		} elseif ( 'ID' == $orderby || 'id' == $orderby ) {
+		} elseif ( 'ID' === $orderby || 'id' === $orderby ) {
 			$_orderby = 'ID';
-		} elseif ( 'meta_value' == $orderby || $this->get( 'meta_key' ) == $orderby ) {
+		} elseif ( 'meta_value' === $orderby || $this->get( 'meta_key' ) == $orderby ) {
 			$_orderby = "$wpdb->usermeta.meta_value";
-		} elseif ( 'meta_value_num' == $orderby ) {
+		} elseif ( 'meta_value_num' === $orderby ) {
 			$_orderby = "$wpdb->usermeta.meta_value+0";
 		} elseif ( 'include' === $orderby && ! empty( $this->query_vars['include'] ) ) {
 			$include     = wp_parse_id_list( $this->query_vars['include'] );
diff --git a/wp-includes/class-wp-user.php b/wp-includes/class-wp-user.php
index a7ff4e6974..abb56b05a0 100644
--- a/wp-includes/class-wp-user.php
+++ b/wp-includes/class-wp-user.php
@@ -192,7 +192,7 @@ class WP_User {
 			$field = 'id';
 		}
 
-		if ( 'id' == $field ) {
+		if ( 'id' === $field ) {
 			// Make sure the value is numeric to avoid casting objects, for example,
 			// to int 1.
 			if ( ! is_numeric( $value ) ) {
@@ -263,7 +263,7 @@ class WP_User {
 	 * @return bool Whether the given user meta key is set.
 	 */
 	public function __isset( $key ) {
-		if ( 'id' == $key ) {
+		if ( 'id' === $key ) {
 			_deprecated_argument(
 				'WP_User->id',
 				'2.1.0',
@@ -296,7 +296,7 @@ class WP_User {
 	 * @return mixed Value of the given user meta key (if set). If `$key` is 'id', the user ID.
 	 */
 	public function __get( $key ) {
-		if ( 'id' == $key ) {
+		if ( 'id' === $key ) {
 			_deprecated_argument(
 				'WP_User->id',
 				'2.1.0',
@@ -337,7 +337,7 @@ class WP_User {
 	 * @param mixed  $value User meta value.
 	 */
 	public function __set( $key, $value ) {
-		if ( 'id' == $key ) {
+		if ( 'id' === $key ) {
 			_deprecated_argument(
 				'WP_User->id',
 				'2.1.0',
@@ -362,7 +362,7 @@ class WP_User {
 	 * @param string $key User meta key to unset.
 	 */
 	public function __unset( $key ) {
-		if ( 'id' == $key ) {
+		if ( 'id' === $key ) {
 			_deprecated_argument(
 				'WP_User->id',
 				'2.1.0',
diff --git a/wp-includes/class-wp-xmlrpc-server.php b/wp-includes/class-wp-xmlrpc-server.php
index 5a32694129..6e74bf6ca5 100644
--- a/wp-includes/class-wp-xmlrpc-server.php
+++ b/wp-includes/class-wp-xmlrpc-server.php
@@ -1131,7 +1131,7 @@ class wp_xmlrpc_server extends IXR_Server {
 
 		if ( '0' == $comment->comment_approved ) {
 			$comment_status = 'hold';
-		} elseif ( 'spam' == $comment->comment_approved ) {
+		} elseif ( 'spam' === $comment->comment_approved ) {
 			$comment_status = 'spam';
 		} elseif ( '1' == $comment->comment_approved ) {
 			$comment_status = 'approve';
@@ -3379,7 +3379,7 @@ class wp_xmlrpc_server extends IXR_Server {
 
 		$cat_id = wp_insert_category( $new_category, true );
 		if ( is_wp_error( $cat_id ) ) {
-			if ( 'term_exists' == $cat_id->get_error_code() ) {
+			if ( 'term_exists' === $cat_id->get_error_code() ) {
 				return (int) $cat_id->get_error_data();
 			} else {
 				return new IXR_Error( 500, __( 'Sorry, the category could not be created.' ) );
@@ -3912,7 +3912,7 @@ class wp_xmlrpc_server extends IXR_Server {
 			$comment['user_ID'] = 0;
 
 			if ( get_option( 'require_name_email' ) ) {
-				if ( 6 > strlen( $comment['comment_author_email'] ) || '' == $comment['comment_author'] ) {
+				if ( strlen( $comment['comment_author_email'] < 6 ) || '' === $comment['comment_author'] ) {
 					return new IXR_Error( 403, __( 'Comment author name and email are required.' ) );
 				} elseif ( ! is_email( $comment['comment_author_email'] ) ) {
 					return new IXR_Error( 403, __( 'A valid email address is required.' ) );
@@ -5720,7 +5720,7 @@ class wp_xmlrpc_server extends IXR_Server {
 		}
 
 		$page_template = null;
-		if ( ! empty( $content_struct['wp_page_template'] ) && 'page' == $post_type ) {
+		if ( ! empty( $content_struct['wp_page_template'] ) && 'page' === $post_type ) {
 			$page_template = $content_struct['wp_page_template'];
 		}
 
@@ -5847,7 +5847,7 @@ class wp_xmlrpc_server extends IXR_Server {
 		$tags_input = isset( $content_struct['mt_keywords'] ) ? $content_struct['mt_keywords'] : null;
 
 		if ( 'publish' === $post_status || 'private' === $post_status ) {
-			if ( 'page' == $post_type && ! current_user_can( 'publish_pages' ) ) {
+			if ( 'page' === $post_type && ! current_user_can( 'publish_pages' ) ) {
 				return new IXR_Error( 401, __( 'Sorry, you are not allowed to publish this page.' ) );
 			} elseif ( ! current_user_can( 'publish_posts' ) ) {
 				return new IXR_Error( 401, __( 'Sorry, you are not allowed to publish this post.' ) );
@@ -5991,7 +5991,7 @@ class wp_xmlrpc_server extends IXR_Server {
 		/** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
 		do_action( 'xmlrpc_call', 'metaWeblog.getPost' );
 
-		if ( '' != $postdata['post_date'] ) {
+		if ( '' !== $postdata['post_date'] ) {
 			$post_date         = $this->_convert_date( $postdata['post_date'] );
 			$post_date_gmt     = $this->_convert_date_gmt( $postdata['post_date_gmt'], $postdata['post_date'] );
 			$post_modified     = $this->_convert_date( $postdata['post_modified'] );
@@ -6020,8 +6020,8 @@ class wp_xmlrpc_server extends IXR_Server {
 			// Get the author info.
 			$author = get_userdata( $postdata['post_author'] );
 
-			$allow_comments = ( 'open' == $postdata['comment_status'] ) ? 1 : 0;
-			$allow_pings    = ( 'open' == $postdata['ping_status'] ) ? 1 : 0;
+			$allow_comments = ( 'open' === $postdata['comment_status'] ) ? 1 : 0;
+			$allow_pings    = ( 'open' === $postdata['ping_status'] ) ? 1 : 0;
 
 			// Consider future posts as published.
 			if ( 'future' === $postdata['post_status'] ) {
@@ -6172,8 +6172,8 @@ class wp_xmlrpc_server extends IXR_Server {
 			// Get the post author info.
 			$author = get_userdata( $entry['post_author'] );
 
-			$allow_comments = ( 'open' == $entry['comment_status'] ) ? 1 : 0;
-			$allow_pings    = ( 'open' == $entry['ping_status'] ) ? 1 : 0;
+			$allow_comments = ( 'open' === $entry['comment_status'] ) ? 1 : 0;
+			$allow_pings    = ( 'open' === $entry['ping_status'] ) ? 1 : 0;
 
 			// Consider future posts as published.
 			if ( 'future' === $entry['post_status'] ) {
@@ -6681,7 +6681,7 @@ class wp_xmlrpc_server extends IXR_Server {
 
 		$trackback_pings = array();
 		foreach ( $comments as $comment ) {
-			if ( 'trackback' == $comment->comment_type ) {
+			if ( 'trackback' === $comment->comment_type ) {
 				$content           = $comment->comment_content;
 				$title             = substr( $content, 8, ( strpos( $content, '</strong>' ) - 8 ) );
 				$trackback_pings[] = array(
@@ -7028,7 +7028,7 @@ class wp_xmlrpc_server extends IXR_Server {
 
 		$pingbacks = array();
 		foreach ( $comments as $comment ) {
-			if ( 'pingback' == $comment->comment_type ) {
+			if ( 'pingback' === $comment->comment_type ) {
 				$pingbacks[] = $comment->comment_author_url;
 			}
 		}
diff --git a/wp-includes/class-wp.php b/wp-includes/class-wp.php
index ba1f15d033..0d6268fe08 100644
--- a/wp-includes/class-wp.php
+++ b/wp-includes/class-wp.php
@@ -420,7 +420,7 @@ class WP {
 		} else {
 			// Set the correct content type for feeds.
 			$type = $this->query_vars['feed'];
-			if ( 'feed' == $this->query_vars['feed'] ) {
+			if ( 'feed' === $this->query_vars['feed'] ) {
 				$type = get_default_feed();
 			}
 			$headers['Content-Type'] = feed_content_type( $type ) . '; charset=' . get_option( 'blog_charset' );
diff --git a/wp-includes/comment-template.php b/wp-includes/comment-template.php
index 2048dccdfa..d792bffd9c 100644
--- a/wp-includes/comment-template.php
+++ b/wp-includes/comment-template.php
@@ -193,7 +193,7 @@ function get_comment_author_email_link( $linktext = '', $before = '', $after = '
 	$email = apply_filters( 'comment_email', $comment->comment_author_email, $comment );
 
 	if ( ( ! empty( $email ) ) && ( '@' !== $email ) ) {
-		$display = ( '' != $linktext ) ? $linktext : $email;
+		$display = ( '' !== $linktext ) ? $linktext : $email;
 		$return  = $before;
 		$return .= sprintf( '<a href="%1$s">%2$s</a>', esc_url( 'mailto:' . $email ), esc_html( $display ) );
 		$return .= $after;
@@ -221,7 +221,7 @@ function get_comment_author_link( $comment_ID = 0 ) {
 	$url     = get_comment_author_url( $comment );
 	$author  = get_comment_author( $comment );
 
-	if ( empty( $url ) || 'http://' == $url ) {
+	if ( empty( $url ) || 'http://' === $url ) {
 		$return = $author;
 	} else {
 		$return = "<a href='$url' rel='external nofollow ugc' class='url'>$author</a>";
@@ -308,7 +308,7 @@ function get_comment_author_url( $comment_ID = 0 ) {
 	$url     = '';
 	$id      = 0;
 	if ( ! empty( $comment ) ) {
-		$author_url = ( 'http://' == $comment->comment_author_url ) ? '' : $comment->comment_author_url;
+		$author_url = ( 'http://' === $comment->comment_author_url ) ? '' : $comment->comment_author_url;
 		$url        = esc_url( $author_url, array( 'http', 'https' ) );
 		$id         = $comment->comment_ID;
 	}
@@ -376,11 +376,11 @@ function comment_author_url( $comment_ID = 0 ) {
  */
 function get_comment_author_url_link( $linktext = '', $before = '', $after = '', $comment = 0 ) {
 	$url     = get_comment_author_url( $comment );
-	$display = ( '' != $linktext ) ? $linktext : $url;
+	$display = ( '' !== $linktext ) ? $linktext : $url;
 	$display = str_replace( 'http://www.', '', $display );
 	$display = str_replace( 'http://', '', $display );
 
-	if ( '/' == substr( $display, -1 ) ) {
+	if ( '/' === substr( $display, -1 ) ) {
 		$display = substr( $display, 0, -1 );
 	}
 
@@ -550,11 +550,13 @@ function get_comment_class( $class = '', $comment_id = null, $post_id = null ) {
  */
 function get_comment_date( $format = '', $comment_ID = 0 ) {
 	$comment = get_comment( $comment_ID );
-	if ( '' == $format ) {
+
+	if ( '' === $format ) {
 		$date = mysql2date( get_option( 'date_format' ), $comment->comment_date );
 	} else {
 		$date = mysql2date( $format, $comment->comment_date );
 	}
+
 	/**
 	 * Filters the returned comment date.
 	 *
@@ -1037,7 +1039,8 @@ function get_comment_time( $format = '', $gmt = false, $translate = true ) {
 	$comment = get_comment();
 
 	$comment_date = $gmt ? $comment->comment_date_gmt : $comment->comment_date;
-	if ( '' == $format ) {
+
+	if ( '' === $format ) {
 		$date = mysql2date( get_option( 'time_format' ), $comment_date, $translate );
 	} else {
 		$date = mysql2date( $format, $comment_date, $translate );
@@ -1080,7 +1083,8 @@ function comment_time( $format = '' ) {
  */
 function get_comment_type( $comment_ID = 0 ) {
 	$comment = get_comment( $comment_ID );
-	if ( '' == $comment->comment_type ) {
+
+	if ( '' === $comment->comment_type ) {
 		$comment->comment_type = 'comment';
 	}
 
@@ -1141,7 +1145,7 @@ function comment_type( $commenttxt = false, $trackbacktxt = false, $pingbacktxt
  * @return string The trackback URL after being filtered.
  */
 function get_trackback_url() {
-	if ( '' != get_option( 'permalink_structure' ) ) {
+	if ( get_option( 'permalink_structure' ) ) {
 		$tb_url = trailingslashit( get_permalink() ) . user_trailingslashit( 'trackback', 'single_trackback' );
 	} else {
 		$tb_url = get_option( 'siteurl' ) . '/wp-trackback.php?p=' . get_the_ID();
@@ -1235,7 +1239,7 @@ function comments_open( $post_id = null ) {
 	$_post = get_post( $post_id );
 
 	$post_id = $_post ? $_post->ID : 0;
-	$open    = ( 'open' == $_post->comment_status );
+	$open    = ( 'open' === $_post->comment_status );
 
 	/**
 	 * Filters whether the current post is open for comments.
@@ -1265,7 +1269,7 @@ function pings_open( $post_id = null ) {
 	$_post = get_post( $post_id );
 
 	$post_id = $_post ? $_post->ID : 0;
-	$open    = ( 'open' == $_post->ping_status );
+	$open    = ( 'open' === $_post->ping_status );
 
 	/**
 	 * Filters whether the current post is open for pings.
@@ -1505,8 +1509,9 @@ function comments_template( $file = '/comments.php', $separate_comments = false
 	}
 
 	$overridden_cpage = false;
+
 	if ( '' == get_query_var( 'cpage' ) && $wp_query->max_num_comment_pages > 1 ) {
-		set_query_var( 'cpage', 'newest' == get_option( 'default_comments_page' ) ? get_comment_pages_count() : 1 );
+		set_query_var( 'cpage', 'newest' === get_option( 'default_comments_page' ) ? get_comment_pages_count() : 1 );
 		$overridden_cpage = true;
 	}
 
@@ -1515,6 +1520,7 @@ function comments_template( $file = '/comments.php', $separate_comments = false
 	}
 
 	$theme_template = STYLESHEETPATH . $file;
+
 	/**
 	 * Filters the path to the theme template file used for the comments template.
 	 *
@@ -1523,6 +1529,7 @@ function comments_template( $file = '/comments.php', $separate_comments = false
 	 * @param string $theme_template The path to the theme template file.
 	 */
 	$include = apply_filters( 'comments_template', $theme_template );
+
 	if ( file_exists( $include ) ) {
 		require $include;
 	} elseif ( file_exists( TEMPLATEPATH . $file ) ) {
@@ -2060,7 +2067,7 @@ function wp_list_comments( $args = array(), $comments = null ) {
 		if ( empty( $comments ) ) {
 			return;
 		}
-		if ( 'all' != $parsed_args['type'] ) {
+		if ( 'all' !== $parsed_args['type'] ) {
 			$comments_by_type = separate_comments( $comments );
 			if ( empty( $comments_by_type[ $parsed_args['type'] ] ) ) {
 				return;
@@ -2101,7 +2108,7 @@ function wp_list_comments( $args = array(), $comments = null ) {
 
 				$comments = get_comments( $comment_args );
 
-				if ( 'all' != $parsed_args['type'] ) {
+				if ( 'all' !== $parsed_args['type'] ) {
 					$comments_by_type = separate_comments( $comments );
 					if ( empty( $comments_by_type[ $parsed_args['type'] ] ) ) {
 						return;
@@ -2118,7 +2125,7 @@ function wp_list_comments( $args = array(), $comments = null ) {
 			if ( empty( $wp_query->comments ) ) {
 				return;
 			}
-			if ( 'all' != $parsed_args['type'] ) {
+			if ( 'all' !== $parsed_args['type'] ) {
 				if ( empty( $wp_query->comments_by_type ) ) {
 					$wp_query->comments_by_type = separate_comments( $wp_query->comments );
 				}
@@ -2174,7 +2181,7 @@ function wp_list_comments( $args = array(), $comments = null ) {
 			$parsed_args['page'] = get_query_var( 'cpage' );
 		} else {
 			$threaded            = ( -1 != $parsed_args['max_depth'] );
-			$parsed_args['page'] = ( 'newest' == get_option( 'default_comments_page' ) ) ? get_comment_pages_count( $_comments, $parsed_args['per_page'], $threaded ) : 1;
+			$parsed_args['page'] = ( 'newest' === get_option( 'default_comments_page' ) ) ? get_comment_pages_count( $_comments, $parsed_args['per_page'], $threaded ) : 1;
 			set_query_var( 'cpage', $parsed_args['page'] );
 		}
 	}
@@ -2185,7 +2192,7 @@ function wp_list_comments( $args = array(), $comments = null ) {
 	}
 
 	if ( null === $parsed_args['reverse_top_level'] ) {
-		$parsed_args['reverse_top_level'] = ( 'desc' == get_option( 'comment_order' ) );
+		$parsed_args['reverse_top_level'] = ( 'desc' === get_option( 'comment_order' ) );
 	}
 
 	wp_queue_comments_for_comment_meta_lazyload( $_comments );
diff --git a/wp-includes/comment.php b/wp-includes/comment.php
index 8648a89a0f..a57cf275f8 100644
--- a/wp-includes/comment.php
+++ b/wp-includes/comment.php
@@ -127,7 +127,7 @@ function check_comment( $author, $email, $url, $comment, $user_ip, $user_agent,
 	 * email address. If both checks pass, return true. Otherwise, return false.
 	 */
 	if ( 1 == get_option( 'comment_whitelist' ) ) {
-		if ( 'trackback' !== $comment_type && 'pingback' !== $comment_type && '' != $author && '' != $email ) {
+		if ( 'trackback' !== $comment_type && 'pingback' !== $comment_type && '' !== $author && '' !== $email ) {
 			$comment_user = get_user_by( 'email', wp_unslash( $email ) );
 			if ( ! empty( $comment_user->ID ) ) {
 				$ok_to_comment = $wpdb->get_var( $wpdb->prepare( "SELECT comment_approved FROM $wpdb->comments WHERE user_id = %d AND comment_approved = '1' LIMIT 1", $comment_user->ID ) );
@@ -963,14 +963,19 @@ function separate_comments( &$comments ) {
 		'pingback'  => array(),
 		'pings'     => array(),
 	);
-	$count            = count( $comments );
+
+	$count = count( $comments );
+
 	for ( $i = 0; $i < $count; $i++ ) {
 		$type = $comments[ $i ]->comment_type;
+
 		if ( empty( $type ) ) {
 			$type = 'comment';
 		}
+
 		$comments_by_type[ $type ][] = &$comments[ $i ];
-		if ( 'trackback' == $type || 'pingback' == $type ) {
+
+		if ( 'trackback' === $type || 'pingback' === $type ) {
 			$comments_by_type['pings'][] = &$comments[ $i ];
 		}
 	}
@@ -1281,7 +1286,7 @@ function wp_blacklist_check( $author, $email, $url, $comment, $user_ip, $user_ag
 	do_action( 'wp_blacklist_check', $author, $email, $url, $comment, $user_ip, $user_agent );
 
