WordPress/wp-admin/update-core.php

<?php
/**
 * Update Core administration panel.
 *
 * @package WordPress
 * @subpackage Administration
 */

/** WordPress Administration Bootstrap */
require_once( dirname( __FILE__ ) . '/admin.php' );

wp_enqueue_style( 'plugin-install' );
wp_enqueue_script( 'plugin-install' );
add_thickbox();

if ( is_multisite() && ! is_network_admin() ) {
	wp_redirect( network_admin_url( 'update-core.php' ) );
	exit();
}

if ( ! current_user_can( 'update_core' ) && ! current_user_can( 'update_themes' ) && ! current_user_can( 'update_plugins' ) )
	wp_die( __( 'You do not have sufficient permissions to update this site.' ) );

function list_core_update( $update ) {
	global $wp_local_package, $wpdb;
	static $first_pass = true;

	// Don't show auto-updates in the updates page
	if ( isset( $update->response ) && 'autoupdate' == $update->response )
		return;

	$version_string = ('en_US' == $update->locale && 'en_US' == get_locale() ) ?
			$update->current : sprintf("%s&ndash;<strong>%s</strong>", $update->current, $update->locale);
	$current = false;
	if ( !isset($update->response) || 'latest' == $update->response )
		$current = true;
	$submit = __('Update Now');
	$form_action = 'update-core.php?action=do-core-upgrade';
	$php_version    = phpversion();
	$mysql_version  = $wpdb->db_version();
	$show_buttons = true;
	if ( 'development' == $update->response ) {
		$message = __('You are using a development version of WordPress. You can update to the latest nightly build automatically or download the nightly build and install it manually:');
		$download = __('Download nightly build');
	} else {
		if ( $current ) {
			$message = sprintf(__('You have the latest version of WordPress. You do not need to update. However, if you want to re-install version %s, you can do so automatically or download the package and re-install manually:'), $version_string);
			$submit = __('Re-install Now');
			$form_action = 'update-core.php?action=do-core-reinstall';
		} else {
			$php_compat     = version_compare( $php_version, $update->php_version, '>=' );
			if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )
				$mysql_compat = true;
			else
				$mysql_compat = version_compare( $mysql_version, $update->mysql_version, '>=' );

			if ( !$mysql_compat && !$php_compat )
				$message = sprintf( __('You cannot update because <a href="http://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires PHP version %2$s or higher and MySQL version %3$s or higher. You are running PHP version %4$s and MySQL version %5$s.'), $update->current, $update->php_version, $update->mysql_version, $php_version, $mysql_version );
			elseif ( !$php_compat )
				$message = sprintf( __('You cannot update because <a href="http://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires PHP version %2$s or higher. You are running version %3$s.'), $update->current, $update->php_version, $php_version );
			elseif ( !$mysql_compat )
				$message = sprintf( __('You cannot update because <a href="http://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires MySQL version %2$s or higher. You are running version %3$s.'), $update->current, $update->mysql_version, $mysql_version );
			else
				$message = 	sprintf(__('You can update to <a href="http://codex.wordpress.org/Version_%1$s">WordPress %2$s</a> automatically or download the package and install it manually:'), $update->current, $version_string);
			if ( !$mysql_compat || !$php_compat )
				$show_buttons = false;
		}
		$download = sprintf(__('Download %s'), $version_string);
	}

