Code Modernization: Remove obsolete comments about older PHP versions.

This commit:
* Removes various comments referencing PHP versions which are no longer supported.
* Removes various comments containing “hints” of things to do after a particular PHP version drop. These hints are incorrect/not actionable for various reasons, so have no value:
 * Even though a function could be turned into a closure, removing the function would be a backward compatibility break which is not acceptable, so this suggestion is not actionable.
 * Short ternaries are forbidden by the coding standard exactly to prevent the faulty code suggested in the comment from getting into the codebase.

Follow-up to [1243/tests], [6543], [11816], [29861], [29864], [34928], [35369], [36698], [38694], [50786], [58678].

Props jrf, ayeshrajans.
See #61574.
Built from https://develop.svn.wordpress.org/trunk@58682


git-svn-id: http://core.svn.wordpress.org/trunk@58084 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/meta-boxes.php

@@ -1270,7 +1270,7 @@ function xfn_check( $xfn_relationship, $xfn_value = '', $deprecated = '' ) {
 		_deprecated_argument( __FUNCTION__, '2.5.0' ); // Never implemented.
 	}
 
-	$link_rel  = isset( $link->link_rel ) ? $link->link_rel : ''; // In PHP 5.3: $link_rel = $link->link_rel ?: '';
+	$link_rel  = isset( $link->link_rel ) ? $link->link_rel : '';
 	$link_rels = preg_split( '/\s+/', $link_rel );
 
 	// Mark the specified value as checked if it matches the current link's relationship.

wp-includes/class-wp-customize-manager.php

@@ -6141,8 +6141,7 @@ final class WP_Customize_Manager {
 	 * This method exists because the partial object and context data are passed
 	 * into a partial's render_callback so we cannot use get_custom_logo() as
 	 * the render_callback directly since it expects a blog ID as the first
-	 * argument. When WP no longer supports PHP 5.3, this method can be removed
-	 * in favor of an anonymous function.
+	 * argument.
 	 *
 	 * @see WP_Customize_Manager::register_controls()
 	 *

wp-includes/class-wp-object-cache.php

@@ -73,7 +73,7 @@ class WP_Object_Cache {
 	private $multisite;
 
 	/**
-	 * Sets up object properties; PHP 5 style constructor.
+	 * Sets up object properties.
 	 *
 	 * @since 2.0.8
 	 */

wp-includes/http.php

@@ -699,12 +699,8 @@ function ms_allowed_http_request_hosts( $is_external, $host ) {
  * A wrapper for PHP's parse_url() function that handles consistency in the return values
  * across PHP versions.
  *
- * PHP 5.4.7 expanded parse_url()'s ability to handle non-absolute URLs, including
- * schemeless and relative URLs with "://" in the path. This function works around
- * those limitations providing a standard output on PHP 5.2~5.4+.
- *
- * Secondly, across various PHP versions, schemeless URLs containing a ":" in the query
- * are being handled inconsistently. This function works around those differences as well.
+ * Across various PHP versions, schemeless URLs containing a ":" in the query
+ * are being handled inconsistently. This function works around those differences.
  *
  * @since 4.4.0
  * @since 4.7.0 The `$component` parameter was added for parity with PHP's `parse_url()`.

wp-includes/load.php

@@ -453,8 +453,6 @@ function wp_is_maintenance_mode() {
 /**
  * Gets the time elapsed so far during this PHP script.
  *
- * Uses REQUEST_TIME_FLOAT that appeared in PHP 5.4.0.
- *
  * @since 5.8.0
  *
  * @return float Seconds since the PHP script started.

wp-includes/rest-api/class-wp-rest-request.php

@@ -709,7 +709,7 @@ class WP_REST_Request implements ArrayAccess {
 	 * Parses the request body parameters.
 	 *
 	 * Parses out URL-encoded bodies for request methods that aren't supported
-	 * natively by PHP. In PHP 5.x, only POST has these parsed automatically.
+	 * natively by PHP.
 	 *
 	 * @since 4.4.0
 	 */

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.7-alpha-58681';
+$wp_version = '6.7-alpha-58682';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.