 	$mod_keys = trim( get_option( 'blacklist_keys' ) );
-	if ( '' == $mod_keys ) {
+	if ( '' === $mod_keys ) {
 		return false; // If moderation keys are empty.
 	}
 
@@ -1671,9 +1676,9 @@ function wp_get_comment_status( $comment_id ) {
 		return 'approved';
 	} elseif ( '0' == $approved ) {
 		return 'unapproved';
-	} elseif ( 'spam' == $approved ) {
+	} elseif ( 'spam' === $approved ) {
 		return 'spam';
-	} elseif ( 'trash' == $approved ) {
+	} elseif ( 'trash' === $approved ) {
 		return 'trash';
 	} else {
 		return false;
@@ -2114,8 +2119,10 @@ function wp_new_comment( $commentdata, $avoid_die = false ) {
 	}
 
 	$commentdata['comment_parent'] = isset( $commentdata['comment_parent'] ) ? absint( $commentdata['comment_parent'] ) : 0;
-	$parent_status                 = ( 0 < $commentdata['comment_parent'] ) ? wp_get_comment_status( $commentdata['comment_parent'] ) : '';
-	$commentdata['comment_parent'] = ( 'approved' == $parent_status || 'unapproved' == $parent_status ) ? $commentdata['comment_parent'] : 0;
+
+	$parent_status = ( $commentdata['comment_parent'] > 0 ) ? wp_get_comment_status( $commentdata['comment_parent'] ) : '';
+
+	$commentdata['comment_parent'] = ( 'approved' === $parent_status || 'unapproved' === $parent_status ) ? $commentdata['comment_parent'] : 0;
 
 	if ( ! isset( $commentdata['comment_author_IP'] ) ) {
 		$commentdata['comment_author_IP'] = $_SERVER['REMOTE_ADDR'];
@@ -2375,9 +2382,9 @@ function wp_update_comment( $commentarr ) {
 
 	if ( ! isset( $data['comment_approved'] ) ) {
 		$data['comment_approved'] = 1;
-	} elseif ( 'hold' == $data['comment_approved'] ) {
+	} elseif ( 'hold' === $data['comment_approved'] ) {
 		$data['comment_approved'] = 0;
-	} elseif ( 'approve' == $data['comment_approved'] ) {
+	} elseif ( 'approve' === $data['comment_approved'] ) {
 		$data['comment_approved'] = 1;
 	}
 
@@ -2800,7 +2807,7 @@ function generic_ping( $post_id = 0 ) {
 	$services = explode( "\n", $services );
 	foreach ( (array) $services as $service ) {
 		$service = trim( $service );
-		if ( '' != $service ) {
+		if ( '' !== $service ) {
 			weblog_ping( $service );
 		}
 	}
@@ -2985,7 +2992,7 @@ function weblog_ping( $server = '', $path = '' ) {
 	include_once ABSPATH . WPINC . '/class-wp-http-ixr-client.php';
 
 	// Using a timeout of 3 seconds should be enough to cover slow servers.
-	$client             = new WP_HTTP_IXR_Client( $server, ( ( ! strlen( trim( $path ) ) || ( '/' == $path ) ) ? false : $path ) );
+	$client             = new WP_HTTP_IXR_Client( $server, ( ( ! strlen( trim( $path ) ) || ( '/' === $path ) ) ? false : $path ) );
 	$client->timeout    = 3;
 	$client->useragent .= ' -- WordPress/' . get_bloginfo( 'version' );
 
@@ -3266,7 +3273,7 @@ function wp_handle_comment_submission( $comment_data ) {
 	// get_post_status() will get the parent status for attachments.
 	$status = get_post_status( $post );
 
-	if ( ( 'private' == $status ) && ! current_user_can( 'read_post', $comment_post_ID ) ) {
+	if ( ( 'private' === $status ) && ! current_user_can( 'read_post', $comment_post_ID ) ) {
 		return new WP_Error( 'comment_id_not_found' );
 	}
 
@@ -3285,7 +3292,7 @@ function wp_handle_comment_submission( $comment_data ) {
 
 		return new WP_Error( 'comment_closed', __( 'Sorry, comments are closed for this item.' ), 403 );
 
-	} elseif ( 'trash' == $status ) {
+	} elseif ( 'trash' === $status ) {
 
 		/**
 		 * Fires when a comment is attempted on a trashed post.
diff --git a/wp-includes/feed.php b/wp-includes/feed.php
index 41bb04c288..3ac76955e1 100644
--- a/wp-includes/feed.php
+++ b/wp-includes/feed.php
@@ -85,7 +85,8 @@ function get_default_feed() {
 	 *                          Default 'rss2'.
 	 */
 	$default_feed = apply_filters( 'default_feed', 'rss2' );
-	return 'rss' == $default_feed ? 'rss2' : $default_feed;
+
+	return ( 'rss' === $default_feed ) ? 'rss2' : $default_feed;
 }
 
 /**
@@ -160,8 +161,7 @@ function get_the_title_rss() {
 	 *
 	 * @param string $title The current post title.
 	 */
-	$title = apply_filters( 'the_title_rss', $title );
-	return $title;
+	return apply_filters( 'the_title_rss', $title );
 }
 
 /**
@@ -190,6 +190,7 @@ function get_the_content_feed( $feed_type = null ) {
 	/** This filter is documented in wp-includes/post-template.php */
 	$content = apply_filters( 'the_content', get_the_content() );
 	$content = str_replace( ']]>', ']]&gt;', $content );
+
 	/**
 	 * Filters the post content for use in feeds.
 	 *
@@ -382,7 +383,7 @@ function get_the_category_rss( $type = null ) {
 	$cat_names  = array();
 
 	$filter = 'rss';
-	if ( 'atom' == $type ) {
+	if ( 'atom' === $type ) {
 		$filter = 'raw';
 	}
 
@@ -401,9 +402,9 @@ function get_the_category_rss( $type = null ) {
 	$cat_names = array_unique( $cat_names );
 
 	foreach ( $cat_names as $cat_name ) {
-		if ( 'rdf' == $type ) {
+		if ( 'rdf' === $type ) {
 			$the_list .= "\t\t<dc:subject><![CDATA[$cat_name]]></dc:subject>\n";
-		} elseif ( 'atom' == $type ) {
+		} elseif ( 'atom' === $type ) {
 			$the_list .= sprintf( '<category scheme="%1$s" term="%2$s" />', esc_attr( get_bloginfo_rss( 'url' ) ), esc_attr( $cat_name ) );
 		} else {
 			$the_list .= "\t\t<category><![CDATA[" . html_entity_decode( $cat_name, ENT_COMPAT, get_option( 'blog_charset' ) ) . "]]></category>\n";
diff --git a/wp-includes/formatting.php b/wp-includes/formatting.php
index c29c14874e..7b79a6863a 100644
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -379,7 +379,7 @@ function wptexturize_primes( $haystack, $needle, $prime, $open_quote, $close_quo
 			$sentence = preg_replace( $prime_pattern, $prime, $sentence );
 			$sentence = preg_replace( $quote_pattern, $close_quote, $sentence );
 		}
-		if ( '"' == $needle && false !== strpos( $sentence, '"' ) ) {
+		if ( '"' === $needle && false !== strpos( $sentence, '"' ) ) {
 			$sentence = str_replace( '"', $close_quote, $sentence );
 		}
 	}
@@ -1938,7 +1938,7 @@ function remove_accents( $string ) {
 		// Used for locale-specific rules.
 		$locale = get_locale();
 
-		if ( 'de_DE' == $locale || 'de_DE_formal' == $locale || 'de_CH' == $locale || 'de_CH_informal' == $locale ) {
+		if ( in_array( $locale, array( 'de_DE', 'de_DE_formal', 'de_CH', 'de_CH_informal' ), true ) ) {
 			$chars['Ä'] = 'Ae';
 			$chars['ä'] = 'ae';
 			$chars['Ö'] = 'Oe';
@@ -2179,7 +2179,7 @@ function sanitize_key( $key ) {
 function sanitize_title( $title, $fallback_title = '', $context = 'save' ) {
 	$raw_title = $title;
 
-	if ( 'save' == $context ) {
+	if ( 'save' === $context ) {
 		$title = remove_accents( $title );
 	}
 
@@ -2246,7 +2246,7 @@ function sanitize_title_with_dashes( $title, $raw_title = '', $context = 'displa
 
 	$title = strtolower( $title );
 
-	if ( 'save' == $context ) {
+	if ( 'save' === $context ) {
 		// Convert &nbsp, &ndash, and &mdash to hyphens.
 		$title = str_replace( array( '%c2%a0', '%e2%80%93', '%e2%80%94' ), '-', $title );
 		// Convert &nbsp, &ndash, and &mdash HTML entities to hyphens.
@@ -2354,7 +2354,7 @@ function sanitize_html_class( $class, $fallback = '' ) {
 	// Limit to A-Z, a-z, 0-9, '_', '-'.
 	$sanitized = preg_replace( '/[^A-Za-z0-9_-]/', '', $sanitized );
 
-	if ( '' == $sanitized && $fallback ) {
+	if ( '' === $sanitized && $fallback ) {
 		return sanitize_html_class( $fallback );
 	}
 	/**
@@ -2836,7 +2836,7 @@ function antispambot( $email_address, $hex_encoding = 0 ) {
 function _make_url_clickable_cb( $matches ) {
 	$url = $matches[2];
 
-	if ( ')' == $matches[3] && strpos( $url, '(' ) ) {
+	if ( ')' === $matches[3] && strpos( $url, '(' ) ) {
 		// If the trailing character is a closing parethesis, and the URL has an opening parenthesis in it,
 		// add the closing parenthesis to the URL. Then we can let the parenthesis balancer do its thing below.
 		$url   .= $matches[3];
@@ -3370,17 +3370,17 @@ function convert_smilies( $text ) {
 			$content = $textarr[ $i ];
 
 			// If we're in an ignore block, wait until we find its closing tag.
-			if ( '' == $ignore_block_element && preg_match( '/^<(' . $tags_to_ignore . ')[^>]*>/', $content, $matches ) ) {
+			if ( '' === $ignore_block_element && preg_match( '/^<(' . $tags_to_ignore . ')[^>]*>/', $content, $matches ) ) {
 				$ignore_block_element = $matches[1];
 			}
 
 			// If it's not a tag and not in ignore block.
-			if ( '' == $ignore_block_element && strlen( $content ) > 0 && '<' != $content[0] ) {
+			if ( '' === $ignore_block_element && strlen( $content ) > 0 && '<' !== $content[0] ) {
 				$content = preg_replace_callback( $wp_smiliessearch, 'translate_smiley', $content );
 			}
 
 			// Did we exit ignore block?
-			if ( '' != $ignore_block_element && '</' . $ignore_block_element . '>' == $content ) {
+			if ( '' !== $ignore_block_element && '</' . $ignore_block_element . '>' === $content ) {
 				$ignore_block_element = '';
 			}
 
@@ -3573,7 +3573,7 @@ function iso8601_timezone_to_offset( $timezone ) {
 	if ( 'Z' === $timezone ) {
 		$offset = 0;
 	} else {
-		$sign    = ( substr( $timezone, 0, 1 ) == '+' ) ? 1 : -1;
+		$sign    = ( '+' === substr( $timezone, 0, 1 ) ) ? 1 : -1;
 		$hours   = intval( substr( $timezone, 1, 2 ) );
 		$minutes = intval( substr( $timezone, 3, 4 ) ) / 60;
 		$offset  = $sign * HOUR_IN_SECONDS * ( $hours + $minutes );
@@ -3813,7 +3813,8 @@ function human_time_diff( $from, $to = 0 ) {
  */
 function wp_trim_excerpt( $text = '', $post = null ) {
 	$raw_excerpt = $text;
-	if ( '' == $text ) {
+
+	if ( '' === $text ) {
 		$post = get_post( $post );
 		$text = get_the_content( '', false, $post );
 
@@ -4307,7 +4308,7 @@ function esc_sql( $data ) {
 function esc_url( $url, $protocols = null, $_context = 'display' ) {
 	$original_url = $url;
 
-	if ( '' == $url ) {
+	if ( '' === $url ) {
 		return $url;
 	}
 
@@ -4335,7 +4336,7 @@ function esc_url( $url, $protocols = null, $_context = 'display' ) {
 	}
 
 	// Replace ampersands and single quotes only when displaying.
-	if ( 'display' == $_context ) {
+	if ( 'display' === $_context ) {
 		$url = wp_kses_normalize_entities( $url );
 		$url = str_replace( '&amp;', '&#038;', $url );
 		$url = str_replace( "'", '&#039;', $url );
@@ -4645,7 +4646,7 @@ function sanitize_option( $option, $value ) {
 		case 'default_ping_status':
 		case 'default_comment_status':
 			// Options that if not there have 0 value but need to be something like "closed".
-			if ( '0' == $value || '' == $value ) {
+			if ( '0' == $value || '' === $value ) {
 				$value = 'closed';
 			}
 			break;
@@ -4977,7 +4978,7 @@ function wp_sprintf( $pattern, ...$args ) {
 		}
 
 		// Literal %: append and continue.
-		if ( substr( $pattern, $start, 2 ) == '%%' ) {
+		if ( '%%' === substr( $pattern, $start, 2 ) ) {
 			$start  += 2;
 			$result .= '%';
 			continue;
@@ -5043,7 +5044,7 @@ function wp_sprintf( $pattern, ...$args ) {
  */
 function wp_sprintf_l( $pattern, $args ) {
 	// Not a match.
-	if ( substr( $pattern, 0, 2 ) != '%l' ) {
+	if ( '%l' !== substr( $pattern, 0, 2 ) ) {
 		return $pattern;
 	}
 
@@ -5807,12 +5808,12 @@ function wp_staticize_emoji( $text ) {
 		$content = $textarr[ $i ];
 
 		// If we're in an ignore block, wait until we find its closing tag.
-		if ( '' == $ignore_block_element && preg_match( '/^<(' . $tags_to_ignore . ')>/', $content, $matches ) ) {
+		if ( '' === $ignore_block_element && preg_match( '/^<(' . $tags_to_ignore . ')>/', $content, $matches ) ) {
 			$ignore_block_element = $matches[1];
 		}
 
 		// If it's not a tag and not in ignore block.
-		if ( '' == $ignore_block_element && strlen( $content ) > 0 && '<' != $content[0] && false !== strpos( $content, '&#x' ) ) {
+		if ( '' === $ignore_block_element && strlen( $content ) > 0 && '<' !== $content[0] && false !== strpos( $content, '&#x' ) ) {
 			foreach ( $possible_emoji as $emojum => $emoji_char ) {
 				if ( false === strpos( $content, $emojum ) ) {
 					continue;
@@ -5828,7 +5829,7 @@ function wp_staticize_emoji( $text ) {
 		}
 
 		// Did we exit ignore block?
-		if ( '' != $ignore_block_element && '</' . $ignore_block_element . '>' == $content ) {
+		if ( '' !== $ignore_block_element && '</' . $ignore_block_element . '>' === $content ) {
 			$ignore_block_element = '';
 		}
 
diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 1d3b2c74bc..4a92e3ed8a 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -640,7 +640,7 @@ function is_serialized( $data, $strict = true ) {
 		return false;
 	}
 	$data = trim( $data );
-	if ( 'N;' == $data ) {
+	if ( 'N;' === $data ) {
 		return true;
 	}
 	if ( strlen( $data ) < 4 ) {
@@ -1517,7 +1517,7 @@ function get_num_queries() {
  * @return bool True if yes, false on anything else.
  */
 function bool_from_yn( $yn ) {
-	return ( strtolower( $yn ) == 'y' );
+	return ( 'y' === strtolower( $yn ) );
 }
 
 /**
@@ -1540,7 +1540,7 @@ function do_feed() {
 	// Remove the pad, if present.
 	$feed = preg_replace( '/^_+/', '', $feed );
 
-	if ( '' == $feed || 'feed' === $feed ) {
+	if ( '' === $feed || 'feed' === $feed ) {
 		$feed = get_default_feed();
 	}
 
@@ -1841,6 +1841,7 @@ function wp_referer_field( $echo = true ) {
 	if ( $echo ) {
 		echo $referer_field;
 	}
+
 	return $referer_field;
 }
 
@@ -1860,13 +1861,17 @@ function wp_referer_field( $echo = true ) {
  */
 function wp_original_referer_field( $echo = true, $jump_back_to = 'current' ) {
 	$ref = wp_get_original_referer();
+
 	if ( ! $ref ) {
-		$ref = 'previous' == $jump_back_to ? wp_get_referer() : wp_unslash( $_SERVER['REQUEST_URI'] );
+		$ref = ( 'previous' === $jump_back_to ) ? wp_get_referer() : wp_unslash( $_SERVER['REQUEST_URI'] );
 	}
+
 	$orig_referer_field = '<input type="hidden" name="_wp_original_http_referer" value="' . esc_attr( $ref ) . '" />';
+
 	if ( $echo ) {
 		echo $orig_referer_field;
 	}
+
 	return $orig_referer_field;
 }
 
@@ -1972,7 +1977,7 @@ function wp_mkdir_p( $target ) {
 
 	// We need to find the permissions of the parent folder that exists and inherit that.
 	$target_parent = dirname( $target );
-	while ( '.' != $target_parent && ! is_dir( $target_parent ) && dirname( $target_parent ) !== $target_parent ) {
+	while ( '.' !== $target_parent && ! is_dir( $target_parent ) && dirname( $target_parent ) !== $target_parent ) {
 		$target_parent = dirname( $target_parent );
 	}
 
@@ -2334,7 +2339,7 @@ function _wp_upload_dir( $time = null ) {
 	$siteurl     = get_option( 'siteurl' );
 	$upload_path = trim( get_option( 'upload_path' ) );
 
-	if ( empty( $upload_path ) || 'wp-content/uploads' == $upload_path ) {
+	if ( empty( $upload_path ) || 'wp-content/uploads' === $upload_path ) {
 		$dir = WP_CONTENT_DIR . '/uploads';
 	} elseif ( 0 !== strpos( $upload_path, ABSPATH ) ) {
 		// $dir is absolute, $upload_path is (maybe) relative to ABSPATH.
@@ -2345,7 +2350,7 @@ function _wp_upload_dir( $time = null ) {
 
 	$url = get_option( 'upload_url_path' );
 	if ( ! $url ) {
-		if ( empty( $upload_path ) || ( 'wp-content/uploads' == $upload_path ) || ( $upload_path == $dir ) ) {
+		if ( empty( $upload_path ) || ( 'wp-content/uploads' === $upload_path ) || ( $upload_path == $dir ) ) {
 			$url = WP_CONTENT_URL . '/uploads';
 		} else {
 			$url = trailingslashit( $siteurl ) . $upload_path;
@@ -3211,7 +3216,7 @@ function get_allowed_mime_types( $user = null ) {
  * @param string $action The nonce action.
  */
 function wp_nonce_ays( $action ) {
-	if ( 'log-out' == $action ) {
+	if ( 'log-out' === $action ) {
 		$html = sprintf(
 			/* translators: %s: Site title. */
 			__( 'You are attempting to log out of %s' ),
@@ -3539,7 +3544,7 @@ function _default_wp_die_handler( $message, $title = '', $args = array() ) {
 		}
 
 		<?php
-		if ( 'rtl' == $text_direction ) {
+		if ( 'rtl' === $text_direction ) {
 			echo 'body { font-family: Tahoma, Arial; }';
 		}
 		?>
@@ -4333,7 +4338,7 @@ function smilies_init() {
 