	echo '<p>';
	echo $message;
	echo '</p>';
	echo '<form method="post" action="' . $form_action . '" name="upgrade" class="upgrade">';
	wp_nonce_field('upgrade-core');
	echo '<p>';
	echo '<input name="version" value="'. esc_attr($update->current) .'" type="hidden"/>';
	echo '<input name="locale" value="'. esc_attr($update->locale) .'" type="hidden"/>';
	if ( $show_buttons ) {
		if ( $first_pass ) {
			submit_button( $submit, $current ? 'button' : 'primary regular', 'upgrade', false );
			$first_pass = false;
		} else {
			submit_button( $submit, 'button', 'upgrade', false );
		}
		echo '&nbsp;<a href="' . esc_url( $update->download ) . '" class="button">' . $download . '</a>&nbsp;';
	}
	if ( 'en_US' != $update->locale )
		if ( !isset( $update->dismissed ) || !$update->dismissed )
			submit_button( __('Hide this update'), 'button', 'dismiss', false );
		else
			submit_button( __('Bring back this update'), 'button', 'undismiss', false );
	echo '</p>';
	if ( 'en_US' != $update->locale && ( !isset($wp_local_package) || $wp_local_package != $update->locale ) )
	    echo '<p class="hint">'.__('This localized version contains both the translation and various other localization fixes. You can skip upgrading if you want to keep your current translation.').'</p>';
	else if ( 'en_US' == $update->locale && get_locale() != 'en_US' ) {
	    echo '<p class="hint">'.sprintf( __('You are about to install WordPress %s <strong>in English (US).</strong> There is a chance this update will break your translation. You may prefer to wait for the localized version to be released.'), $update->response != 'development' ? $update->current : '' ).'</p>';
	}
	echo '</form>';

}

function dismissed_updates() {
	$dismissed = get_core_updates( array( 'dismissed' => true, 'available' => false ) );
	if ( $dismissed ) {

		$show_text = esc_js(__('Show hidden updates'));
		$hide_text = esc_js(__('Hide hidden updates'));
	?>
	<script type="text/javascript">

		jQuery(function($) {
			$('dismissed-updates').show();
			$('#show-dismissed').toggle(function(){$(this).text('<?php echo $hide_text; ?>');}, function() {$(this).text('<?php echo $show_text; ?>')});
			$('#show-dismissed').click(function() { $('#dismissed-updates').toggle('slow');});
		});
	</script>
	<?php
		echo '<p class="hide-if-no-js"><a id="show-dismissed" href="#">'.__('Show hidden updates').'</a></p>';
		echo '<ul id="dismissed-updates" class="core-updates dismissed">';
		foreach( (array) $dismissed as $update) {
			echo '<li>';
			list_core_update( $update );
			echo '</li>';
		}
		echo '</ul>';
	}
}

/**
 * Display upgrade WordPress for downloading latest or upgrading automatically form.
 *
 * @since 2.7
 *
 * @return null
 */
function core_upgrade_preamble() {
	global $wp_version;

	$updates = get_core_updates();

	if ( !isset($updates[0]->response) || 'latest' == $updates[0]->response ) {
		echo '<h3>';
		_e('You have the latest version of WordPress.');
		echo '</h3>';
	} else {
		echo '<div class="updated inline"><p>';
		_e('<strong>Important:</strong> before updating, please <a href="http://codex.wordpress.org/WordPress_Backups">back up your database and files</a>. For help with updates, visit the <a href="http://codex.wordpress.org/Updating_WordPress">Updating WordPress</a> Codex page.');
		echo '</p></div>';

		echo '<h3 class="response">';
		_e( 'An updated version of WordPress is available.' );
		echo '</h3>';
	}