 		// New subpattern?
 		if ( $firstchar != $subchar ) {
-			if ( '' != $subchar ) {
+			if ( '' !== $subchar ) {
 				$wp_smiliessearch .= ')(?=' . $spaces . '|$)';  // End previous "subpattern".
 				$wp_smiliessearch .= '|(?<=' . $spaces . '|^)'; // Begin another "subpattern".
 			}
@@ -5214,7 +5219,8 @@ function _doing_it_wrong( $function, $message, $version ) {
 function is_lighttpd_before_150() {
 	$server_parts    = explode( '/', isset( $_SERVER['SERVER_SOFTWARE'] ) ? $_SERVER['SERVER_SOFTWARE'] : '' );
 	$server_parts[1] = isset( $server_parts[1] ) ? $server_parts[1] : '';
-	return 'lighttpd' == $server_parts[0] && -1 == version_compare( $server_parts[1], '1.5.0' );
+
+	return ( 'lighttpd' === $server_parts[0] && -1 == version_compare( $server_parts[1], '1.5.0' ) );
 }
 
 /**
@@ -5248,6 +5254,7 @@ function apache_mod_loaded( $mod, $default = false ) {
 			return true;
 		}
 	}
+
 	return $default;
 }
 
@@ -5274,7 +5281,7 @@ function iis7_supports_permalinks() {
 		 * Lastly we make sure that PHP is running via FastCGI. This is important because if it runs
 		 * via ISAPI then pretty permalinks will not work.
 		 */
-		$supports_permalinks = class_exists( 'DOMDocument', false ) && isset( $_SERVER['IIS_UrlRewriteModule'] ) && ( PHP_SAPI == 'cgi-fcgi' );
+		$supports_permalinks = class_exists( 'DOMDocument', false ) && isset( $_SERVER['IIS_UrlRewriteModule'] ) && ( 'cgi-fcgi' === PHP_SAPI );
 	}
 
 	/**
@@ -5324,7 +5331,7 @@ function validate_file( $file, $allowed_files = array() ) {
 	}
 
 	// Absolute Windows drive paths are not allowed:
-	if ( ':' == substr( $file, 1, 1 ) ) {
+	if ( ':' === substr( $file, 1, 1 ) ) {
 		return 2;
 	}
 
@@ -5364,7 +5371,7 @@ function force_ssl_admin( $force = null ) {
  * @return string The guessed URL.
  */
 function wp_guess_url() {
-	if ( defined( 'WP_SITEURL' ) && '' != WP_SITEURL ) {
+	if ( defined( 'WP_SITEURL' ) && '' !== WP_SITEURL ) {
 		$url = WP_SITEURL;
 	} else {
 		$abspath_fix         = str_replace( '\\', '/', ABSPATH );
@@ -5375,7 +5382,7 @@ function wp_guess_url() {
 			$path = preg_replace( '#/(wp-admin/.*|wp-login.php)#i', '', $_SERVER['REQUEST_URI'] );
 
 			// The request is for a file in ABSPATH.
-		} elseif ( $script_filename_dir . '/' == $abspath_fix ) {
+		} elseif ( $script_filename_dir . '/' === $abspath_fix ) {
 			// Strip off any file/query params in the path.
 			$path = preg_replace( '#/[^/]*$#i', '', $_SERVER['PHP_SELF'] );
 
@@ -5935,7 +5942,7 @@ function wp_scheduled_delete() {
 
 		$del_post = get_post( $post_id );
 
-		if ( ! $del_post || 'trash' != $del_post->post_status ) {
+		if ( ! $del_post || 'trash' !== $del_post->post_status ) {
 			delete_post_meta( $post_id, '_wp_trash_meta_status' );
 			delete_post_meta( $post_id, '_wp_trash_meta_time' );
 		} else {
@@ -5953,7 +5960,7 @@ function wp_scheduled_delete() {
 
 		$del_comment = get_comment( $comment_id );
 
-		if ( ! $del_comment || 'trash' != $del_comment->comment_approved ) {
+		if ( ! $del_comment || 'trash' !== $del_comment->comment_approved ) {
 			delete_comment_meta( $comment_id, '_wp_trash_meta_time' );
 			delete_comment_meta( $comment_id, '_wp_trash_meta_status' );
 		} else {
diff --git a/wp-includes/general-template.php b/wp-includes/general-template.php
index 437dd4dc1c..82c138cef7 100644
--- a/wp-includes/general-template.php
+++ b/wp-includes/general-template.php
@@ -253,7 +253,8 @@ function get_search_form( $args = array() ) {
 	$format = apply_filters( 'search_form_format', $format );
 
 	$search_form_template = locate_template( 'searchform.php' );
-	if ( '' != $search_form_template ) {
+
+	if ( '' !== $search_form_template ) {
 		ob_start();
 		require $search_form_template;
 		$form = ob_get_clean();
@@ -268,7 +269,7 @@ function get_search_form( $args = array() ) {
 			 */
 			$aria_label = '';
 		}
-		if ( 'html5' == $format ) {
+		if ( 'html5' === $format ) {
 			$form = '<form role="search" ' . $aria_label . 'method="get" class="search-form" action="' . esc_url( home_url( '/' ) ) . '">
 				<label>
 					<span class="screen-reader-text">' . _x( 'Search for:', 'label' ) . '</span>
@@ -762,7 +763,7 @@ function get_bloginfo( $show = '', $filter = 'raw' ) {
 			break;
 		case 'charset':
 			$output = get_option( 'blog_charset' );
-			if ( '' == $output ) {
+			if ( '' === $output ) {
 				$output = 'UTF-8';
 			}
 			break;
@@ -816,7 +817,7 @@ function get_bloginfo( $show = '', $filter = 'raw' ) {
 		$url = false;
 	}
 
-	if ( 'display' == $filter ) {
+	if ( 'display' === $filter ) {
 		if ( $url ) {
 			/**
 			 * Filters the URL returned by get_bloginfo().
@@ -1286,7 +1287,7 @@ function wp_title( $sep = '&raquo;', $display = true, $seplocation = '' ) {
 	$title_array = apply_filters( 'wp_title_parts', explode( $t_sep, $title ) );
 
 	// Determines position of the separator and direction of the breadcrumb.
-	if ( 'right' == $seplocation ) { // Separator on right, so reverse the order.
+	if ( 'right' === $seplocation ) { // Separator on right, so reverse the order.
 		$title_array = array_reverse( $title_array );
 		$title       = implode( " $sep ", $title_array ) . $prefix;
 	} else {
@@ -1834,9 +1835,10 @@ function wp_get_archives( $args = '' ) {
 	if ( ! is_post_type_viewable( $post_type_object ) ) {
 		return;
 	}
+
 	$parsed_args['post_type'] = $post_type_object->name;
 
-	if ( '' == $parsed_args['type'] ) {
+	if ( '' === $parsed_args['type'] ) {
 		$parsed_args['type'] = 'monthly';
 	}
 
@@ -1881,7 +1883,7 @@ function wp_get_archives( $args = '' ) {
 
 	$limit = $parsed_args['limit'];
 
-	if ( 'monthly' == $parsed_args['type'] ) {
+	if ( 'monthly' === $parsed_args['type'] ) {
 		$query   = "SELECT YEAR(post_date) AS `year`, MONTH(post_date) AS `month`, count(ID) as posts FROM $wpdb->posts $join $where GROUP BY YEAR(post_date), MONTH(post_date) ORDER BY post_date $order $limit";
 		$key     = md5( $query );
 		$key     = "wp_get_archives:$key:$last_changed";
@@ -1906,7 +1908,7 @@ function wp_get_archives( $args = '' ) {
 				$output  .= get_archives_link( $url, $text, $parsed_args['format'], $parsed_args['before'], $parsed_args['after'], $selected );
 			}
 		}
-	} elseif ( 'yearly' == $parsed_args['type'] ) {
+	} elseif ( 'yearly' === $parsed_args['type'] ) {
 		$query   = "SELECT YEAR(post_date) AS `year`, count(ID) as posts FROM $wpdb->posts $join $where GROUP BY YEAR(post_date) ORDER BY post_date $order $limit";
 		$key     = md5( $query );
 		$key     = "wp_get_archives:$key:$last_changed";
@@ -1930,7 +1932,7 @@ function wp_get_archives( $args = '' ) {
 				$output  .= get_archives_link( $url, $text, $parsed_args['format'], $parsed_args['before'], $parsed_args['after'], $selected );
 			}
 		}
-	} elseif ( 'daily' == $parsed_args['type'] ) {
+	} elseif ( 'daily' === $parsed_args['type'] ) {
 		$query   = "SELECT YEAR(post_date) AS `year`, MONTH(post_date) AS `month`, DAYOFMONTH(post_date) AS `dayofmonth`, count(ID) as posts FROM $wpdb->posts $join $where GROUP BY YEAR(post_date), MONTH(post_date), DAYOFMONTH(post_date) ORDER BY post_date $order $limit";
 		$key     = md5( $query );
 		$key     = "wp_get_archives:$key:$last_changed";
@@ -1955,7 +1957,7 @@ function wp_get_archives( $args = '' ) {
 				$output  .= get_archives_link( $url, $text, $parsed_args['format'], $parsed_args['before'], $parsed_args['after'], $selected );
 			}
 		}
-	} elseif ( 'weekly' == $parsed_args['type'] ) {
+	} elseif ( 'weekly' === $parsed_args['type'] ) {
 		$week    = _wp_mysql_week( '`post_date`' );
 		$query   = "SELECT DISTINCT $week AS `week`, YEAR( `post_date` ) AS `yr`, DATE_FORMAT( `post_date`, '%Y-%m-%d' ) AS `yyyymmdd`, count( `ID` ) AS `posts` FROM `$wpdb->posts` $join $where GROUP BY $week, YEAR( `post_date` ) ORDER BY `post_date` $order $limit";
 		$key     = md5( $query );
@@ -1994,8 +1996,8 @@ function wp_get_archives( $args = '' ) {
 				}
 			}
 		}
-	} elseif ( ( 'postbypost' == $parsed_args['type'] ) || ( 'alpha' == $parsed_args['type'] ) ) {
-		$orderby = ( 'alpha' == $parsed_args['type'] ) ? 'post_title ASC ' : 'post_date DESC, ID DESC ';
+	} elseif ( ( 'postbypost' === $parsed_args['type'] ) || ( 'alpha' === $parsed_args['type'] ) ) {
+		$orderby = ( 'alpha' === $parsed_args['type'] ) ? 'post_title ASC ' : 'post_date DESC, ID DESC ';
 		$query   = "SELECT * FROM $wpdb->posts $join $where ORDER BY $orderby $limit";
 		$key     = md5( $query );
 		$key     = "wp_get_archives:$key:$last_changed";
@@ -2402,7 +2404,7 @@ function get_the_date( $format = '', $post = null ) {
 		return false;
 	}
 
-	if ( '' == $format ) {
+	if ( '' === $format ) {
 		$the_date = get_post_time( get_option( 'date_format' ), false, $post, true );
 	} else {
 		$the_date = get_post_time( $format, false, $post, true );
@@ -2531,7 +2533,7 @@ function get_the_time( $format = '', $post = null ) {
 		return false;
 	}
 
-	if ( '' == $format ) {
+	if ( '' === $format ) {
 		$the_time = get_post_time( get_option( 'time_format' ), false, $post, true );
 	} else {
 		$the_time = get_post_time( $format, false, $post, true );
@@ -3342,7 +3344,7 @@ function user_can_richedit() {
 	if ( ! isset( $wp_rich_edit ) ) {
 		$wp_rich_edit = false;
 
-		if ( get_user_option( 'rich_editing' ) == 'true' || ! is_user_logged_in() ) { // Default to 'true' for logged out users.
+		if ( 'true' === get_user_option( 'rich_editing' ) || ! is_user_logged_in() ) { // Default to 'true' for logged out users.
 			if ( $is_safari ) {
 				$wp_rich_edit = ! wp_is_mobile() || ( preg_match( '!AppleWebKit/(\d+)!', $_SERVER['HTTP_USER_AGENT'], $match ) && intval( $match[1] ) >= 534 );
 			} elseif ( $is_IE ) {
diff --git a/wp-includes/http.php b/wp-includes/http.php
index c2678afae1..fc34c170f4 100644
--- a/wp-includes/http.php
+++ b/wp-includes/http.php
@@ -375,7 +375,7 @@ function wp_http_supports( $capabilities = array(), $url = null ) {
 
 	if ( $url && ! isset( $capabilities['ssl'] ) ) {
 		$scheme = parse_url( $url, PHP_URL_SCHEME );
-		if ( 'https' == $scheme || 'ssl' == $scheme ) {
+		if ( 'https' === $scheme || 'ssl' === $scheme ) {
 			$capabilities['ssl'] = true;
 		}
 	}
diff --git a/wp-includes/kses.php b/wp-includes/kses.php
index b445a429a3..ae7cc0f411 100644
--- a/wp-includes/kses.php
+++ b/wp-includes/kses.php
@@ -775,12 +775,12 @@ function wp_kses_one_attr( $string, $element ) {
 
 		// Remove quotes surrounding $value.
 		// Also guarantee correct quoting in $string for this one attribute.
-		if ( '' == $value ) {
+		if ( '' === $value ) {
 			$quote = '';
 		} else {
 			$quote = $value[0];
 		}
-		if ( '"' == $quote || "'" == $quote ) {
+		if ( '"' === $quote || "'" === $quote ) {
 			if ( substr( $value, -1 ) != $quote ) {
 				return '';
 			}
@@ -1039,17 +1039,17 @@ function wp_kses_split2( $string, $allowed_html, $allowed_protocols ) {
 	$string = wp_kses_stripslashes( $string );
 
 	// It matched a ">" character.
-	if ( substr( $string, 0, 1 ) != '<' ) {
+	if ( '<' !== substr( $string, 0, 1 ) ) {
 		return '&gt;';
 	}
 
 	// Allow HTML comments.
-	if ( '<!--' == substr( $string, 0, 4 ) ) {
+	if ( '<!--' === substr( $string, 0, 4 ) ) {
 		$string = str_replace( array( '<!--', '-->' ), '', $string );
 		while ( ( $newstring = wp_kses( $string, $allowed_html, $allowed_protocols ) ) != $string ) {
 			$string = $newstring;
 		}
-		if ( '' == $string ) {
+		if ( '' === $string ) {
 			return '';
 		}
 		// Prevent multiple dashes in comments.
@@ -1078,7 +1078,7 @@ function wp_kses_split2( $string, $allowed_html, $allowed_protocols ) {
 	}
 
 	// No attributes are allowed for closing elements.
-	if ( '' != $slash ) {
+	if ( '' !== $slash ) {
 		return "</$elem>";
 	}
 
@@ -1164,7 +1164,7 @@ function wp_kses_attr_check( &$name, &$value, &$whole, $vless, $element, $allowe
 
 	$allowed_attr = $allowed_html[ $element_low ];
 
-	if ( ! isset( $allowed_attr[ $name_low ] ) || '' == $allowed_attr[ $name_low ] ) {
+	if ( ! isset( $allowed_attr[ $name_low ] ) || '' === $allowed_attr[ $name_low ] ) {
 		/*
 		 * Allow `data-*` attributes.
 		 *
@@ -1189,7 +1189,7 @@ function wp_kses_attr_check( &$name, &$value, &$whole, $vless, $element, $allowe
 		}
 	}
 
-	if ( 'style' == $name_low ) {
+	if ( 'style' === $name_low ) {
 		$new_value = safecss_filter_attr( $value );
 
 		if ( empty( $new_value ) ) {
@@ -1609,7 +1609,7 @@ function wp_kses_no_null( $string, $options = null ) {
 	}
 
 	$string = preg_replace( '/[\x00-\x08\x0B\x0C\x0E-\x1F]/', '', $string );
-	if ( 'remove' == $options['slash_zero'] ) {
+	if ( 'remove' === $options['slash_zero'] ) {
 		$string = preg_replace( '/\\\\+0+/', '', $string );
 	}
 
@@ -1688,7 +1688,7 @@ function wp_kses_bad_protocol_once( $string, $allowed_protocols, $count = 1 ) {
 	if ( isset( $string2[1] ) && ! preg_match( '%/\?%', $string2[0] ) ) {
 		$string   = trim( $string2[1] );
 		$protocol = wp_kses_bad_protocol_once2( $string2[0], $allowed_protocols );
-		if ( 'feed:' == $protocol ) {
+		if ( 'feed:' === $protocol ) {
 			if ( $count > 2 ) {
 				return '';
 			}
@@ -2244,7 +2244,7 @@ function safecss_filter_attr( $css, $deprecated = '' ) {
 
 	$css = '';
 	foreach ( $css_array as $css_item ) {
-		if ( '' == $css_item ) {
+		if ( '' === $css_item ) {
 			continue;
 		}
 
@@ -2302,7 +2302,7 @@ function safecss_filter_attr( $css, $deprecated = '' ) {
 
 		// Remove any CSS containing containing \ ( & } = or comments, except for url() useage checked above.
 		if ( $found && ! preg_match( '%[\\\(&=}]|/\*%', $css_test_string ) ) {
-			if ( '' != $css ) {
+			if ( '' !== $css ) {
 				$css .= ';';
 			}
 
diff --git a/wp-includes/link-template.php b/wp-includes/link-template.php
index 9dbbf4931f..cec437dd02 100644
--- a/wp-includes/link-template.php
+++ b/wp-includes/link-template.php
@@ -131,7 +131,7 @@ function get_permalink( $post = 0, $leavename = false ) {
 		$leavename ? '' : '%pagename%',
 	);
 
-	if ( is_object( $post ) && isset( $post->filter ) && 'sample' == $post->filter ) {
+	if ( is_object( $post ) && isset( $post->filter ) && 'sample' === $post->filter ) {
 		$sample = true;
 	} else {
 		$post   = get_post( $post );
@@ -165,7 +165,7 @@ function get_permalink( $post = 0, $leavename = false ) {
 	 */
 	$permalink = apply_filters( 'pre_post_link', $permalink, $post, $leavename );
 
-	if ( '' != $permalink && ! in_array( $post->post_status, array( 'draft', 'pending', 'auto-draft', 'future' ), true ) ) {
+	if ( $permalink && ! in_array( $post->post_status, array( 'draft', 'pending', 'auto-draft', 'future' ), true ) ) {
 
 		$category = '';
 		if ( strpos( $permalink, '%category%' ) !== false ) {
@@ -620,7 +620,8 @@ function get_feed_link( $feed = '' ) {
 	global $wp_rewrite;
 
 	$permalink = $wp_rewrite->get_feed_permastruct();
-	if ( '' != $permalink ) {
+
+	if ( '' !== $permalink ) {
 		if ( false !== strpos( $feed, 'comments_' ) ) {
 			$feed      = str_replace( 'comments_', '', $feed );
 			$permalink = $wp_rewrite->get_comment_feed_permastruct();
@@ -681,7 +682,7 @@ function get_post_comments_feed_link( $post_id = 0, $feed = '' ) {
 	$post       = get_post( $post_id );
 	$unattached = 'attachment' === $post->post_type && 0 === (int) $post->post_parent;
 
-	if ( '' != get_option( 'permalink_structure' ) ) {
+	if ( get_option( 'permalink_structure' ) ) {
 		if ( 'page' === get_option( 'show_on_front' ) && get_option( 'page_on_front' ) == $post_id ) {
 			$url = _get_page_link( $post_id );
 		} else {
@@ -794,7 +795,7 @@ function get_author_feed_link( $author_id, $feed = '' ) {
 		$feed = get_default_feed();
 	}
 
-	if ( '' == $permalink_structure ) {
+	if ( ! $permalink_structure ) {
 		$link = home_url( "?feed=$feed&amp;author=" . $author_id );
 	} else {
 		$link = get_author_posts_url( $author_id );
@@ -866,10 +867,10 @@ function get_term_feed_link( $term_id, $taxonomy = 'category', $feed = '' ) {
 
 	$permalink_structure = get_option( 'permalink_structure' );
 
-	if ( '' == $permalink_structure ) {
-		if ( 'category' == $taxonomy ) {
+	if ( ! $permalink_structure ) {
+		if ( 'category' === $taxonomy ) {
 			$link = home_url( "?feed=$feed&amp;cat=$term_id" );
-		} elseif ( 'post_tag' == $taxonomy ) {
+		} elseif ( 'post_tag' === $taxonomy ) {
 			$link = home_url( "?feed=$feed&amp;tag=$term->slug" );
 		} else {
 			$t    = get_taxonomy( $taxonomy );
@@ -886,7 +887,7 @@ function get_term_feed_link( $term_id, $taxonomy = 'category', $feed = '' ) {
 		$link = trailingslashit( $link ) . user_trailingslashit( $feed_link, 'feed' );
 	}
 
-	if ( 'category' == $taxonomy ) {
+	if ( 'category' === $taxonomy ) {
 		/**
 		 * Filters the category feed link.
 		 *
@@ -896,7 +897,7 @@ function get_term_feed_link( $term_id, $taxonomy = 'category', $feed = '' ) {
 		 * @param string $feed Feed type. Possible values include 'rss2', 'atom'.
 		 */
 		$link = apply_filters( 'category_feed_link', $link, $feed );
-	} elseif ( 'post_tag' == $taxonomy ) {
+	} elseif ( 'post_tag' === $taxonomy ) {
 		/**
 		 * Filters the post tag feed link.
 		 *
@@ -1364,7 +1365,7 @@ function get_edit_post_link( $id = 0, $context = 'display' ) {
 
 	if ( 'revision' === $post->post_type ) {
 		$action = '';
-	} elseif ( 'display' == $context ) {
+	} elseif ( 'display' === $context ) {
 		$action = '&amp;action=edit';
 	} else {
 		$action = '&action=edit';
@@ -2268,7 +2269,7 @@ function get_pagenum_link( $pagenum = 1, $escape = true ) {
 
 		$base = trailingslashit( get_bloginfo( 'url' ) );
 
-		if ( $wp_rewrite->using_index_permalinks() && ( $pagenum > 1 || '' != $request ) ) {
+		if ( $wp_rewrite->using_index_permalinks() && ( $pagenum > 1 || '' !== $request ) ) {
 			$base .= $wp_rewrite->index . '/';
 		}
 
@@ -2728,7 +2729,7 @@ function get_the_posts_pagination( $args = array() ) {
 		);
 
 		// Make sure we get a string back. Plain is the next best thing.
-		if ( isset( $args['type'] ) && 'array' == $args['type'] ) {
+		if ( isset( $args['type'] ) && 'array' === $args['type'] ) {
 			$args['type'] = 'plain';
 		}
 
@@ -2823,7 +2824,7 @@ function get_comments_pagenum_link( $pagenum = 1, $max_page = 0 ) {
 
 	$result = get_permalink();
 
-	if ( 'newest' == get_option( 'default_comments_page' ) ) {
+	if ( 'newest' === get_option( 'default_comments_page' ) ) {
 		if ( $pagenum != $max_page ) {
 			if ( $wp_rewrite->using_permalinks() ) {
 				$result = user_trailingslashit( trailingslashit( $result ) . $wp_rewrite->comments_pagination_base . '-' . $pagenum, 'commentpaged' );
@@ -3110,7 +3111,7 @@ function get_the_comments_pagination( $args = array() ) {
 	$args['echo'] = false;
 
 	// Make sure we get a string back. Plain is the next best thing.
-	if ( isset( $args['type'] ) && 'array' == $args['type'] ) {
+	if ( isset( $args['type'] ) && 'array' === $args['type'] ) {
 		$args['type'] = 'plain';
 	}
 
@@ -3405,7 +3406,7 @@ function plugins_url( $path = '', $plugin = '' ) {
 
 	if ( ! empty( $plugin ) && is_string( $plugin ) ) {
 		$folder = dirname( plugin_basename( $plugin ) );
-		if ( '.' != $folder ) {
+		if ( '.' !== $folder ) {
 			$url .= '/' . ltrim( $folder, '/' );
 		}
 	}
@@ -3451,7 +3452,7 @@ function network_site_url( $path = '', $scheme = null ) {
 
 	$current_network = get_network();
 
-	if ( 'relative' == $scheme ) {
+	if ( 'relative' === $scheme ) {
 		$url = $current_network->path;
 	} else {
 		$url = set_url_scheme( 'http://' . $current_network->domain . $current_network->path, $scheme );
@@ -3501,7 +3502,7 @@ function network_home_url( $path = '', $scheme = null ) {
 		$scheme = is_ssl() && ! is_admin() ? 'https' : 'http';
 	}
 
-	if ( 'relative' == $scheme ) {
+	if ( 'relative' === $scheme ) {
 		$url = $current_network->path;
 	} else {
 		$url = set_url_scheme( 'http://' . $current_network->domain . $current_network->path, $scheme );
@@ -3645,7 +3646,7 @@ function set_url_scheme( $url, $scheme = null ) {
 		$url = 'http:' . $url;
 	}
 
-	if ( 'relative' == $scheme ) {
+	if ( 'relative' === $scheme ) {
 		$url = ltrim( preg_replace( '#^\w+://[^/]*#', '', $url ) );
 		if ( '' !== $url && '/' === $url[0] ) {
 			$url = '/' . ltrim( $url, "/ \t\n\r\0\x0B" );
@@ -3784,7 +3785,7 @@ function wp_get_canonical_url( $post = null ) {
 	if ( get_queried_object_id() === $post->ID ) {
 		$page = get_query_var( 'page', 0 );
 		if ( $page >= 2 ) {
-			if ( '' == get_option( 'permalink_structure' ) ) {
+			if ( ! get_option( 'permalink_structure' ) ) {
 				$canonical_url = add_query_arg( 'page', $page, $canonical_url );
 			} else {
 				$canonical_url = trailingslashit( $canonical_url ) . user_trailingslashit( $page, 'single_paged' );
@@ -3873,10 +3874,10 @@ function wp_get_shortlink( $id = 0, $context = 'post', $allow_slugs = true ) {
 	}
 
 	$post_id = 0;
-	if ( 'query' == $context && is_singular() ) {
+	if ( 'query' === $context && is_singular() ) {
 		$post_id = get_queried_object_id();
 		$post    = get_post( $post_id );
-	} elseif ( 'post' == $context ) {
+	} elseif ( 'post' === $context ) {
 		$post = get_post( $id );
 		if ( ! empty( $post->ID ) ) {
 			$post_id = $post->ID;
diff --git a/wp-includes/load.php b/wp-includes/load.php
index 72d92e58e7..51fe392a20 100644
--- a/wp-includes/load.php
+++ b/wp-includes/load.php
@@ -40,7 +40,7 @@ function wp_fix_server_vars() {
 	$_SERVER = array_merge( $default_server_values, $_SERVER );
 
 	// Fix for IIS when running with PHP ISAPI.
-	if ( empty( $_SERVER['REQUEST_URI'] ) || ( PHP_SAPI != 'cgi-fcgi' && preg_match( '/^Microsoft-IIS\//', $_SERVER['SERVER_SOFTWARE'] ) ) ) {
+	if ( empty( $_SERVER['REQUEST_URI'] ) || ( 'cgi-fcgi' !== PHP_SAPI && preg_match( '/^Microsoft-IIS\//', $_SERVER['SERVER_SOFTWARE'] ) ) ) {
 
 		if ( isset( $_SERVER['HTTP_X_ORIGINAL_URL'] ) ) {
 			// IIS Mod-Rewrite.
@@ -137,7 +137,7 @@ function wp_check_php_mysql_versions() {
  * @deprecated 5.4.0 Deprecated in favor of do_favicon().
  */
 function wp_favicon_request() {
-	if ( '/favicon.ico' == $_SERVER['REQUEST_URI'] ) {
+	if ( '/favicon.ico' === $_SERVER['REQUEST_URI'] ) {
 		header( 'Content-Type: image/vnd.microsoft.icon' );
 		exit;
 	}
@@ -628,7 +628,7 @@ function wp_get_mu_plugins() {
 		return $mu_plugins;
 	}
 	while ( ( $plugin = readdir( $dh ) ) !== false ) {
-		if ( substr( $plugin, -4 ) == '.php' ) {
+		if ( '.php' === substr( $plugin, -4 ) ) {
 			$mu_plugins[] = WPMU_PLUGIN_DIR . '/' . $plugin;
 		}
 	}
@@ -670,7 +670,7 @@ function wp_get_active_and_valid_plugins() {
 
 	foreach ( $active_plugins as $plugin ) {
 		if ( ! validate_file( $plugin )                     // $plugin must validate as file.
-			&& '.php' == substr( $plugin, -4 )              // $plugin must end with '.php'.
+			&& '.php' === substr( $plugin, -4 )             // $plugin must end with '.php'.
 			&& file_exists( WP_PLUGIN_DIR . '/' . $plugin ) // $plugin must exist.
 			// Not already included as a network plugin.
 			&& ( ! $network_plugins || ! in_array( WP_PLUGIN_DIR . '/' . $plugin, $network_plugins, true ) )
@@ -1168,7 +1168,7 @@ function wp_load_translations_early() {
 
 	while ( true ) {
 		if ( defined( 'WPLANG' ) ) {
-			if ( '' == WPLANG ) {
+			if ( '' === WPLANG ) {
 				break;
 			}
 			$locales[] = WPLANG;
@@ -1263,7 +1263,7 @@ function wp_installing( $is_installing = null ) {
  */
 function is_ssl() {
 	if ( isset( $_SERVER['HTTPS'] ) ) {
-		if ( 'on' == strtolower( $_SERVER['HTTPS'] ) ) {
+		if ( 'on' === strtolower( $_SERVER['HTTPS'] ) ) {
 			return true;
 		}
 
diff --git a/wp-includes/media-template.php b/wp-includes/media-template.php
index 1fdbf390d9..7742f73883 100644
--- a/wp-includes/media-template.php
+++ b/wp-includes/media-template.php
@@ -832,15 +832,15 @@ function wp_print_media_templates() {
 					data-user-setting="urlbutton"
 				<# } #>>
 
-				<option value="post" <# if ( ! wp.media.galleryDefaults.link || 'post' == wp.media.galleryDefaults.link ) {
+				<option value="post" <# if ( ! wp.media.galleryDefaults.link || 'post' === wp.media.galleryDefaults.link ) {
 					#>selected="selected"<# }
 				#>>
 					<?php esc_html_e( 'Attachment Page' ); ?>
 				</option>
-				<option value="file" <# if ( 'file' == wp.media.galleryDefaults.link ) { #>selected="selected"<# } #>>
+				<option value="file" <# if ( 'file' === wp.media.galleryDefaults.link ) { #>selected="selected"<# } #>>
 					<?php esc_html_e( 'Media File' ); ?>
 				</option>
-				<option value="none" <# if ( 'none' == wp.media.galleryDefaults.link ) { #>selected="selected"<# } #>>
+				<option value="none" <# if ( 'none' === wp.media.galleryDefaults.link ) { #>selected="selected"<# } #>>
 					<?php esc_html_e( 'None' ); ?>
 				</option>
 			</select>
diff --git a/wp-includes/meta.php b/wp-includes/meta.php
index 7eee83a759..de00456c78 100644
--- a/wp-includes/meta.php
+++ b/wp-includes/meta.php
@@ -173,7 +173,7 @@ function update_metadata( $meta_type, $object_id, $meta_key, $meta_value, $prev_
 	$meta_subtype = get_object_subtype( $meta_type, $object_id );
 
 	$column    = sanitize_key( $meta_type . '_id' );
-	$id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
+	$id_column = ( 'user' === $meta_type ) ? 'umeta_id' : 'meta_id';
 
 	// expected_slashed ($meta_key)
 	$raw_meta_key = $meta_key;
@@ -248,7 +248,7 @@ function update_metadata( $meta_type, $object_id, $meta_key, $meta_value, $prev_
 		 */
 		do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
 
-		if ( 'post' == $meta_type ) {
+		if ( 'post' === $meta_type ) {
 			/**
 			 * Fires immediately before updating a post's metadata.
 			 *
@@ -287,7 +287,7 @@ function update_metadata( $meta_type, $object_id, $meta_key, $meta_value, $prev_
 		 */
 		do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
 
-		if ( 'post' == $meta_type ) {
+		if ( 'post' === $meta_type ) {
 			/**
 			 * Fires immediately after updating a post's metadata.
 			 *
@@ -346,7 +346,8 @@ function delete_metadata( $meta_type, $object_id, $meta_key, $meta_value = '', $
 	}
 
 	$type_column = sanitize_key( $meta_type . '_id' );
-	$id_column   = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
+	$id_column   = ( 'user' === $meta_type ) ? 'umeta_id' : 'meta_id';
+
 	// expected_slashed ($meta_key)
 	$meta_key   = wp_unslash( $meta_key );
 	$meta_value = wp_unslash( $meta_value );
@@ -415,7 +416,7 @@ function delete_metadata( $meta_type, $object_id, $meta_key, $meta_value = '', $
 	do_action( "delete_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $_meta_value );
 
 	// Old-style action.
-	if ( 'post' == $meta_type ) {
+	if ( 'post' === $meta_type ) {
 		/**
 		 * Fires immediately before deleting metadata for a post.
 		 *
@@ -458,7 +459,7 @@ function delete_metadata( $meta_type, $object_id, $meta_key, $meta_value = '', $
 	do_action( "deleted_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $_meta_value );
 
 	// Old-style action.
-	if ( 'post' == $meta_type ) {
+	if ( 'post' === $meta_type ) {
 		/**
 		 * Fires immediately after deleting metadata for a post.
 		 *
@@ -620,7 +621,7 @@ function get_metadata_by_mid( $meta_type, $meta_id ) {
 		return false;
 	}
 
-	$id_column = ( 'user' == $meta_type ) ? 'umeta_id' : 'meta_id';
+	$id_column = ( 'user' === $meta_type ) ? 'umeta_id' : 'meta_id';
 
 	/**
 	 * Filters whether to retrieve metadata of a specific type by meta ID.
@@ -685,7 +686,7 @@ function update_metadata_by_mid( $meta_type, $meta_id, $meta_value, $meta_key =
 	}
 
 	$column    = sanitize_key( $meta_type . '_id' );
-	$id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
+	$id_column = ( 'user' === $meta_type ) ? 'umeta_id' : 'meta_id';
 
 	/**
 	 * Filters whether to update metadata of a specific type by meta ID.
@@ -740,7 +741,7 @@ function update_metadata_by_mid( $meta_type, $meta_id, $meta_value, $meta_key =
 		/** This action is documented in wp-includes/meta.php */
 		do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
 
-		if ( 'post' == $meta_type ) {
+		if ( 'post' === $meta_type ) {
 			/** This action is documented in wp-includes/meta.php */
 			do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value );
 		}
@@ -757,7 +758,7 @@ function update_metadata_by_mid( $meta_type, $meta_id, $meta_value, $meta_key =
 		/** This action is documented in wp-includes/meta.php */
 		do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
 
-		if ( 'post' == $meta_type ) {
+		if ( 'post' === $meta_type ) {
 			/** This action is documented in wp-includes/meta.php */
 			do_action( 'updated_postmeta', $meta_id, $object_id, $meta_key, $meta_value );
 		}
@@ -801,7 +802,7 @@ function delete_metadata_by_mid( $meta_type, $meta_id ) {
 
 	// Object and ID columns.
 	$column    = sanitize_key( $meta_type . '_id' );
-	$id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
+	$id_column = ( 'user' === $meta_type ) ? 'umeta_id' : 'meta_id';
 
 	/**
 	 * Filters whether to delete metadata of a specific type by meta ID.
@@ -829,7 +830,7 @@ function delete_metadata_by_mid( $meta_type, $meta_id ) {
 		do_action( "delete_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value );
 
 		// Old-style action.
-		if ( 'post' == $meta_type || 'comment' == $meta_type ) {
+		if ( 'post' === $meta_type || 'comment' === $meta_type ) {
 			/**
 			 * Fires immediately before deleting post or comment metadata of a specific type.
 			 *
@@ -853,7 +854,7 @@ function delete_metadata_by_mid( $meta_type, $meta_id ) {
 		do_action( "deleted_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value );
 
 		// Old-style action.
-		if ( 'post' == $meta_type || 'comment' == $meta_type ) {
+		if ( 'post' === $meta_type || 'comment' === $meta_type ) {
 			/**
 			 * Fires immediately after deleting post or comment metadata of a specific type.
 			 *
@@ -943,7 +944,8 @@ function update_meta_cache( $meta_type, $object_ids ) {
 
 	// Get meta info.
 	$id_list   = join( ',', $ids );
-	$id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
+	$id_column = ( 'user' === $meta_type ) ? 'umeta_id' : 'meta_id';
+
 	$meta_list = $wpdb->get_results( "SELECT $column, meta_key, meta_value FROM $table WHERE $column IN ($id_list) ORDER BY $id_column ASC", ARRAY_A );
 
 	if ( ! empty( $meta_list ) ) {
@@ -1045,7 +1047,7 @@ function _get_meta_table( $type ) {
  * @return bool Whether the meta key is considered protected.
  */
 function is_protected_meta( $meta_key, $meta_type = '' ) {
-	$protected = ( '_' == $meta_key[0] );
+	$protected = ( '_' === $meta_key[0] );
 
 	/**
 	 * Filters whether a meta key is considered protected.
diff --git a/wp-includes/ms-blogs.php b/wp-includes/ms-blogs.php
index e59dde5078..4adb674b8c 100644
--- a/wp-includes/ms-blogs.php
+++ b/wp-includes/ms-blogs.php
@@ -137,7 +137,7 @@ function get_blog_details( $fields = null, $get_all = true ) {
 			if ( false !== $blog ) {
 				return $blog;
 			}
-			if ( substr( $fields['domain'], 0, 4 ) == 'www.' ) {
+			if ( 'www.' === substr( $fields['domain'], 0, 4 ) ) {
 				$nowww = substr( $fields['domain'], 4 );
 				$blog  = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain IN (%s,%s) AND path = %s ORDER BY CHAR_LENGTH(domain) DESC", $nowww, $fields['domain'], $fields['path'] ) );
 			} else {
@@ -155,7 +155,7 @@ function get_blog_details( $fields = null, $get_all = true ) {
 			if ( false !== $blog ) {
 				return $blog;
 			}
-			if ( substr( $fields['domain'], 0, 4 ) == 'www.' ) {
+			if ( 'www.' === substr( $fields['domain'], 0, 4 ) ) {
 				$nowww = substr( $fields['domain'], 4 );
 				$blog  = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain IN (%s,%s) ORDER BY CHAR_LENGTH(domain) DESC", $nowww, $fields['domain'] ) );
 			} else {
@@ -784,7 +784,7 @@ function _update_blog_date_on_post_publish( $new_status, $old_status, $post ) {
 		return;
 	}
 
-	if ( 'publish' != $new_status && 'publish' != $old_status ) {
+	if ( 'publish' !== $new_status && 'publish' !== $old_status ) {
 		return;
 	}
 
@@ -809,7 +809,7 @@ function _update_blog_date_on_post_delete( $post_id ) {
 		return;
 	}
 
-	if ( 'publish' != $post->post_status ) {
+	if ( 'publish' !== $post->post_status ) {
 		return;
 	}
 
diff --git a/wp-includes/ms-default-constants.php b/wp-includes/ms-default-constants.php
index 519d908b42..3164cf6e89 100644
--- a/wp-includes/ms-default-constants.php
+++ b/wp-includes/ms-default-constants.php
@@ -36,7 +36,7 @@ function ms_upload_constants() {
 		define( 'UPLOADS', UPLOADBLOGSDIR . '/' . $site_id . '/files/' );
 