	// This is temporary, for the WordPress 3.7 beta period.
	if ( isset( $updates[0] ) && $updates[0]->response == 'development' ) {
		require ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
		$ssl_support = wp_http_supports( 'ssl' );
		$should_auto_update = WP_Automatic_Upgrader::should_auto_update( 'core', $updates[0], ABSPATH );
		if ( $ssl_support && $should_auto_update ) {
			echo '<div class="updated inline"><p><strong>BETA TESTERS: This install will receive daily auto updates to future beta versions.</strong>';
			if ( get_locale() !== 'en_US' )
				echo ' Translations of importers and default themes will also be updated.';
			echo '</p><p>You will receive an email with debugging output after each update. If something goes wrong, please <a href="http://wordpress.org/support/forum/alphabeta">post in the support forums</a> or <a href="https://core.trac.wordpress.org/">open a bug report</a>.</div>';
		} elseif ( ! $ssl_support ) {
			echo '<div class="error inline"><p><strong>BETA TESTERS:</strong> Your server does not support HTTP requests over SSL. This install will not receive auto updates.</p></div>';
		} elseif ( WP_Automatic_Upgrader::is_vcs_checkout( ABSPATH ) ) {
			echo '<div class="error inline"><p><strong>BETA TESTERS:</strong> This install uses version control (SVN or Git) and thus will not receive auto updates. Try a separate install of WordPress with the <a href="http://wordpress.org/plugins/wordpress-beta-tester/">Beta Tester</a> plugin set to bleeding edge.</p></div>';
		}
	}

	echo '<ul class="core-updates">';
	$alternate = true;
	foreach( (array) $updates as $update ) {
		echo '<li>';
		list_core_update( $update );
		echo '</li>';
	}
	echo '</ul>';
	if ( $updates ) {
		echo '<p>' . __( 'While your site is being updated, it will be in maintenance mode. As soon as your updates are complete, your site will return to normal.' ) . '</p>';
	} else {
		list( $normalized_version ) = explode( '-', $wp_version );
		echo '<p>' . sprintf( __( '<a href="%s">Learn more about WordPress %s</a>.' ), esc_url( self_admin_url( 'about.php' ) ), $normalized_version ) . '</p>';
	}
	dismissed_updates();
}

function list_plugin_updates() {
	global $wp_version;

	$cur_wp_version = preg_replace('/-.*$/', '', $wp_version);

	require_once(ABSPATH . 'wp-admin/includes/plugin-install.php');
	$plugins = get_plugin_updates();
	if ( empty( $plugins ) ) {
		echo '<h3>' . __( 'Plugins' ) . '</h3>';
		echo '<p>' . __( 'Your plugins are all up to date.' ) . '</p>';
		return;
	}
	$form_action = 'update-core.php?action=do-plugin-upgrade';

	$core_updates = get_core_updates();
	if ( !isset($core_updates[0]->response) || 'latest' == $core_updates[0]->response || 'development' == $core_updates[0]->response || version_compare( $core_updates[0]->current, $cur_wp_version, '=') )
		$core_update_version = false;
	else
		$core_update_version = $core_updates[0]->current;
	?>
<h3><?php _e( 'Plugins' ); ?></h3>
<p><?php _e( 'The following plugins have new versions available. Check the ones you want to update and then click &#8220;Update Plugins&#8221;.' ); ?></p>
<form method="post" action="<?php echo esc_url( $form_action ); ?>" name="upgrade-plugins" class="upgrade">
<?php wp_nonce_field('upgrade-core'); ?>
<p><input id="upgrade-plugins" class="button" type="submit" value="<?php esc_attr_e('Update Plugins'); ?>" name="upgrade" /></p>
<table class="widefat" cellspacing="0" id="update-plugins-table">
	<thead>
	<tr>
		<th scope="col" class="manage-column check-column"><input type="checkbox" id="plugins-select-all" /></th>
		<th scope="col" class="manage-column"><label for="plugins-select-all"><?php _e('Select All'); ?></label></th>
	</tr>
	</thead>

	<tfoot>
	<tr>
		<th scope="col" class="manage-column check-column"><input type="checkbox" id="plugins-select-all-2" /></th>
		<th scope="col" class="manage-column"><label for="plugins-select-all-2"><?php _e('Select All'); ?></label></th>
	</tr>
	</tfoot>
	<tbody class="plugins">
<?php
	foreach ( (array) $plugins as $plugin_file => $plugin_data) {
		$info = plugins_api('plugin_information', array('slug' => $plugin_data->update->slug ));
		// Get plugin compat for running version of WordPress.
		if ( isset($info->tested) && version_compare($info->tested, $cur_wp_version, '>=') ) {
			$compat = '<br />' . sprintf(__('Compatibility with WordPress %1$s: 100%% (according to its author)'), $cur_wp_version);
		} elseif ( isset($info->compatibility[$cur_wp_version][$plugin_data->update->new_version]) ) {
			$compat = $info->compatibility[$cur_wp_version][$plugin_data->update->new_version];
			$compat = '<br />' . sprintf(__('Compatibility with WordPress %1$s: %2$d%% (%3$d "works" votes out of %4$d total)'), $cur_wp_version, $compat[0], $compat[2], $compat[1]);
		} else {
			$compat = '<br />' . sprintf(__('Compatibility with WordPress %1$s: Unknown'), $cur_wp_version);
		}
		// Get plugin compat for updated version of WordPress.
		if ( $core_update_version ) {
			if ( isset($info->compatibility[$core_update_version][$plugin_data->update->new_version]) ) {
				$update_compat = $info->compatibility[$core_update_version][$plugin_data->update->new_version];
				$compat .= '<br />' . sprintf(__('Compatibility with WordPress %1$s: %2$d%% (%3$d "works" votes out of %4$d total)'), $core_update_version, $update_compat[0], $update_compat[2], $update_compat[1]);
			} else {
				$compat .= '<br />' . sprintf(__('Compatibility with WordPress %1$s: Unknown'), $core_update_version);
			}
		}
		// Get the upgrade notice for the new plugin version.
		if ( isset($plugin_data->update->upgrade_notice) ) {
			$upgrade_notice = '<br />' . strip_tags($plugin_data->update->upgrade_notice);
		} else {
			$upgrade_notice = '';
		}

		$details_url = self_admin_url('plugin-install.php?tab=plugin-information&plugin=' . $plugin_data->update->slug . '&section=changelog&TB_iframe=true&width=640&height=662');
		$details_text = sprintf(__('View version %1$s details'), $plugin_data->update->new_version);
		$details = sprintf('<a href="%1$s" class="thickbox" title="%2$s">%3$s</a>.', esc_url($details_url), esc_attr($plugin_data->Name), $details_text);

		echo "
	<tr class='active'>
		<th scope='row' class='check-column'><input type='checkbox' name='checked[]' value='" . esc_attr($plugin_file) . "' /></th>
		<td><p><strong>{$plugin_data->Name}</strong><br />" . sprintf(__('You have version %1$s installed. Update to %2$s.'), $plugin_data->Version, $plugin_data->update->new_version) . ' ' . $details . $compat . $upgrade_notice . "</p></td>
	</tr>";
	}
?>
	</tbody>
</table>
<p><input id="upgrade-plugins-2" class="button" type="submit" value="<?php esc_attr_e('Update Plugins'); ?>" name="upgrade" /></p>
</form>
<?php
}

function list_theme_updates() {
	$themes = get_theme_updates();
	if ( empty( $themes ) ) {
		echo '<h3>' . __( 'Themes' ) . '</h3>';
		echo '<p>' . __( 'Your themes are all up to date.' ) . '</p>';
		return;
	}

	$form_action = 'update-core.php?action=do-theme-upgrade';

?>
<h3><?php _e( 'Themes' ); ?></h3>
<p><?php _e( 'The following themes have new versions available. Check the ones you want to update and then click &#8220;Update Themes&#8221;.' ); ?></p>
<p><?php printf( __( '<strong>Please Note:</strong> Any customizations you have made to theme files will be lost. Please consider using <a href="%s">child themes</a> for modifications.' ), __( 'http://codex.wordpress.org/Child_Themes' ) ); ?></p>
<form method="post" action="<?php echo esc_url( $form_action ); ?>" name="upgrade-themes" class="upgrade">
<?php wp_nonce_field('upgrade-core'); ?>
<p><input id="upgrade-themes" class="button" type="submit" value="<?php esc_attr_e('Update Themes'); ?>" name="upgrade" /></p>
<table class="widefat" cellspacing="0" id="update-themes-table">
	<thead>
	<tr>
		<th scope="col" class="manage-column check-column"><input type="checkbox" id="themes-select-all" /></th>
		<th scope="col" class="manage-column"><label for="themes-select-all"><?php _e('Select All'); ?></label></th>
	</tr>
	</thead>