 		// Uploads dir relative to ABSPATH.
-		if ( 'wp-content/blogs.dir' == UPLOADBLOGSDIR && ! defined( 'BLOGUPLOADDIR' ) ) {
+		if ( 'wp-content/blogs.dir' === UPLOADBLOGSDIR && ! defined( 'BLOGUPLOADDIR' ) ) {
 			define( 'BLOGUPLOADDIR', WP_CONTENT_DIR . '/blogs.dir/' . $site_id . '/files/' );
 		}
 	}
@@ -155,7 +155,7 @@ function ms_subdomain_constants() {
 
 	if ( defined( 'SUBDOMAIN_INSTALL' ) && defined( 'VHOST' ) ) {
 		$subdomain_error = true;
-		if ( SUBDOMAIN_INSTALL !== ( 'yes' == VHOST ) ) {
+		if ( SUBDOMAIN_INSTALL !== ( 'yes' === VHOST ) ) {
 			$subdomain_error_warn = true;
 		}
 	} elseif ( defined( 'SUBDOMAIN_INSTALL' ) ) {
@@ -163,7 +163,7 @@ function ms_subdomain_constants() {
 		define( 'VHOST', SUBDOMAIN_INSTALL ? 'yes' : 'no' );
 	} elseif ( defined( 'VHOST' ) ) {
 		$subdomain_error = true;
-		define( 'SUBDOMAIN_INSTALL', 'yes' == VHOST );
+		define( 'SUBDOMAIN_INSTALL', 'yes' === VHOST );
 	} else {
 		$subdomain_error = false;
 		define( 'SUBDOMAIN_INSTALL', false );
diff --git a/wp-includes/ms-deprecated.php b/wp-includes/ms-deprecated.php
index cd30478811..3dff066c6b 100644
--- a/wp-includes/ms-deprecated.php
+++ b/wp-includes/ms-deprecated.php
@@ -199,7 +199,7 @@ function get_blog_list( $start = 0, $num = 10, $deprecated = '' ) {
 		return array();
 	}
 
-	if ( $num == 'all' ) {
+	if ( 'all' === $num ) {
 		return array_slice( $blog_list, $start, count( $blog_list ) );
 	} else {
 		return array_slice( $blog_list, $start, $num );
@@ -293,7 +293,7 @@ function wpmu_admin_do_redirect( $url = '' ) {
 	if ( isset( $_GET['redirect'] ) && isset( $_POST['redirect'] ) && $_GET['redirect'] !== $_POST['redirect'] ) {
 		wp_die( __( 'A variable mismatch has been detected.' ), __( 'Sorry, you are not allowed to view this item.' ), 400 );
 	} elseif ( isset( $_GET['redirect'] ) ) {
-		if ( substr( $_GET['redirect'], 0, 2 ) == 's_' )
+		if ( 's_' === substr( $_GET['redirect'], 0, 2 ) )
 			$url .= '&action=blogs&s='. esc_html( substr( $_GET['redirect'], 2 ) );
 	} elseif ( isset( $_POST['redirect'] ) ) {
 		$url = wpmu_admin_redirect_add_updated_param( $_POST['redirect'] );
@@ -372,7 +372,7 @@ function get_blogaddress_by_domain( $domain, $path ) {
 			$blogname = substr( $domain, 0, strpos( $domain, '.' ) );
 			$url = 'http://' . substr( $domain, strpos( $domain, '.' ) + 1 ) . $path;
 			// We're not installing the main blog.
-			if ( $blogname != 'www.' )
+			if ( 'www.' !== $blogname )
 				$url .= $blogname . '/';
 		} else { // Main blog.
 			$url = 'http://' . $domain . $path;
@@ -718,7 +718,7 @@ function update_user_status( $id, $pref, $value, $deprecated = null ) {
 	$user = new WP_User( $id );
 	clean_user_cache( $user );
 
-	if ( $pref == 'spam' ) {
+	if ( 'spam' === $pref ) {
 		if ( $value == 1 ) {
 			/** This filter is documented in wp-includes/user.php */
 			do_action( 'make_spam_user', $id );
diff --git a/wp-includes/ms-functions.php b/wp-includes/ms-functions.php
index dae8d4f742..bcdf5bcefc 100644
--- a/wp-includes/ms-functions.php
+++ b/wp-includes/ms-functions.php
@@ -944,11 +944,14 @@ function wpmu_signup_blog_notification( $domain, $path, $title, $user_login, $us
 	}
 
 	$activate_url = esc_url( $activate_url );
-	$admin_email  = get_site_option( 'admin_email' );
-	if ( '' == $admin_email ) {
+
+	$admin_email = get_site_option( 'admin_email' );
+
+	if ( '' === $admin_email ) {
 		$admin_email = 'support@' . $_SERVER['SERVER_NAME'];
 	}
-	$from_name       = get_site_option( 'site_name' ) == '' ? 'WordPress' : esc_html( get_site_option( 'site_name' ) );
+
+	$from_name       = ( '' !== get_site_option( 'site_name' ) ) ? esc_html( get_site_option( 'site_name' ) ) : 'WordPress';
 	$message_headers = "From: \"{$from_name}\" <{$admin_email}>\n" . 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . "\"\n";
 
 	$user            = get_user_by( 'login', $user_login );
@@ -1070,10 +1073,12 @@ function wpmu_signup_user_notification( $user_login, $user_email, $key, $meta =
 
 	// Send email with activation link.
 	$admin_email = get_site_option( 'admin_email' );
-	if ( '' == $admin_email ) {
+
+	if ( '' === $admin_email ) {
 		$admin_email = 'support@' . $_SERVER['SERVER_NAME'];
 	}
-	$from_name       = get_site_option( 'site_name' ) == '' ? 'WordPress' : esc_html( get_site_option( 'site_name' ) );
+
+	$from_name       = ( '' !== get_site_option( 'site_name' ) ) ? esc_html( get_site_option( 'site_name' ) ) : 'WordPress';
 	$message_headers = "From: \"{$from_name}\" <{$admin_email}>\n" . 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . "\"\n";
 	$message         = sprintf(
 		/**
@@ -1224,7 +1229,7 @@ function wpmu_activate_signup( $key ) {
 		 * failed in between creating the blog and setting the activation flag.
 		 * Let's just set the active flag and instruct the user to reset their password.
 		 */
-		if ( 'blog_taken' == $blog_id->get_error_code() ) {
+		if ( 'blog_taken' === $blog_id->get_error_code() ) {
 			$blog_id->add_data( $signup );
 			$wpdb->update(
 				$wpdb->signups,
@@ -1398,11 +1403,12 @@ function newblog_notify_siteadmin( $blog_id, $deprecated = '' ) {
 		$blog_id = $blog_id->blog_id;
 	}
 
-	if ( get_site_option( 'registrationnotification' ) != 'yes' ) {
+	if ( 'yes' !== get_site_option( 'registrationnotification' ) ) {
 		return false;
 	}
 
 	$email = get_site_option( 'admin_email' );
+
 	if ( is_email( $email ) == false ) {
 		return false;
 	}
@@ -1458,7 +1464,7 @@ Disable these notifications: %4$s'
  * @return bool
  */
 function newuser_notify_siteadmin( $user_id ) {
-	if ( get_site_option( 'registrationnotification' ) != 'yes' ) {
+	if ( 'yes' !== get_site_option( 'registrationnotification' ) ) {
 		return false;
 	}
 
@@ -1632,13 +1638,14 @@ We hope you enjoy your new site. Thanks!
 	 * @param array  $meta          Signup meta data. By default, contains the requested privacy setting and lang_id.
 	 */
 	$welcome_email = apply_filters( 'update_welcome_email', $welcome_email, $blog_id, $user_id, $password, $title, $meta );
-	$admin_email   = get_site_option( 'admin_email' );
 
-	if ( '' == $admin_email ) {
+	$admin_email = get_site_option( 'admin_email' );
+
+	if ( '' === $admin_email ) {
 		$admin_email = 'support@' . $_SERVER['SERVER_NAME'];
 	}
 
-	$from_name       = get_site_option( 'site_name' ) == '' ? 'WordPress' : esc_html( get_site_option( 'site_name' ) );
+	$from_name       = ( '' !== get_site_option( 'site_name' ) ) ? esc_html( get_site_option( 'site_name' ) ) : 'WordPress';
 	$message_headers = "From: \"{$from_name}\" <{$admin_email}>\n" . 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . "\"\n";
 	$message         = $welcome_email;
 
@@ -1726,11 +1733,11 @@ function wpmu_welcome_user_notification( $user_id, $password, $meta = array() )
 
 	$admin_email = get_site_option( 'admin_email' );
 
-	if ( '' == $admin_email ) {
+	if ( '' === $admin_email ) {
 		$admin_email = 'support@' . $_SERVER['SERVER_NAME'];
 	}
 
-	$from_name       = get_site_option( 'site_name' ) == '' ? 'WordPress' : esc_html( get_site_option( 'site_name' ) );
+	$from_name       = ( '' !== get_site_option( 'site_name' ) ) ? esc_html( get_site_option( 'site_name' ) ) : 'WordPress';
 	$message_headers = "From: \"{$from_name}\" <{$admin_email}>\n" . 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . "\"\n";
 	$message         = $welcome_email;
 
@@ -1849,7 +1856,7 @@ function check_upload_mimes( $mimes ) {
 	$site_mimes = array();
 	foreach ( $site_exts as $ext ) {
 		foreach ( $mimes as $ext_pattern => $mime ) {
-			if ( '' != $ext && false !== strpos( $ext_pattern, $ext ) ) {
+			if ( '' !== $ext && false !== strpos( $ext_pattern, $ext ) ) {
 				$site_mimes[ $ext_pattern ] = $mime;
 			}
 		}
@@ -2119,7 +2126,7 @@ function maybe_add_existing_user_to_blog() {
 	$parts = explode( '/', $_SERVER['REQUEST_URI'] );
 	$key   = array_pop( $parts );
 
-	if ( '' == $key ) {
+	if ( '' === $key ) {
 		$key = array_pop( $parts );
 	}
 
@@ -2309,7 +2316,7 @@ Thanks!
 function force_ssl_content( $force = '' ) {
 	static $forced_content = false;
 
-	if ( '' != $force ) {
+	if ( ! $force ) {
 		$old_forced     = $forced_content;
 		$forced_content = $force;
 		return $old_forced;
@@ -2594,7 +2601,7 @@ function wp_is_large_network( $using = 'sites', $network_id = null ) {
 		$network_id = get_current_network_id();
 	}
 
-	if ( 'users' == $using ) {
+	if ( 'users' === $using ) {
 		$count = get_user_count( $network_id );
 		/**
 		 * Filters whether the network is considered large.
@@ -2611,6 +2618,7 @@ function wp_is_large_network( $using = 'sites', $network_id = null ) {
 	}
 
 	$count = get_blog_count( $network_id );
+
 	/** This filter is documented in wp-includes/ms-functions.php */
 	return apply_filters( 'wp_is_large_network', $count > 10000, 'sites', $count, $network_id );
 }
diff --git a/wp-includes/ms-load.php b/wp-includes/ms-load.php
index 0e369101ae..29bb41114a 100644
--- a/wp-includes/ms-load.php
+++ b/wp-includes/ms-load.php
@@ -20,7 +20,7 @@ function is_subdomain_install() {
 		return SUBDOMAIN_INSTALL;
 	}
 
-	return ( defined( 'VHOST' ) && VHOST == 'yes' );
+	return ( defined( 'VHOST' ) && 'yes' === VHOST );
 }
 
 /**
@@ -46,7 +46,7 @@ function wp_get_active_network_plugins() {
 
 	foreach ( $active_plugins as $plugin ) {
 		if ( ! validate_file( $plugin )                     // $plugin must validate as file.
-			&& '.php' == substr( $plugin, -4 )              // $plugin must end with '.php'.
+			&& '.php' === substr( $plugin, -4 )             // $plugin must end with '.php'.
 			&& file_exists( WP_PLUGIN_DIR . '/' . $plugin ) // $plugin must exist.
 			) {
 			$plugins[] = WP_PLUGIN_DIR . '/' . $plugin;
@@ -499,7 +499,7 @@ function ms_not_installed( $domain, $path ) {
 	);
 	$msg .= ' ' . __( 'If you&#8217;re still stuck with this message, then check that your database contains the following tables:' ) . '</p><ul>';
 	foreach ( $wpdb->tables( 'global' ) as $t => $table ) {
-		if ( 'sitecategories' == $t ) {
+		if ( 'sitecategories' === $t ) {
 			continue;
 		}
 		$msg .= '<li>' . $table . '</li>';
diff --git a/wp-includes/ms-settings.php b/wp-includes/ms-settings.php
index 1aff91ac66..6824895880 100644
--- a/wp-includes/ms-settings.php
+++ b/wp-includes/ms-settings.php
@@ -55,10 +55,10 @@ ms_subdomain_constants();
 if ( ! isset( $current_site ) || ! isset( $current_blog ) ) {
 
 	$domain = strtolower( stripslashes( $_SERVER['HTTP_HOST'] ) );
-	if ( substr( $domain, -3 ) == ':80' ) {
+	if ( ':80' === substr( $domain, -3 ) ) {
 		$domain               = substr( $domain, 0, -3 );
 		$_SERVER['HTTP_HOST'] = substr( $_SERVER['HTTP_HOST'], 0, -3 );
-	} elseif ( substr( $domain, -4 ) == ':443' ) {
+	} elseif ( ':443' === substr( $domain, -4 ) ) {
 		$domain               = substr( $domain, 0, -4 );
 		$_SERVER['HTTP_HOST'] = substr( $_SERVER['HTTP_HOST'], 0, -4 );
 	}
diff --git a/wp-includes/nav-menu-template.php b/wp-includes/nav-menu-template.php
index d49dbeed02..2f82bb9820 100644
--- a/wp-includes/nav-menu-template.php
+++ b/wp-includes/nav-menu-template.php
@@ -392,7 +392,7 @@ function _wp_menu_item_classes_by_context( &$menu_items ) {
 		}
 
 		// If the menu item corresponds to a taxonomy term for the currently queried non-hierarchical post object.
-		if ( $wp_query->is_singular && 'taxonomy' == $menu_item->type
+		if ( $wp_query->is_singular && 'taxonomy' === $menu_item->type
 			&& in_array( (int) $menu_item->object_id, $possible_object_parents, true )
 		) {
 			$active_parent_object_ids[] = (int) $menu_item->object_id;
@@ -403,9 +403,10 @@ function _wp_menu_item_classes_by_context( &$menu_items ) {
 		} elseif (
 			$menu_item->object_id == $queried_object_id
 			&& (
-				( ! empty( $home_page_id ) && 'post_type' == $menu_item->type && $wp_query->is_home && $home_page_id == $menu_item->object_id )
-				|| ( 'post_type' == $menu_item->type && $wp_query->is_singular )
-				|| ( 'taxonomy' == $menu_item->type
+				( ! empty( $home_page_id ) && 'post_type' === $menu_item->type
+					&& $wp_query->is_home && $home_page_id == $menu_item->object_id )
+				|| ( 'post_type' === $menu_item->type && $wp_query->is_singular )
+				|| ( 'taxonomy' === $menu_item->type
 					&& ( $wp_query->is_category || $wp_query->is_tag || $wp_query->is_tax )
 					&& $queried_object->taxonomy == $menu_item->object )
 			)
@@ -421,7 +422,7 @@ function _wp_menu_item_classes_by_context( &$menu_items ) {
 				$active_ancestor_item_ids[] = $_anc_id;
 			}
 
-			if ( 'post_type' == $menu_item->type && 'page' == $menu_item->object ) {
+			if ( 'post_type' === $menu_item->type && 'page' === $menu_item->object ) {
 				// Back compat classes for pages to match wp_page_menu().
 				$classes[] = 'page_item';
 				$classes[] = 'page-item-' . $menu_item->object_id;
@@ -434,7 +435,7 @@ function _wp_menu_item_classes_by_context( &$menu_items ) {
 
 			// If the menu item corresponds to the currently queried post type archive.
 		} elseif (
-			'post_type_archive' == $menu_item->type
+			'post_type_archive' === $menu_item->type
 			&& is_post_type_archive( array( $menu_item->object ) )
 		) {
 			$classes[]                   = 'current-menu-item';
@@ -451,7 +452,7 @@ function _wp_menu_item_classes_by_context( &$menu_items ) {
 			$active_parent_item_ids[] = (int) $menu_item->menu_item_parent;
 
 			// If the menu item corresponds to the currently requested URL.
-		} elseif ( 'custom' == $menu_item->object && isset( $_SERVER['HTTP_HOST'] ) ) {
+		} elseif ( 'custom' === $menu_item->object && isset( $_SERVER['HTTP_HOST'] ) ) {
 			$_root_relative_current = untrailingslashit( $_SERVER['REQUEST_URI'] );
 
 			// If it's the customize page then it will strip the query var off the URL before entering the comparison block.
@@ -504,7 +505,9 @@ function _wp_menu_item_classes_by_context( &$menu_items ) {
 		}
 
 		// Back-compat with wp_page_menu(): add "current_page_parent" to static home page link for any non-page query.
-		if ( ! empty( $home_page_id ) && 'post_type' == $menu_item->type && empty( $wp_query->is_page ) && $home_page_id == $menu_item->object_id ) {
+		if ( ! empty( $home_page_id ) && 'post_type' === $menu_item->type
+			&& empty( $wp_query->is_page ) && $home_page_id == $menu_item->object_id
+		) {
 			$classes[] = 'current_page_parent';
 		}
 
@@ -525,7 +528,7 @@ function _wp_menu_item_classes_by_context( &$menu_items ) {
 			&& (
 				// Ancestral post object.
 				(
-					'post_type' == $parent_item->type
+					'post_type' === $parent_item->type
 					&& ! empty( $queried_object->post_type )
 					&& is_post_type_hierarchical( $queried_object->post_type )
 					&& in_array( (int) $parent_item->object_id, $queried_object->ancestors, true )
@@ -534,7 +537,7 @@ function _wp_menu_item_classes_by_context( &$menu_items ) {
 
 				// Ancestral term.
 				(
-					'taxonomy' == $parent_item->type
+					'taxonomy' === $parent_item->type
 					&& isset( $possible_taxonomy_ancestors[ $parent_item->object ] )
 					&& in_array( (int) $parent_item->object_id, $possible_taxonomy_ancestors[ $parent_item->object ], true )
 					&& (
@@ -565,7 +568,7 @@ function _wp_menu_item_classes_by_context( &$menu_items ) {
 			$classes[] = 'current-' . $active_object . '-parent';
 		}
 
-		if ( 'post_type' == $parent_item->type && 'page' == $parent_item->object ) {
+		if ( 'post_type' === $parent_item->type && 'page' === $parent_item->object ) {
 			// Back compat classes for pages to match wp_page_menu().
 			if ( in_array( 'current-menu-parent', $classes, true ) ) {
 				$classes[] = 'current_page_parent';
diff --git a/wp-includes/nav-menu.php b/wp-includes/nav-menu.php
index 12d5c31ba2..e786d786db 100644
--- a/wp-includes/nav-menu.php
+++ b/wp-includes/nav-menu.php
@@ -70,7 +70,7 @@ function is_nav_menu( $menu ) {
 		$menu_obj &&
 		! is_wp_error( $menu_obj ) &&
 		! empty( $menu_obj->taxonomy ) &&
-		'nav_menu' == $menu_obj->taxonomy
+		'nav_menu' === $menu_obj->taxonomy
 	) {
 		return true;
 	}
@@ -235,7 +235,7 @@ function wp_get_nav_menu_name( $location ) {
  * @return bool Whether the given ID is that of a nav menu item.
  */
 function is_nav_menu_item( $menu_item_id = 0 ) {
-	return ( ! is_wp_error( $menu_item_id ) && ( 'nav_menu_item' == get_post_type( $menu_item_id ) ) );
+	return ( ! is_wp_error( $menu_item_id ) && ( 'nav_menu_item' === get_post_type( $menu_item_id ) ) );
 }
 
 /**
@@ -476,15 +476,15 @@ function wp_update_nav_menu_item( $menu_id = 0, $menu_item_db_id = 0, $menu_item
 		$args['menu-item-url'] = '';
 