	<tfoot>
	<tr>
		<th scope="col" class="manage-column check-column"><input type="checkbox" id="themes-select-all-2" /></th>
		<th scope="col" class="manage-column"><label for="themes-select-all-2"><?php _e('Select All'); ?></label></th>
	</tr>
	</tfoot>
	<tbody class="plugins">
<?php
	foreach ( $themes as $stylesheet => $theme ) {
		echo "
	<tr class='active'>
		<th scope='row' class='check-column'><input type='checkbox' name='checked[]' value='" . esc_attr( $stylesheet ) . "' /></th>
		<td class='plugin-title'><img src='" . esc_url( $theme->get_screenshot() ) . "' width='85' height='64' style='float:left; padding: 0 5px 5px' /><strong>" . $theme->display('Name') . '</strong> ' . sprintf( __( 'You have version %1$s installed. Update to %2$s.' ), $theme->display('Version'), $theme->update['new_version'] ) . "</td>
	</tr>";
	}
?>
	</tbody>
</table>
<p><input id="upgrade-themes-2" class="button" type="submit" value="<?php esc_attr_e('Update Themes'); ?>" name="upgrade" /></p>
</form>
<?php
}

/**
 * Upgrade WordPress core display.
 *
 * @since 2.7
 *
 * @return null
 */
function do_core_upgrade( $reinstall = false ) {
	global $wp_filesystem;

	include_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';

	if ( $reinstall )
		$url = 'update-core.php?action=do-core-reinstall';
	else
		$url = 'update-core.php?action=do-core-upgrade';
	$url = wp_nonce_url($url, 'upgrade-core');
	if ( false === ($credentials = request_filesystem_credentials($url, '', false, ABSPATH)) )
		return;

	$version = isset( $_POST['version'] )? $_POST['version'] : false;
	$locale = isset( $_POST['locale'] )? $_POST['locale'] : 'en_US';
	$update = find_core_update( $version, $locale );
	if ( !$update )
		return;

	if ( ! WP_Filesystem($credentials, ABSPATH) ) {
		request_filesystem_credentials($url, '', true, ABSPATH); //Failed to connect, Error and request again
		return;
	}
?>
	<div class="wrap">
	<?php screen_icon('tools'); ?>
	<h2><?php _e('Update WordPress'); ?></h2>
<?php
	if ( $wp_filesystem->errors->get_error_code() ) {
		foreach ( $wp_filesystem->errors->get_error_messages() as $message )
			show_message($message);
		echo '</div>';
		return;
	}

	if ( $reinstall )
		$update->response = 'reinstall';

	add_filter( 'update_feedback', 'show_message' );

	$upgrader = new Core_Upgrader();
	$result = $upgrader->upgrade( $update );

	if ( is_wp_error($result) ) {
		show_message($result);
		if ('up_to_date' != $result->get_error_code() )
			show_message( __('Installation Failed') );
		echo '</div>';
		return;
	}

	show_message( __('WordPress updated successfully') );
	show_message( '<span class="hide-if-no-js">' . sprintf( __( 'Welcome to WordPress %1$s. You will be redirected to the About WordPress screen. If not, click <a href="%2$s">here</a>.' ), $result, esc_url( self_admin_url( 'about.php?updated' ) ) ) . '</span>' );
	show_message( '<span class="hide-if-js">' . sprintf( __( 'Welcome to WordPress %1$s. <a href="%2$s">Learn more</a>.' ), $result, esc_url( self_admin_url( 'about.php?updated' ) ) ) . '</span>' );
	?>
	</div>
	<script type="text/javascript">
	window.location = '<?php echo self_admin_url( 'about.php?updated' ); ?>';
	</script>
	<?php
}