 		$original_title = '';
-		if ( 'taxonomy' == $args['menu-item-type'] ) {
+		if ( 'taxonomy' === $args['menu-item-type'] ) {
 			$original_parent = get_term_field( 'parent', $args['menu-item-object-id'], $args['menu-item-object'], 'raw' );
 			$original_title  = get_term_field( 'name', $args['menu-item-object-id'], $args['menu-item-object'], 'raw' );
-		} elseif ( 'post_type' == $args['menu-item-type'] ) {
+		} elseif ( 'post_type' === $args['menu-item-type'] ) {
 
 			$original_object = get_post( $args['menu-item-object-id'] );
 			$original_parent = (int) $original_object->post_parent;
 			$original_title  = $original_object->post_title;
-		} elseif ( 'post_type_archive' == $args['menu-item-type'] ) {
+		} elseif ( 'post_type_archive' === $args['menu-item-type'] ) {
 			$original_object = get_post_type_object( $args['menu-item-object'] );
 			if ( $original_object ) {
 				$original_title = $original_object->labels->archives;
@@ -496,7 +496,7 @@ function wp_update_nav_menu_item( $menu_id = 0, $menu_item_db_id = 0, $menu_item
 		}
 
 		// Hack to get wp to create a post object when too many properties are empty.
-		if ( '' == $args['menu-item-title'] && '' == $args['menu-item-description'] ) {
+		if ( '' === $args['menu-item-title'] && '' === $args['menu-item-description'] ) {
 			$args['menu-item-description'] = ' ';
 		}
 	}
@@ -517,7 +517,7 @@ function wp_update_nav_menu_item( $menu_id = 0, $menu_item_db_id = 0, $menu_item
 	// New menu item. Default is draft status.
 	if ( ! $update ) {
 		$post['ID']          = 0;
-		$post['post_status'] = 'publish' == $args['menu-item-status'] ? 'publish' : 'draft';
+		$post['post_status'] = 'publish' === $args['menu-item-status'] ? 'publish' : 'draft';
 		$menu_item_db_id     = wp_insert_post( $post );
 		if ( ! $menu_item_db_id || is_wp_error( $menu_item_db_id ) ) {
 			return $menu_item_db_id;
@@ -543,7 +543,7 @@ function wp_update_nav_menu_item( $menu_id = 0, $menu_item_db_id = 0, $menu_item
 		wp_set_object_terms( $menu_item_db_id, array( $menu->term_id ), 'nav_menu' );
 	}
 
-	if ( 'custom' == $args['menu-item-type'] ) {
+	if ( 'custom' === $args['menu-item-type'] ) {
 		$args['menu-item-object-id'] = $menu_item_db_id;
 		$args['menu-item-object']    = 'custom';
 	}
@@ -571,7 +571,7 @@ function wp_update_nav_menu_item( $menu_id = 0, $menu_item_db_id = 0, $menu_item
 	// Update existing menu item. Default is publish status.
 	if ( $update ) {
 		$post['ID']          = $menu_item_db_id;
-		$post['post_status'] = 'draft' == $args['menu-item-status'] ? 'draft' : 'publish';
+		$post['post_status'] = ( 'draft' === $args['menu-item-status'] ) ? 'draft' : 'publish';
 		wp_update_post( $post );
 	}
 
@@ -711,9 +711,9 @@ function wp_get_nav_menu_items( $menu, $args = array() ) {
 			$object    = get_post_meta( $item->ID, '_menu_item_object', true );
 			$type      = get_post_meta( $item->ID, '_menu_item_type', true );
 
-			if ( 'post_type' == $type ) {
+			if ( 'post_type' === $type ) {
 				$posts[ $object ][] = $object_id;
-			} elseif ( 'taxonomy' == $type ) {
+			} elseif ( 'taxonomy' === $type ) {
 				$terms[ $object ][] = $object_id;
 			}
 		}
@@ -806,14 +806,14 @@ function wp_get_nav_menu_items( $menu, $args = array() ) {
  */
 function wp_setup_nav_menu_item( $menu_item ) {
 	if ( isset( $menu_item->post_type ) ) {
-		if ( 'nav_menu_item' == $menu_item->post_type ) {
+		if ( 'nav_menu_item' === $menu_item->post_type ) {
 			$menu_item->db_id            = (int) $menu_item->ID;
 			$menu_item->menu_item_parent = ! isset( $menu_item->menu_item_parent ) ? get_post_meta( $menu_item->ID, '_menu_item_menu_item_parent', true ) : $menu_item->menu_item_parent;
 			$menu_item->object_id        = ! isset( $menu_item->object_id ) ? get_post_meta( $menu_item->ID, '_menu_item_object_id', true ) : $menu_item->object_id;
 			$menu_item->object           = ! isset( $menu_item->object ) ? get_post_meta( $menu_item->ID, '_menu_item_object', true ) : $menu_item->object;
 			$menu_item->type             = ! isset( $menu_item->type ) ? get_post_meta( $menu_item->ID, '_menu_item_type', true ) : $menu_item->type;
 
-			if ( 'post_type' == $menu_item->type ) {
+			if ( 'post_type' === $menu_item->type ) {
 				$object = get_post_type_object( $menu_item->object );
 				if ( $object ) {
 					$menu_item->type_label = $object->labels->singular_name;
@@ -853,7 +853,7 @@ function wp_setup_nav_menu_item( $menu_item ) {
 
 				$menu_item->title = ( '' === $menu_item->post_title ) ? $original_title : $menu_item->post_title;
 
-			} elseif ( 'post_type_archive' == $menu_item->type ) {
+			} elseif ( 'post_type_archive' === $menu_item->type ) {
 				$object = get_post_type_object( $menu_item->object );
 				if ( $object ) {
 					$menu_item->title      = ( '' === $menu_item->post_title ) ? $object->labels->archives : $menu_item->post_title;
@@ -868,7 +868,7 @@ function wp_setup_nav_menu_item( $menu_item ) {
 				$post_type_description = ( '' === $post_content ) ? $post_type_description : $post_content;
 				$menu_item->url        = get_post_type_archive_link( $menu_item->object );
 
-			} elseif ( 'taxonomy' == $menu_item->type ) {
+			} elseif ( 'taxonomy' === $menu_item->type ) {
 				$object = get_taxonomy( $menu_item->object );
 				if ( $object ) {
 					$menu_item->type_label = $object->labels->singular_name;
@@ -1013,13 +1013,13 @@ function wp_get_associated_nav_menu_items( $object_id = 0, $object_type = 'post_
 		if ( isset( $menu_item->ID ) && is_nav_menu_item( $menu_item->ID ) ) {
 			$menu_item_type = get_post_meta( $menu_item->ID, '_menu_item_type', true );
 			if (
-				'post_type' == $object_type &&
-				'post_type' == $menu_item_type
+				'post_type' === $object_type &&
+				'post_type' === $menu_item_type
 			) {
 				$menu_item_ids[] = (int) $menu_item->ID;
 			} elseif (
-				'taxonomy' == $object_type &&
-				'taxonomy' == $menu_item_type &&
+				'taxonomy' === $object_type &&
+				'taxonomy' === $menu_item_type &&
 				get_post_meta( $menu_item->ID, '_menu_item_object', true ) == $taxonomy
 			) {
 				$menu_item_ids[] = (int) $menu_item->ID;
@@ -1079,7 +1079,7 @@ function _wp_delete_tax_menu_item( $object_id = 0, $tt_id, $taxonomy ) {
  * @param WP_Post $post       The post object being transitioned from one status to another.
  */
 function _wp_auto_add_pages_to_menu( $new_status, $old_status, $post ) {
-	if ( 'publish' != $new_status || 'publish' == $old_status || 'page' != $post->post_type ) {
+	if ( 'publish' !== $new_status || 'publish' === $old_status || 'page' !== $post->post_type ) {
 		return;
 	}
 	if ( ! empty( $post->post_parent ) ) {
diff --git a/wp-includes/option.php b/wp-includes/option.php
index b38ea66109..28ef635466 100644
--- a/wp-includes/option.php
+++ b/wp-includes/option.php
@@ -128,7 +128,7 @@ function get_option( $option, $default = false ) {
 	}
 
 	// If home is not set, use siteurl.
-	if ( 'home' == $option && '' == $value ) {
+	if ( 'home' === $option && '' === $value ) {
 		return get_option( 'siteurl' );
 	}
 
@@ -508,7 +508,7 @@ function add_option( $option, $value = '', $deprecated = '', $autoload = 'yes' )
 	}
 
 	if ( ! wp_installing() ) {
-		if ( 'yes' == $autoload ) {
+		if ( 'yes' === $autoload ) {
 			$alloptions            = wp_load_alloptions( true );
 			$alloptions[ $option ] = $serialized_value;
 			wp_cache_set( 'alloptions', $alloptions, 'options' );
@@ -586,7 +586,7 @@ function delete_option( $option ) {
 
 	$result = $wpdb->delete( $wpdb->options, array( 'option_name' => $option ) );
 	if ( ! wp_installing() ) {
-		if ( 'yes' == $row->autoload ) {
+		if ( 'yes' === $row->autoload ) {
 			$alloptions = wp_load_alloptions( true );
 			if ( is_array( $alloptions ) && isset( $alloptions[ $option ] ) ) {
 				unset( $alloptions[ $option ] );
@@ -2154,7 +2154,7 @@ function register_setting( $option_group, $option_name, $args = array() ) {
 		$wp_registered_settings = array();
 	}
 
-	if ( 'misc' == $option_group ) {
+	if ( 'misc' === $option_group ) {
 		_deprecated_argument(
 			__FUNCTION__,
 			'3.0.0',
@@ -2167,7 +2167,7 @@ function register_setting( $option_group, $option_name, $args = array() ) {
 		$option_group = 'general';
 	}
 
-	if ( 'privacy' == $option_group ) {
+	if ( 'privacy' === $option_group ) {
 		_deprecated_argument(
 			__FUNCTION__,
 			'3.5.0',
@@ -2207,7 +2207,7 @@ function register_setting( $option_group, $option_name, $args = array() ) {
 function unregister_setting( $option_group, $option_name, $deprecated = '' ) {
 	global $new_whitelist_options, $wp_registered_settings;
 
-	if ( 'misc' == $option_group ) {
+	if ( 'misc' === $option_group ) {
 		_deprecated_argument(
 			__FUNCTION__,
 			'3.0.0',
@@ -2220,7 +2220,7 @@ function unregister_setting( $option_group, $option_name, $deprecated = '' ) {
 		$option_group = 'general';
 	}
 
-	if ( 'privacy' == $option_group ) {
+	if ( 'privacy' === $option_group ) {
 		_deprecated_argument(
 			__FUNCTION__,
 			'3.5.0',
diff --git a/wp-includes/pluggable.php b/wp-includes/pluggable.php
index e484923a42..f87763b16f 100644
--- a/wp-includes/pluggable.php
+++ b/wp-includes/pluggable.php
@@ -329,7 +329,7 @@ if ( ! function_exists( 'wp_mail' ) ) :
 		if ( ! isset( $from_email ) ) {
 			// Get the site domain and get rid of www.
 			$sitename = strtolower( $_SERVER['SERVER_NAME'] );
-			if ( substr( $sitename, 0, 4 ) == 'www.' ) {
+			if ( 'www.' === substr( $sitename, 0, 4 ) ) {
 				$sitename = substr( $sitename, 4 );
 			}
 
@@ -432,7 +432,7 @@ if ( ! function_exists( 'wp_mail' ) ) :
 		$phpmailer->ContentType = $content_type;
 
 		// Set whether it's plaintext, depending on $content_type.
-		if ( 'text/html' == $content_type ) {
+		if ( 'text/html' === $content_type ) {
 			$phpmailer->isHTML( true );
 		}
 
@@ -633,7 +633,7 @@ if ( ! function_exists( 'wp_validate_auth_cookie' ) ) :
 		$expiration = $cookie_elements['expiration'];
 
 		// Allow a grace period for POST and Ajax requests.
-		if ( wp_doing_ajax() || 'POST' == $_SERVER['REQUEST_METHOD'] ) {
+		if ( wp_doing_ajax() || 'POST' === $_SERVER['REQUEST_METHOD'] ) {
 			$expired += HOUR_IN_SECONDS;
 		}
 
@@ -1266,7 +1266,7 @@ if ( ! function_exists( 'wp_redirect' ) ) :
 
 		$location = wp_sanitize_redirect( $location );
 
-		if ( ! $is_IIS && PHP_SAPI != 'cgi-fcgi' ) {
+		if ( ! $is_IIS && 'cgi-fcgi' !== PHP_SAPI ) {
 			status_header( $status ); // This causes problems on IIS and some FastCGI setups.
 		}
 
@@ -1414,7 +1414,7 @@ if ( ! function_exists( 'wp_validate_redirect' ) ) :
 	function wp_validate_redirect( $location, $default = '' ) {
 		$location = trim( $location, " \t\n\r\0\x08\x0B" );
 		// Browsers will assume 'http' is your protocol, and will obey a redirect to a URL starting with '//'.
-		if ( substr( $location, 0, 2 ) == '//' ) {
+		if ( '//' === substr( $location, 0, 2 ) ) {
 			$location = 'http:' . $location;
 		}
 
@@ -1431,7 +1431,7 @@ if ( ! function_exists( 'wp_validate_redirect' ) ) :
 		}
 
 		// Allow only 'http' and 'https' schemes. No 'data:', etc.
-		if ( isset( $lp['scheme'] ) && ! ( 'http' == $lp['scheme'] || 'https' == $lp['scheme'] ) ) {
+		if ( isset( $lp['scheme'] ) && ! ( 'http' === $lp['scheme'] || 'https' === $lp['scheme'] ) ) {
 			return $default;
 		}
 
@@ -1646,14 +1646,14 @@ if ( ! function_exists( 'wp_notify_postauthor' ) ) :
 
 		$wp_email = 'wordpress@' . preg_replace( '#^www\.#', '', strtolower( $_SERVER['SERVER_NAME'] ) );
 
-		if ( '' == $comment->comment_author ) {
+		if ( '' === $comment->comment_author ) {
 			$from = "From: \"$blogname\" <$wp_email>";
-			if ( '' != $comment->comment_author_email ) {
+			if ( '' !== $comment->comment_author_email ) {
 				$reply_to = "Reply-To: $comment->comment_author_email";
 			}
 		} else {
 			$from = "From: \"$comment->comment_author\" <$wp_email>";
-			if ( '' != $comment->comment_author_email ) {
+			if ( '' !== $comment->comment_author_email ) {
 				$reply_to = "Reply-To: \"$comment->comment_author_email\" <$comment->comment_author_email>";
 			}
 		}
@@ -2271,7 +2271,7 @@ if ( ! function_exists( 'wp_salt' ) ) :
 		if ( defined( 'SECRET_KEY' ) && SECRET_KEY && empty( $duplicated_keys[ SECRET_KEY ] ) ) {
 			$values['key'] = SECRET_KEY;
 		}
-		if ( 'auth' == $scheme && defined( 'SECRET_SALT' ) && SECRET_SALT && empty( $duplicated_keys[ SECRET_SALT ] ) ) {
+		if ( 'auth' === $scheme && defined( 'SECRET_SALT' ) && SECRET_SALT && empty( $duplicated_keys[ SECRET_SALT ] ) ) {
 			$values['salt'] = SECRET_SALT;
 		}
 
diff --git a/wp-includes/pomo/mo.php b/wp-includes/pomo/mo.php
index b37c09b6af..b4f829fdef 100644
--- a/wp-includes/pomo/mo.php
+++ b/wp-includes/pomo/mo.php
@@ -221,7 +221,7 @@ if ( ! class_exists( 'MO', false ) ) :
 			}
 			$reader->setEndian( $endian_string );
 
-			$endian = ( 'big' == $endian_string ) ? 'N' : 'V';
+			$endian = ( 'big' === $endian_string ) ? 'N' : 'V';
 
 			$header = $reader->read( 24 );
 			if ( $reader->strlen( $header ) != 24 ) {
diff --git a/wp-includes/pomo/po.php b/wp-includes/pomo/po.php
index 238573d041..29f370841d 100644
--- a/wp-includes/pomo/po.php
+++ b/wp-includes/pomo/po.php
@@ -149,7 +149,7 @@ if ( ! class_exists( 'PO', false ) ) :
 				$chars = $chars[0];
 				foreach ( $chars as $char ) {
 					if ( ! $previous_is_backslash ) {
-						if ( '\\' == $char ) {
+						if ( '\\' === $char ) {
 							$previous_is_backslash = true;
 						} else {
 							$unpoified .= $char;
@@ -294,7 +294,7 @@ if ( ! class_exists( 'PO', false ) ) :
 				if ( ! $res ) {
 					break;
 				}
-				if ( '' == $res['entry']->singular ) {
+				if ( '' === $res['entry']->singular ) {
 					$this->set_headers( $this->make_headers( $res['entry']->translations[0] ) );
 				} else {
 					$this->add_entry( $res['entry'] );
@@ -460,16 +460,16 @@ if ( ! class_exists( 'PO', false ) ) :
 		function read_line( $f, $action = 'read' ) {
 			static $last_line     = '';
 			static $use_last_line = false;
-			if ( 'clear' == $action ) {
+			if ( 'clear' === $action ) {
 				$last_line = '';
 				return true;
 			}
-			if ( 'put-back' == $action ) {
+			if ( 'put-back' === $action ) {
 				$use_last_line = true;
 				return true;
 			}
 			$line          = $use_last_line ? $last_line : fgets( $f );
-			$line          = ( "\r\n" == substr( $line, -2 ) ) ? rtrim( $line, "\r\n" ) . "\n" : $line;
+			$line          = ( "\r\n" === substr( $line, -2 ) ) ? rtrim( $line, "\r\n" ) . "\n" : $line;
 			$last_line     = $line;
 			$use_last_line = false;
 			return $line;
@@ -482,11 +482,11 @@ if ( ! class_exists( 'PO', false ) ) :
 		function add_comment_to_entry( &$entry, $po_comment_line ) {
 			$first_two = substr( $po_comment_line, 0, 2 );
 			$comment   = trim( substr( $po_comment_line, 2 ) );
-			if ( '#:' == $first_two ) {
+			if ( '#:' === $first_two ) {
 				$entry->references = array_merge( $entry->references, preg_split( '/\s+/', $comment ) );
-			} elseif ( '#.' == $first_two ) {
+			} elseif ( '#.' === $first_two ) {
 				$entry->extracted_comments = trim( $entry->extracted_comments . "\n" . $comment );
-			} elseif ( '#,' == $first_two ) {
+			} elseif ( '#,' === $first_two ) {
 				$entry->flags = array_merge( $entry->flags, preg_split( '/,\s*/', $comment ) );
 			} else {
 				$entry->translator_comments = trim( $entry->translator_comments . "\n" . $comment );
@@ -498,10 +498,10 @@ if ( ! class_exists( 'PO', false ) ) :
 		 * @return string
 		 */
 		public static function trim_quotes( $s ) {
-			if ( substr( $s, 0, 1 ) == '"' ) {
+			if ( '"' === substr( $s, 0, 1 ) ) {
 				$s = substr( $s, 1 );
 			}
-			if ( substr( $s, -1, 1 ) == '"' ) {
+			if ( '"' === substr( $s, -1, 1 ) ) {
 				$s = substr( $s, 0, -1 );
 			}
 			return $s;
diff --git a/wp-includes/pomo/streams.php b/wp-includes/pomo/streams.php
index 07edcc2cd0..8d8a2edcc7 100644
--- a/wp-includes/pomo/streams.php
+++ b/wp-includes/pomo/streams.php
@@ -54,7 +54,7 @@ if ( ! class_exists( 'POMO_Reader', false ) ) :
 			if ( 4 != $this->strlen( $bytes ) ) {
 				return false;
 			}
-			$endian_letter = ( 'big' == $this->endian ) ? 'N' : 'V';
+			$endian_letter = ( 'big' === $this->endian ) ? 'N' : 'V';
 			$int           = unpack( $endian_letter, $bytes );
 			return reset( $int );
 		}
@@ -71,7 +71,7 @@ if ( ! class_exists( 'POMO_Reader', false ) ) :
 			if ( 4 * $count != $this->strlen( $bytes ) ) {
 				return false;
 			}
-			$endian_letter = ( 'big' == $this->endian ) ? 'N' : 'V';
+			$endian_letter = ( 'big' === $this->endian ) ? 'N' : 'V';
 			return unpack( $endian_letter . $count, $bytes );
 		}
 