function do_dismiss_core_update() {
	$version = isset( $_POST['version'] )? $_POST['version'] : false;
	$locale = isset( $_POST['locale'] )? $_POST['locale'] : 'en_US';
	$update = find_core_update( $version, $locale );
	if ( !$update )
		return;
	dismiss_core_update( $update );
	wp_redirect( wp_nonce_url('update-core.php?action=upgrade-core', 'upgrade-core') );
	exit;
}

function do_undismiss_core_update() {
	$version = isset( $_POST['version'] )? $_POST['version'] : false;
	$locale = isset( $_POST['locale'] )? $_POST['locale'] : 'en_US';
	$update = find_core_update( $version, $locale );
	if ( !$update )
		return;
	undismiss_core_update( $version, $locale );
	wp_redirect( wp_nonce_url('update-core.php?action=upgrade-core', 'upgrade-core') );
	exit;
}

function no_update_actions($actions) {
	return '';
}

$action = isset($_GET['action']) ? $_GET['action'] : 'upgrade-core';

$upgrade_error = false;
if ( ( 'do-theme-upgrade' == $action || ( 'do-plugin-upgrade' == $action && ! isset( $_GET['plugins'] ) ) )
	&& ! isset( $_POST['checked'] ) ) {
	$upgrade_error = $action == 'do-theme-upgrade' ? 'themes' : 'plugins';
	$action = 'upgrade-core';
}

$title = __('WordPress Updates');
$parent_file = 'tools.php';

get_current_screen()->add_help_tab( array(
'id'		=> 'overview',
'title'		=> __('Overview'),
'content'	=>
	'<p>' . __('This screen lets you update to the latest version of WordPress as well as update your themes and plugins from the WordPress.org repository. When updates are available, the number of available updates will appear in a bubble on the left hand menu as a notification.') . '</p>' .
	'<p>' . __('It is very important to keep your WordPress installation up to date for security reasons, so when you see a number appear, make sure you take the time to update, which is an easy process.') . '</p>'
) );

get_current_screen()->add_help_tab( array(
'id'		=> 'how-to-update',
'title'		=> __('How to Update'),
'content'	=>
	'<p>' . __('Updating your WordPress installation is a simple one-click procedure; just click on the Update button when it says a new version is available.') . '</p>' .
	'<p>' . __('To update themes or plugins from this screen, use the checkboxes to make your selection and click on the appropriate Update button. Check the box at the top of the Themes or Plugins section to select all and update them all at once.') . '</p>'
) );

get_current_screen()->set_help_sidebar(
	'<p><strong>' . __('For more information:') . '</strong></p>' .
	'<p>' . __('<a href="http://codex.wordpress.org/Dashboard_Updates_Screen" target="_blank">Documentation on Updating WordPress</a>') . '</p>' .
	'<p>' . __('<a href="http://wordpress.org/support/" target="_blank">Support Forums</a>') . '</p>'
);

if ( 'upgrade-core' == $action ) {

	wp_version_check();
	require_once(ABSPATH . 'wp-admin/admin-header.php');
	?>
	<div class="wrap">
	<?php screen_icon('tools'); ?>
	<h2><?php _e('WordPress Updates'); ?></h2>
	<?php
	if ( $upgrade_error ) {
		echo '<div class="error"><p>';
		if ( $upgrade_error == 'themes' )
			_e('Please select one or more themes to update.');
		else
			_e('Please select one or more plugins to update.');
		echo '</p></div>';
	}