diff --git a/wp-includes/pomo/translations.php b/wp-includes/pomo/translations.php
index 7211b52441..f4a125e32c 100644
--- a/wp-includes/pomo/translations.php
+++ b/wp-includes/pomo/translations.php
@@ -287,7 +287,7 @@ if ( ! class_exists( 'Translations', false ) ) :
 		 */
 		function set_header( $header, $value ) {
 			parent::set_header( $header, $value );
-			if ( 'Plural-Forms' == $header ) {
+			if ( 'Plural-Forms' === $header ) {
 				list( $nplurals, $expression )     = $this->nplurals_and_expression_from_header( $this->get_header( 'Plural-Forms' ) );
 				$this->_nplurals                   = $nplurals;
 				$this->_gettext_select_plural_form = $this->make_plural_form_function( $nplurals, $expression );
diff --git a/wp-includes/post-formats.php b/wp-includes/post-formats.php
index 65fb9a4e97..d064334b73 100644
--- a/wp-includes/post-formats.php
+++ b/wp-includes/post-formats.php
@@ -192,7 +192,7 @@ function _post_format_request( $qvs ) {
  */
 function _post_format_link( $link, $term, $taxonomy ) {
 	global $wp_rewrite;
-	if ( 'post_format' != $taxonomy ) {
+	if ( 'post_format' !== $taxonomy ) {
 		return $link;
 	}
 	if ( $wp_rewrite->get_extra_permastruct( $taxonomy ) ) {
@@ -232,13 +232,13 @@ function _post_format_get_term( $term ) {
  */
 function _post_format_get_terms( $terms, $taxonomies, $args ) {
 	if ( in_array( 'post_format', (array) $taxonomies, true ) ) {
-		if ( isset( $args['fields'] ) && 'names' == $args['fields'] ) {
+		if ( isset( $args['fields'] ) && 'names' === $args['fields'] ) {
 			foreach ( $terms as $order => $name ) {
 				$terms[ $order ] = get_post_format_string( str_replace( 'post-format-', '', $name ) );
 			}
 		} else {
 			foreach ( (array) $terms as $order => $term ) {
-				if ( isset( $term->taxonomy ) && 'post_format' == $term->taxonomy ) {
+				if ( isset( $term->taxonomy ) && 'post_format' === $term->taxonomy ) {
 					$terms[ $order ]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
 				}
 			}
@@ -258,7 +258,7 @@ function _post_format_get_terms( $terms, $taxonomies, $args ) {
  */
 function _post_format_wp_get_object_terms( $terms ) {
 	foreach ( (array) $terms as $order => $term ) {
-		if ( isset( $term->taxonomy ) && 'post_format' == $term->taxonomy ) {
+		if ( isset( $term->taxonomy ) && 'post_format' === $term->taxonomy ) {
 			$terms[ $order ]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
 		}
 	}
diff --git a/wp-includes/post-template.php b/wp-includes/post-template.php
index e4e945dad5..5f65b6c6f6 100644
--- a/wp-includes/post-template.php
+++ b/wp-includes/post-template.php
@@ -139,7 +139,7 @@ function get_the_title( $post = 0 ) {
 			 */
 			$protected_title_format = apply_filters( 'protected_title_format', $prepend, $post );
 			$title                  = sprintf( $protected_title_format, $title );
-		} elseif ( isset( $post->post_status ) && 'private' == $post->post_status ) {
+		} elseif ( isset( $post->post_status ) && 'private' === $post->post_status ) {
 
 			/* translators: %s: Private post title. */
 			$prepend = __( 'Private: %s' );
@@ -556,7 +556,7 @@ function get_post_class( $class = '', $post_id = null ) {
 				}
 
 				// 'post_tag' uses the 'tag' prefix for backward compatibility.
-				if ( 'post_tag' == $taxonomy ) {
+				if ( 'post_tag' === $taxonomy ) {
 					$classes[] = 'tag-' . $term_class;
 				} else {
 					$classes[] = sanitize_html_class( $taxonomy . '-' . $term_class, $taxonomy . '-' . $term->term_id );
@@ -950,7 +950,7 @@ function wp_link_pages( $args = '' ) {
 
 	$output = '';
 	if ( $multipage ) {
-		if ( 'number' == $parsed_args['next_or_number'] ) {
+		if ( 'number' === $parsed_args['next_or_number'] ) {
 			$output .= $parsed_args['before'];
 			for ( $i = 1; $i <= $numpages; $i++ ) {
 				$link = $parsed_args['link_before'] . str_replace( '%', $i, $parsed_args['pagelink'] ) . $parsed_args['link_after'];
@@ -1032,9 +1032,9 @@ function _wp_link_page( $i ) {
 	if ( 1 == $i ) {
 		$url = get_permalink();
 	} else {
-		if ( '' == get_option( 'permalink_structure' ) || in_array( $post->post_status, array( 'draft', 'pending' ), true ) ) {
+		if ( ! get_option( 'permalink_structure' ) || in_array( $post->post_status, array( 'draft', 'pending' ), true ) ) {
 			$url = add_query_arg( 'page', $i, get_permalink() );
-		} elseif ( 'page' == get_option( 'show_on_front' ) && get_option( 'page_on_front' ) == $post->ID ) {
+		} elseif ( 'page' === get_option( 'show_on_front' ) && get_option( 'page_on_front' ) == $post->ID ) {
 			$url = trailingslashit( get_permalink() ) . user_trailingslashit( "$wp_rewrite->pagination_base/" . $i, 'single_paged' );
 		} else {
 			$url = trailingslashit( get_permalink() ) . user_trailingslashit( $i, 'single_paged' );
@@ -1436,7 +1436,7 @@ function wp_page_menu( $args = array() ) {
 		}
 		$menu .= '<li ' . $class . '><a href="' . home_url( '/' ) . '">' . $args['link_before'] . $text . $args['link_after'] . '</a></li>';
 		// If the front page is a page, add it to the exclude list.
-		if ( get_option( 'show_on_front' ) == 'page' ) {
+		if ( 'page' === get_option( 'show_on_front' ) ) {
 			if ( ! empty( $list_args['exclude'] ) ) {
 				$list_args['exclude'] .= ',';
 			} else {
@@ -1612,7 +1612,7 @@ function wp_get_attachment_link( $id = 0, $size = 'thumbnail', $permalink = fals
 
 	if ( $text ) {
 		$link_text = $text;
-	} elseif ( $size && 'none' != $size ) {
+	} elseif ( $size && 'none' !== $size ) {
 		$link_text = wp_get_attachment_image( $_post->ID, $size, $icon, $attr );
 	} else {
 		$link_text = '';
@@ -1789,7 +1789,7 @@ function get_page_template_slug( $post = null ) {
 
 	$template = get_post_meta( $post->ID, '_wp_page_template', true );
 
-	if ( ! $template || 'default' == $template ) {
+	if ( ! $template || 'default' === $template ) {
 		return '';
 	}
 
diff --git a/wp-includes/post.php b/wp-includes/post.php
index dd549bfcda..a1eefc2e33 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -769,7 +769,7 @@ function get_post( $post = null, $output = OBJECT, $filter = 'raw' ) {
 		if ( empty( $post->filter ) ) {
 			$_post = sanitize_post( $post, 'raw' );
 			$_post = new WP_Post( $_post );
-		} elseif ( 'raw' == $post->filter ) {
+		} elseif ( 'raw' === $post->filter ) {
 			$_post = new WP_Post( $post );
 		} else {
 			$_post = WP_Post::get_instance( $post->ID );
@@ -899,20 +899,20 @@ function get_post_status( $post = null ) {
 		return false;
 	}
 
-	if ( 'attachment' == $post->post_type ) {
-		if ( 'private' == $post->post_status ) {
+	if ( 'attachment' === $post->post_type ) {
+		if ( 'private' === $post->post_status ) {
 			return 'private';
 		}
 
 		// Unattached attachments are assumed to be published.
-		if ( ( 'inherit' == $post->post_status ) && ( 0 == $post->post_parent ) ) {
+		if ( ( 'inherit' === $post->post_status ) && ( 0 == $post->post_parent ) ) {
 			return 'publish';
 		}
 
 		// Inherit status from the parent.
 		if ( $post->post_parent && ( $post->ID != $post->post_parent ) ) {
 			$parent_post_status = get_post_status( $post->post_parent );
-			if ( 'trash' == $parent_post_status ) {
+			if ( 'trash' === $parent_post_status ) {
 				return get_post_meta( $post->post_parent, '_wp_trash_meta_status', true );
 			} else {
 				return $parent_post_status;
@@ -1160,7 +1160,7 @@ function get_post_status_object( $post_status ) {
 function get_post_stati( $args = array(), $output = 'names', $operator = 'and' ) {
 	global $wp_post_statuses;
 
-	$field = ( 'names' == $output ) ? 'name' : false;
+	$field = ( 'names' === $output ) ? 'name' : false;
 
 	return wp_filter_object_list( $wp_post_statuses, $args, $operator, $field );
 }
@@ -1265,7 +1265,7 @@ function get_post_type_object( $post_type ) {
 function get_post_types( $args = array(), $output = 'names', $operator = 'and' ) {
 	global $wp_post_types;
 
-	$field = ( 'names' == $output ) ? 'name' : false;
+	$field = ( 'names' === $output ) ? 'name' : false;
 
 	return wp_filter_object_list( $wp_post_types, $args, $operator, $field );
 }
@@ -2027,7 +2027,7 @@ function get_posts( $args = null ) {
 
 	$parsed_args = wp_parse_args( $args, $defaults );
 	if ( empty( $parsed_args['post_status'] ) ) {
-		$parsed_args['post_status'] = ( 'attachment' == $parsed_args['post_type'] ) ? 'inherit' : 'publish';
+		$parsed_args['post_status'] = ( 'attachment' === $parsed_args['post_type'] ) ? 'inherit' : 'publish';
 	}
 	if ( ! empty( $parsed_args['numberposts'] ) && empty( $parsed_args['posts_per_page'] ) ) {
 		$parsed_args['posts_per_page'] = $parsed_args['numberposts'];
@@ -2381,7 +2381,7 @@ function sanitize_post_field( $field, $value, $post_id, $context = 'display' ) {
 		return $value;
 	}
 
-	if ( 'raw' == $context ) {
+	if ( 'raw' === $context ) {
 		return $value;
 	}
 
@@ -2391,7 +2391,7 @@ function sanitize_post_field( $field, $value, $post_id, $context = 'display' ) {
 		$field_no_prefix = str_replace( 'post_', '', $field );
 	}
 
-	if ( 'edit' == $context ) {
+	if ( 'edit' === $context ) {
 		$format_to_edit = array( 'post_content', 'post_excerpt', 'post_title', 'post_password' );
 
 		if ( $prefixed ) {
@@ -2426,7 +2426,7 @@ function sanitize_post_field( $field, $value, $post_id, $context = 'display' ) {
 		}
 
 		if ( in_array( $field, $format_to_edit, true ) ) {
-			if ( 'post_content' == $field ) {
+			if ( 'post_content' === $field ) {
 				$value = format_to_edit( $value, user_can_richedit() );
 			} else {
 				$value = format_to_edit( $value );
@@ -2434,7 +2434,7 @@ function sanitize_post_field( $field, $value, $post_id, $context = 'display' ) {
 		} else {
 			$value = esc_attr( $value );
 		}
-	} elseif ( 'db' == $context ) {
+	} elseif ( 'db' === $context ) {
 		if ( $prefixed ) {
 
 			/**
@@ -2499,9 +2499,9 @@ function sanitize_post_field( $field, $value, $post_id, $context = 'display' ) {
 			$value = apply_filters( "post_{$field}", $value, $post_id, $context );
 		}
 
-		if ( 'attribute' == $context ) {
+		if ( 'attribute' === $context ) {
 			$value = esc_attr( $value );
-		} elseif ( 'js' == $context ) {
+		} elseif ( 'js' === $context ) {
 			$value = esc_js( $value );
 		}
 	}
@@ -2602,12 +2602,15 @@ function unstick_post( $post_id ) {
  */
 function _count_posts_cache_key( $type = 'post', $perm = '' ) {
 	$cache_key = 'posts-' . $type;
-	if ( 'readable' == $perm && is_user_logged_in() ) {
+
+	if ( 'readable' === $perm && is_user_logged_in() ) {
 		$post_type_object = get_post_type_object( $type );
+
 		if ( $post_type_object && ! current_user_can( $post_type_object->cap->read_private_posts ) ) {
 			$cache_key .= '_' . $perm . '_' . get_current_user_id();
 		}
 	}
+
 	return $cache_key;
 }
 
@@ -2646,7 +2649,8 @@ function wp_count_posts( $type = 'post', $perm = '' ) {
 	}
 
 	$query = "SELECT post_status, COUNT( * ) AS num_posts FROM {$wpdb->posts} WHERE post_type = %s";
-	if ( 'readable' == $perm && is_user_logged_in() ) {
+
+	if ( 'readable' === $perm && is_user_logged_in() ) {
 		$post_type_object = get_post_type_object( $type );
 		if ( ! current_user_can( $post_type_object->cap->read_private_posts ) ) {
 			$query .= $wpdb->prepare(
@@ -2655,6 +2659,7 @@ function wp_count_posts( $type = 'post', $perm = '' ) {
 			);
 		}
 	}
+
 	$query .= ' GROUP BY post_status';
 
 	$results = (array) $wpdb->get_results( $wpdb->prepare( $query, $type ), ARRAY_A );
@@ -3114,7 +3119,8 @@ function wp_delete_post( $postid = 0, $force_delete = false ) {
  */
 function _reset_front_page_settings_for_post( $post_id ) {
 	$post = get_post( $post_id );
-	if ( 'page' == $post->post_type ) {
+
+	if ( 'page' === $post->post_type ) {
 		/*
 		 * If the page is defined in option page_on_front or post_for_posts,
 		 * adjust the corresponding options.
@@ -3127,6 +3133,7 @@ function _reset_front_page_settings_for_post( $post_id ) {
 			update_option( 'page_for_posts', 0 );
 		}
 	}
+
 	unstick_post( $post->ID );
 }
 
@@ -3381,7 +3388,7 @@ function wp_untrash_post_comments( $post = null ) {
 
 	foreach ( $group_by_status as $status => $comments ) {
 		// Sanity check. This shouldn't happen.
-		if ( 'post-trashed' == $status ) {
+		if ( 'post-trashed' === $status ) {
 			$status = '0';
 		}
 		$comments_in = implode( ', ', array_map( 'intval', $comments ) );
@@ -3704,7 +3711,7 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	// Make sure we set a valid category.
 	if ( empty( $post_category ) || 0 == count( $post_category ) || ! is_array( $post_category ) ) {
 		// 'post' requires at least one category.
-		if ( 'post' == $post_type && 'auto-draft' != $post_status ) {
+		if ( 'post' === $post_type && 'auto-draft' !== $post_status ) {
 			$post_category = array( get_option( 'default_category' ) );
 		} else {
 			$post_category = array();
@@ -3748,8 +3755,8 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	 * If the post date is empty (due to having been new or a draft) and status
 	 * is not 'draft' or 'pending', set date to now.
 	 */
-	if ( empty( $postarr['post_date'] ) || '0000-00-00 00:00:00' == $postarr['post_date'] ) {
-		if ( empty( $postarr['post_date_gmt'] ) || '0000-00-00 00:00:00' == $postarr['post_date_gmt'] ) {
+	if ( empty( $postarr['post_date'] ) || '0000-00-00 00:00:00' === $postarr['post_date'] ) {
+		if ( empty( $postarr['post_date_gmt'] ) || '0000-00-00 00:00:00' === $postarr['post_date_gmt'] ) {
 			$post_date = current_time( 'mysql' );
 		} else {
 			$post_date = get_date_from_gmt( $postarr['post_date_gmt'] );
@@ -3771,7 +3778,7 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 		}
 	}
 
-	if ( empty( $postarr['post_date_gmt'] ) || '0000-00-00 00:00:00' == $postarr['post_date_gmt'] ) {
+	if ( empty( $postarr['post_date_gmt'] ) || '0000-00-00 00:00:00' === $postarr['post_date_gmt'] ) {
 		if ( ! in_array( $post_status, get_post_stati( array( 'date_floating' => true ) ), true ) ) {
 			$post_date_gmt = get_gmt_from_date( $post_date );
 		} else {
@@ -3781,7 +3788,7 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 		$post_date_gmt = $postarr['post_date_gmt'];
 	}
 
-	if ( $update || '0000-00-00 00:00:00' == $post_date ) {
+	if ( $update || '0000-00-00 00:00:00' === $post_date ) {
 		$post_modified     = current_time( 'mysql' );
 		$post_modified_gmt = current_time( 'mysql', 1 );
 	} else {
@@ -3833,7 +3840,7 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	}
 
 	$post_password = isset( $postarr['post_password'] ) ? $postarr['post_password'] : '';
-	if ( 'private' == $post_status ) {
+	if ( 'private' === $post_status ) {
 		$post_password = '';
 	}
 
@@ -4027,7 +4034,7 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	$current_guid = get_post_field( 'guid', $post_ID );
 
 	// Set GUID.
-	if ( ! $update && '' == $current_guid ) {
+	if ( ! $update && '' === $current_guid ) {
 		$wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post_ID ) ), $where );
 	}
 
@@ -4069,7 +4076,7 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	if ( ! empty( $postarr['page_template'] ) ) {
 		$post->page_template = $postarr['page_template'];
 		$page_templates      = wp_get_theme()->get_page_templates( $post );
-		if ( 'default' != $postarr['page_template'] && ! isset( $page_templates[ $postarr['page_template'] ] ) ) {
+		if ( 'default' !== $postarr['page_template'] && ! isset( $page_templates[ $postarr['page_template'] ] ) ) {
 			if ( $wp_error ) {
 				return new WP_Error( 'invalid_page_template', __( 'Invalid page template.' ) );
 			}
@@ -4239,7 +4246,7 @@ function wp_update_post( $postarr = array(), $wp_error = false ) {
 	// Drafts shouldn't be assigned a date unless explicitly done so by the user.
 	if ( isset( $post['post_status'] )
 		&& in_array( $post['post_status'], array( 'draft', 'pending', 'auto-draft' ), true )
-		&& empty( $postarr['edit_date'] ) && ( '0000-00-00 00:00:00' == $post['post_date_gmt'] )
+		&& empty( $postarr['edit_date'] ) && ( '0000-00-00 00:00:00' === $post['post_date_gmt'] )
 	) {
 		$clear_date = true;
 	} else {
@@ -4292,7 +4299,7 @@ function wp_publish_post( $post ) {
 		return;
 	}
 
-	if ( 'publish' == $post->post_status ) {
+	if ( 'publish' === $post->post_status ) {
 		return;
 	}
 
@@ -4337,7 +4344,7 @@ function check_and_publish_future_post( $post_id ) {
 		return;
 	}
 
-	if ( 'future' != $post->post_status ) {
+	if ( 'future' !== $post->post_status ) {
 		return;
 	}
 