	echo '<p>';
	/* translators: %1 date, %2 time. */
	printf( __('Last checked on %1$s at %2$s.'), date_i18n( get_option( 'date_format' ) ), date_i18n( get_option( 'time_format' ) ) );
	echo ' &nbsp; <a class="button" href="' . esc_url( self_admin_url('update-core.php') ) . '">' . __( 'Check Again' ) . '</a>';
	echo '</p>';

	if ( current_user_can( 'update_core' ) )
		core_upgrade_preamble();
	if ( current_user_can( 'update_plugins' ) )
		list_plugin_updates();
	if ( current_user_can( 'update_themes' ) )
		list_theme_updates();
	do_action('core_upgrade_preamble');
	echo '</div>';
	include(ABSPATH . 'wp-admin/admin-footer.php');

} elseif ( 'do-core-upgrade' == $action || 'do-core-reinstall' == $action ) {

	if ( ! current_user_can( 'update_core' ) )
		wp_die( __( 'You do not have sufficient permissions to update this site.' ) );

	check_admin_referer('upgrade-core');

	// do the (un)dismiss actions before headers,
	// so that they can redirect
	if ( isset( $_POST['dismiss'] ) )
		do_dismiss_core_update();
	elseif ( isset( $_POST['undismiss'] ) )
		do_undismiss_core_update();

	require_once(ABSPATH . 'wp-admin/admin-header.php');
	if ( 'do-core-reinstall' == $action )
		$reinstall = true;
	else
		$reinstall = false;

	if ( isset( $_POST['upgrade'] ) )
		do_core_upgrade($reinstall);

	include(ABSPATH . 'wp-admin/admin-footer.php');

} elseif ( 'do-plugin-upgrade' == $action ) {

	if ( ! current_user_can( 'update_plugins' ) )
		wp_die( __( 'You do not have sufficient permissions to update this site.' ) );

	check_admin_referer('upgrade-core');

	if ( isset( $_GET['plugins'] ) ) {
		$plugins = explode( ',', $_GET['plugins'] );
	} elseif ( isset( $_POST['checked'] ) ) {
		$plugins = (array) $_POST['checked'];
	} else {
		wp_redirect( admin_url('update-core.php') );
		exit;
	}

	$url = 'update.php?action=update-selected&plugins=' . urlencode(implode(',', $plugins));
	$url = wp_nonce_url($url, 'bulk-update-plugins');

	$title = __('Update Plugins');

	require_once(ABSPATH . 'wp-admin/admin-header.php');
	echo '<div class="wrap">';
	screen_icon('plugins');
	echo '<h2>' . esc_html__('Update Plugins') . '</h2>';
	echo "<iframe src='$url' style='width: 100%; height: 100%; min-height: 750px;' frameborder='0'></iframe>";
	echo '</div>';
	include(ABSPATH . 'wp-admin/admin-footer.php');

} elseif ( 'do-theme-upgrade' == $action ) {

	if ( ! current_user_can( 'update_themes' ) )
		wp_die( __( 'You do not have sufficient permissions to update this site.' ) );

	check_admin_referer('upgrade-core');

	if ( isset( $_GET['themes'] ) ) {
		$themes = explode( ',', $_GET['themes'] );
	} elseif ( isset( $_POST['checked'] ) ) {
		$themes = (array) $_POST['checked'];
	} else {
		wp_redirect( admin_url('update-core.php') );
		exit;
	}

	$url = 'update.php?action=update-selected-themes&themes=' . urlencode(implode(',', $themes));
	$url = wp_nonce_url($url, 'bulk-update-themes');

	$title = __('Update Themes');

	require_once(ABSPATH . 'wp-admin/admin-header.php');
	echo '<div class="wrap">';
	screen_icon('themes');
	echo '<h2>' . esc_html__('Update Themes') . '</h2>';
	echo "<iframe src='$url' style='width: 100%; height: 100%; min-height: 750px;' frameborder='0'></iframe>";
	echo '</div>';
	include(ABSPATH . 'wp-admin/admin-footer.php');

} else {
	do_action('update-core-custom_' . $action);
}