@@ -4371,7 +4378,7 @@ function check_and_publish_future_post( $post_id ) {
  */
 function wp_unique_post_slug( $slug, $post_ID, $post_status, $post_type, $post_parent ) {
 	if ( in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ), true )
-		|| ( 'inherit' == $post_status && 'revision' == $post_type ) || 'user_request' === $post_type
+		|| ( 'inherit' === $post_status && 'revision' === $post_type ) || 'user_request' === $post_type
 	) {
 		return $slug;
 	}
@@ -4405,7 +4412,7 @@ function wp_unique_post_slug( $slug, $post_ID, $post_status, $post_type, $post_p
 		$feeds = array();
 	}
 
-	if ( 'attachment' == $post_type ) {
+	if ( 'attachment' === $post_type ) {
 		// Attachment slugs must be unique across all types.
 		$check_sql       = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND ID != %d LIMIT 1";
 		$post_name_check = $wpdb->get_var( $wpdb->prepare( $check_sql, $slug, $post_ID ) );
@@ -4433,7 +4440,7 @@ function wp_unique_post_slug( $slug, $post_ID, $post_status, $post_type, $post_p
 			$slug = $alt_post_name;
 		}
 	} elseif ( is_post_type_hierarchical( $post_type ) ) {
-		if ( 'nav_menu_item' == $post_type ) {
+		if ( 'nav_menu_item' === $post_type ) {
 			return $slug;
 		}
 
@@ -4671,13 +4678,13 @@ function wp_set_post_categories( $post_ID = 0, $post_categories = array(), $appe
 	// If $post_categories isn't already an array, make it one:
 	$post_categories = (array) $post_categories;
 	if ( empty( $post_categories ) ) {
-		if ( 'post' == $post_type && 'auto-draft' != $post_status ) {
+		if ( 'post' === $post_type && 'auto-draft' !== $post_status ) {
 			$post_categories = array( get_option( 'default_category' ) );
 			$append          = false;
 		} else {
 			$post_categories = array();
 		}
-	} elseif ( 1 == count( $post_categories ) && '' == reset( $post_categories ) ) {
+	} elseif ( 1 == count( $post_categories ) && '' === reset( $post_categories ) ) {
 		return true;
 	}
 
@@ -4816,7 +4823,7 @@ function get_enclosed( $post_id ) {
 	}
 
 	foreach ( $custom_fields as $key => $val ) {
-		if ( 'enclosure' != $key || ! is_array( $val ) ) {
+		if ( 'enclosure' !== $key || ! is_array( $val ) ) {
 			continue;
 		}
 		foreach ( $val as $enc ) {
@@ -5395,13 +5402,13 @@ function get_pages( $args = array() ) {
 					$post_author = $post_author->ID;
 				}
 
-				if ( '' == $author_query ) {
+				if ( '' === $author_query ) {
 					$author_query = $wpdb->prepare( ' post_author = %d ', $post_author );
 				} else {
 					$author_query .= $wpdb->prepare( ' OR post_author = %d ', $post_author );
 				}
 			}
-			if ( '' != $author_query ) {
+			if ( '' !== $author_query ) {
 				$author_query = " AND ($author_query)";
 			}
 		}
@@ -5593,7 +5600,7 @@ function is_local_attachment( $url ) {
 	$id = url_to_postid( $url );
 	if ( $id ) {
 		$post = get_post( $id );
-		if ( 'attachment' == $post->post_type ) {
+		if ( 'attachment' === $post->post_type ) {
 			return true;
 		}
 	}
@@ -5925,7 +5932,7 @@ function wp_get_attachment_url( $attachment_id = 0 ) {
 		return false;
 	}
 
-	if ( 'attachment' != $post->post_type ) {
+	if ( 'attachment' !== $post->post_type ) {
 		return false;
 	}
 
@@ -6239,7 +6246,7 @@ function wp_mime_type_icon( $mime = 0 ) {
 				if ( $dh ) {
 					while ( false !== $file = readdir( $dh ) ) {
 						$file = wp_basename( $file );
-						if ( substr( $file, 0, 1 ) == '.' ) {
+						if ( '.' === substr( $file, 0, 1 ) ) {
 							continue;
 						}
 
@@ -6701,7 +6708,7 @@ function clean_post_cache( $post ) {
 	 */
 	do_action( 'clean_post_cache', $post->ID, $post );
 
-	if ( 'page' == $post->post_type ) {
+	if ( 'page' === $post->post_type ) {
 		wp_cache_delete( 'all_page_ids', 'posts' );
 
 		/**
@@ -6747,7 +6754,7 @@ function update_post_caches( &$posts, $post_type = 'post', $update_term_cache =
 	if ( $update_term_cache ) {
 		if ( is_array( $post_type ) ) {
 			$ptypes = $post_type;
-		} elseif ( 'any' == $post_type ) {
+		} elseif ( 'any' === $post_type ) {
 			$ptypes = array();
 			// Just use the post_types in the supplied posts.
 			foreach ( $posts as $post ) {
@@ -6847,7 +6854,7 @@ function _transition_post_status( $new_status, $old_status, $post ) {
 
 	if ( 'publish' !== $old_status && 'publish' === $new_status ) {
 		// Reset GUID if transitioning to publish and it is empty.
-		if ( '' == get_the_guid( $post->ID ) ) {
+		if ( '' === get_the_guid( $post->ID ) ) {
 			$wpdb->update( $wpdb->posts, array( 'guid' => get_permalink( $post->ID ) ), array( 'ID' => $post->ID ) );
 		}
 
@@ -6863,7 +6870,7 @@ function _transition_post_status( $new_status, $old_status, $post ) {
 	}
 
 	// If published posts changed clear the lastpostmodified cache.
-	if ( 'publish' == $new_status || 'publish' == $old_status ) {
+	if ( 'publish' === $new_status || 'publish' === $old_status ) {
 		foreach ( array( 'server', 'gmt', 'blog' ) as $timezone ) {
 			wp_cache_delete( "lastpostmodified:$timezone", 'timeinfo' );
 			wp_cache_delete( "lastpostdate:$timezone", 'timeinfo' );
diff --git a/wp-includes/revision.php b/wp-includes/revision.php
index eec6c29700..49c8253cbe 100644
--- a/wp-includes/revision.php
+++ b/wp-includes/revision.php
@@ -122,7 +122,7 @@ function wp_save_post_revision( $post_id ) {
 		return;
 	}
 
-	if ( 'auto-draft' == $post->post_status ) {
+	if ( 'auto-draft' === $post->post_status ) {
 		return;
 	}
 
@@ -308,7 +308,7 @@ function _wp_put_post_revision( $post = null, $autosave = false ) {
 		return new WP_Error( 'invalid_post', __( 'Invalid post ID.' ) );
 	}
 
-	if ( isset( $post['post_type'] ) && 'revision' == $post['post_type'] ) {
+	if ( isset( $post['post_type'] ) && 'revision' === $post['post_type'] ) {
 		return new WP_Error( 'post_type', __( 'Cannot create a revision of a revision' ) );
 	}
 
@@ -616,11 +616,13 @@ function _wp_preview_terms_filter( $terms, $post_id, $taxonomy ) {
 		return $terms;
 	}
 
-	if ( empty( $_REQUEST['post_format'] ) || $post->ID != $post_id || 'post_format' != $taxonomy || 'revision' == $post->post_type ) {
+	if ( empty( $_REQUEST['post_format'] ) || $post->ID != $post_id
+		|| 'post_format' !== $taxonomy || 'revision' === $post->post_type
+	) {
 		return $terms;
 	}
 
-	if ( 'standard' == $_REQUEST['post_format'] ) {
+	if ( 'standard' === $_REQUEST['post_format'] ) {
 		$terms = array();
 	} else {
 		$term = get_term_by( 'slug', 'post-format-' . sanitize_key( $_REQUEST['post_format'] ), 'post_format' );
@@ -652,8 +654,8 @@ function _wp_preview_post_thumbnail_filter( $value, $post_id, $meta_key ) {
 	if ( empty( $_REQUEST['_thumbnail_id'] ) ||
 		empty( $_REQUEST['preview_id'] ) ||
 		$post->ID != $post_id ||
-		'_thumbnail_id' != $meta_key ||
-		'revision' == $post->post_type ||
+		'_thumbnail_id' !== $meta_key ||
+		'revision' === $post->post_type ||
 		$post_id != $_REQUEST['preview_id'] ) {
 
 		return $value;
diff --git a/wp-includes/rewrite.php b/wp-includes/rewrite.php
index c704bdd317..da999719ea 100644
--- a/wp-includes/rewrite.php
+++ b/wp-includes/rewrite.php
@@ -515,7 +515,7 @@ function url_to_postid( $url ) {
 		$url = str_replace( '://www.', '://', $url );
 	}
 
-	if ( trim( $url, '/' ) === home_url() && 'page' == get_option( 'show_on_front' ) ) {
+	if ( trim( $url, '/' ) === home_url() && 'page' === get_option( 'show_on_front' ) ) {
 		$page_on_front = get_option( 'page_on_front' );
 
 		if ( $page_on_front && get_post( $page_on_front ) instanceof WP_Post ) {
diff --git a/wp-includes/shortcodes.php b/wp-includes/shortcodes.php
index 6d784f701a..1d85fa4775 100644
--- a/wp-includes/shortcodes.php
+++ b/wp-includes/shortcodes.php
@@ -63,7 +63,7 @@ $shortcode_tags = array();
 function add_shortcode( $tag, $callback ) {
 	global $shortcode_tags;
 
-	if ( '' == trim( $tag ) ) {
+	if ( '' === trim( $tag ) ) {
 		$message = __( 'Invalid shortcode name: Empty name given.' );
 		_doing_it_wrong( __FUNCTION__, $message, '4.4.0' );
 		return;
@@ -386,7 +386,7 @@ function do_shortcodes_in_html_tags( $content, $ignore_html, $tagnames ) {
 	$textarr = wp_html_split( $content );
 
 	foreach ( $textarr as &$element ) {
-		if ( '' == $element || '<' !== $element[0] ) {
+		if ( '' === $element || '<' !== $element[0] ) {
 			continue;
 		}
 
@@ -511,8 +511,8 @@ function get_shortcode_atts_regex() {
  *
  * @param string $text
  * @return array|string List of attribute values.
- *                      Returns empty array if trim( $text ) == '""'.
- *                      Returns empty string if trim( $text ) == ''.
+ *                      Returns empty array if '""' === trim( $text ).
+ *                      Returns empty string if '' === trim( $text ).
  *                      All other matches are checked for not empty().
  */
 function shortcode_parse_atts( $text ) {
diff --git a/wp-includes/template.php b/wp-includes/template.php
index 447e76bc7a..51a4c86358 100644
--- a/wp-includes/template.php
+++ b/wp-includes/template.php
@@ -668,7 +668,7 @@ function locate_template( $template_names, $load = false, $require_once = true )
 		}
 	}
 
-	if ( $load && '' != $located ) {
+	if ( $load && '' !== $located ) {
 		load_template( $located, $require_once );
 	}
 
diff --git a/wp-includes/theme-compat/comments.php b/wp-includes/theme-compat/comments.php
index d5aa5c928d..2002f8679f 100644
--- a/wp-includes/theme-compat/comments.php
+++ b/wp-includes/theme-compat/comments.php
@@ -16,7 +16,7 @@ _deprecated_file(
 );
 
 // Do not delete these lines.
-if ( ! empty( $_SERVER['SCRIPT_FILENAME'] ) && 'comments.php' == basename( $_SERVER['SCRIPT_FILENAME'] ) ) {
+if ( ! empty( $_SERVER['SCRIPT_FILENAME'] ) && 'comments.php' === basename( $_SERVER['SCRIPT_FILENAME'] ) ) {
 	die( 'Please do not load this page directly. Thanks!' );
 }
 
diff --git a/wp-includes/theme.php b/wp-includes/theme.php
index 3a827d27fe..48ccd29013 100644
--- a/wp-includes/theme.php
+++ b/wp-includes/theme.php
@@ -1156,7 +1156,7 @@ function has_header_image() {
 function get_header_image() {
 	$url = get_theme_mod( 'header_image', get_theme_support( 'custom-header', 'default-image' ) );
 
-	if ( 'remove-header' == $url ) {
+	if ( 'remove-header' === $url ) {
 		return false;
 	}
 
@@ -1265,10 +1265,10 @@ function _get_random_header_data() {
 		$header_image_mod = get_theme_mod( 'header_image', '' );
 		$headers          = array();
 
-		if ( 'random-uploaded-image' == $header_image_mod ) {
+		if ( 'random-uploaded-image' === $header_image_mod ) {
 			$headers = get_uploaded_header_images();
 		} elseif ( ! empty( $_wp_default_headers ) ) {
-			if ( 'random-default-image' == $header_image_mod ) {
+			if ( 'random-default-image' === $header_image_mod ) {
 				$headers = $_wp_default_headers;
 			} else {
 				if ( current_theme_supports( 'custom-header', 'random-default' ) ) {
@@ -1286,6 +1286,7 @@ function _get_random_header_data() {
 		$_wp_random_header->url           = sprintf( $_wp_random_header->url, get_template_directory_uri(), get_stylesheet_directory_uri() );
 		$_wp_random_header->thumbnail_url = sprintf( $_wp_random_header->thumbnail_url, get_template_directory_uri(), get_stylesheet_directory_uri() );
 	}
+
 	return $_wp_random_header;
 }
 
@@ -1298,9 +1299,11 @@ function _get_random_header_data() {
  */
 function get_random_header_image() {
 	$random_image = _get_random_header_data();
+
 	if ( empty( $random_image->url ) ) {
 		return '';
 	}
+
 	return $random_image->url;
 }
 
@@ -1319,14 +1322,17 @@ function get_random_header_image() {
 function is_random_header_image( $type = 'any' ) {
 	$header_image_mod = get_theme_mod( 'header_image', get_theme_support( 'custom-header', 'default-image' ) );
 
-	if ( 'any' == $type ) {
-		if ( 'random-default-image' == $header_image_mod || 'random-uploaded-image' == $header_image_mod || ( '' != get_random_header_image() && empty( $header_image_mod ) ) ) {
+	if ( 'any' === $type ) {
+		if ( 'random-default-image' === $header_image_mod
+			|| 'random-uploaded-image' === $header_image_mod
+			|| ( '' !== get_random_header_image() && empty( $header_image_mod ) )
+		) {
 			return true;
 		}
 	} else {
-		if ( "random-$type-image" == $header_image_mod ) {
+		if ( "random-$type-image" === $header_image_mod ) {
 			return true;
-		} elseif ( 'default' == $type && empty( $header_image_mod ) && '' != get_random_header_image() ) {
+		} elseif ( 'default' === $type && empty( $header_image_mod ) && '' !== get_random_header_image() ) {
 			return true;
 		}
 	}
@@ -1341,6 +1347,7 @@ function is_random_header_image( $type = 'any' ) {
  */
 function header_image() {
 	$image = get_header_image();
+
 	if ( $image ) {
 		echo esc_url( $image );
 	}
@@ -1536,6 +1543,7 @@ function get_header_video_url() {
  */
 function the_header_video_url() {
 	$video = get_header_video_url();
+
 	if ( $video ) {
 		echo esc_url( $video );
 	}
@@ -2903,7 +2911,7 @@ function _remove_theme_support( $feature ) {
 function current_theme_supports( $feature, ...$args ) {
 	global $_wp_theme_features;
 
-	if ( 'custom-header-uploads' == $feature ) {
+	if ( 'custom-header-uploads' === $feature ) {
 		return current_theme_supports( 'custom-header', 'uploads' );
 	}
 
@@ -3074,11 +3082,11 @@ function check_theme_switched() {
  */
 function _wp_customize_include() {
 
-	$is_customize_admin_page = ( is_admin() && 'customize.php' == basename( $_SERVER['PHP_SELF'] ) );
+	$is_customize_admin_page = ( is_admin() && 'customize.php' === basename( $_SERVER['PHP_SELF'] ) );
 	$should_include          = (
 		$is_customize_admin_page
 		||
-		( isset( $_REQUEST['wp_customize'] ) && 'on' == $_REQUEST['wp_customize'] )
+		( isset( $_REQUEST['wp_customize'] ) && 'on' === $_REQUEST['wp_customize'] )
 		||
 		( ! empty( $_GET['customize_changeset_uuid'] ) || ! empty( $_POST['customize_changeset_uuid'] ) )
 	);
diff --git a/wp-includes/user.php b/wp-includes/user.php
index bf9472d8cf..a1e88f2e5a 100644
--- a/wp-includes/user.php
+++ b/wp-includes/user.php
@@ -910,7 +910,7 @@ function count_users( $strategy = 'time', $site_id = null ) {
 	$blog_prefix = $wpdb->get_blog_prefix( $site_id );
 	$result      = array();
 
-	if ( 'time' == $strategy ) {
+	if ( 'time' === $strategy ) {
 		if ( is_multisite() && get_current_blog_id() != $site_id ) {
 			switch_to_blog( $site_id );
 			$avail_roles = wp_roles()->get_names();
@@ -1251,7 +1251,7 @@ function sanitize_user_field( $field, $value, $user_id, $context ) {
 		$value = (int) $value;
 	}
 
-	if ( 'raw' == $context ) {
+	if ( 'raw' === $context ) {
 		return $value;
 	}
 
@@ -1261,7 +1261,7 @@ function sanitize_user_field( $field, $value, $user_id, $context ) {
 
 	$prefixed = false !== strpos( $field, 'user_' );
 
-	if ( 'edit' == $context ) {
+	if ( 'edit' === $context ) {
 		if ( $prefixed ) {
 
 			/** This filter is documented in wp-includes/post.php */
@@ -1282,12 +1282,12 @@ function sanitize_user_field( $field, $value, $user_id, $context ) {
 			$value = apply_filters( "edit_user_{$field}", $value, $user_id );
 		}
 
-		if ( 'description' == $field ) {
+		if ( 'description' === $field ) {
 			$value = esc_html( $value ); // textarea_escaped?
 		} else {
 			$value = esc_attr( $value );
 		}
-	} elseif ( 'db' == $context ) {
+	} elseif ( 'db' === $context ) {
 		if ( $prefixed ) {
 			/** This filter is documented in wp-includes/post.php */
 			$value = apply_filters( "pre_{$field}", $value );
@@ -1329,13 +1329,13 @@ function sanitize_user_field( $field, $value, $user_id, $context ) {
 		}
 	}
 
-	if ( 'user_url' == $field ) {
+	if ( 'user_url' === $field ) {
 		$value = esc_url( $value );
 	}
 
-	if ( 'attribute' == $context ) {
+	if ( 'attribute' === $context ) {
 		$value = esc_attr( $value );
-	} elseif ( 'js' == $context ) {
+	} elseif ( 'js' === $context ) {
 		$value = esc_js( $value );
 	}
 	return $value;
@@ -2506,7 +2506,7 @@ function register_new_user( $user_login, $user_email ) {
 	$user_email = apply_filters( 'user_registration_email', $user_email );
 
 	// Check the username.
-	if ( '' == $sanitized_user_login ) {
+	if ( '' === $sanitized_user_login ) {
 		$errors->add( 'empty_username', __( '<strong>Error</strong>: Please enter a username.' ) );
 	} elseif ( ! validate_username( $user_login ) ) {
 		$errors->add( 'invalid_username', __( '<strong>Error</strong>: This username is invalid because it uses illegal characters. Please enter a valid username.' ) );
@@ -2523,7 +2523,7 @@ function register_new_user( $user_login, $user_email ) {
 	}
 
 	// Check the email address.
-	if ( '' == $user_email ) {
+	if ( '' === $user_email ) {
 		$errors->add( 'empty_email', __( '<strong>Error</strong>: Please type your email address.' ) );
 	} elseif ( ! is_email( $user_email ) ) {
 		$errors->add( 'invalid_email', __( '<strong>Error</strong>: The email address isn&#8217;t correct.' ) );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index d78f6e38d0..972099718f 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-alpha-47807';
+$wp_version = '5.5-alpha-47808';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.