enmi-conf.org: comparison wp/wp-admin/includes/plugin.php

equal deleted inserted replaced

-:c7c34916027a
+:177826044cd9
 *     Description: Plugin Description
 *     Author: Plugin author's name
 *     Author URI: Link to the author's web site
 *     Version: Must be set in the plugin for WordPress 2.3+
 *     Text Domain: Optional. Unique identifier, should be same as the one used in
-*    		load_plugin_textdomain()
+*          load_plugin_textdomain()
 *     Domain Path: Optional. Only useful if the translations are located in a
-*    		folder above the plugin's base path. For example, if .mo files are
+*          folder above the plugin's base path. For example, if .mo files are
-*    		located in the locale folder then Domain Path will be "/locale/" and
+*          located in the locale folder then Domain Path will be "/locale/" and
-*    		must have the first slash. Defaults to the base folder the plugin is
+*          must have the first slash. Defaults to the base folder the plugin is
-*    		located in.
+*          located in.
 *     Network: Optional. Specify "Network: true" to require that a plugin is activated
-*    		across all sites in an installation. This will prevent a plugin from being
+*          across all sites in an installation. This will prevent a plugin from being
-*    		activated on a single site when Multisite is enabled.
+*          activated on a single site when Multisite is enabled.
 *      * / # Remove the space to close comment
 *
 * Some users have issues with opening large files and manipulating the contents
 * for want is usually the first 1kiB or 2kiB. This function stops pulling in
 * the plugin contents when it has all of the required plugin data.
 * the file. This is not checked however and the file is only opened for
 * reading.
 *
 * @since 1.5.0
 *
-* @param string $plugin_file Path to the main plugin file.
+* @param string $plugin_file Absolute path to the main plugin file.
 * @param bool   $markup      Optional. If the returned data should have HTML markup applied.
 *                            Default true.
 * @param bool   $translate   Optional. If the returned data should be translated. Default true.
 * @return array {
 *     Plugin data. Values will be empty if not supplied by the plugin.
 * }
 */
 function get_plugin_data( $plugin_file, $markup = true, $translate = true ) {
 	$default_headers = array(
-		'Name' => 'Plugin Name',
+		'Name'        => 'Plugin Name',
-		'PluginURI' => 'Plugin URI',
+		'PluginURI'   => 'Plugin URI',
-		'Version' => 'Version',
+		'Version'     => 'Version',
 		'Description' => 'Description',
-		'Author' => 'Author',
+		'Author'      => 'Author',
-		'AuthorURI' => 'Author URI',
+		'AuthorURI'   => 'Author URI',
-		'TextDomain' => 'Text Domain',
+		'TextDomain'  => 'Text Domain',
-		'DomainPath' => 'Domain Path',
+		'DomainPath'  => 'Domain Path',
-		'Network' => 'Network',
+		'Network'     => 'Network',
 		// Site Wide Only is deprecated in favor of Network.
-		'_sitewide' => 'Site Wide Only',
+		'_sitewide'   => 'Site Wide Only',
 	);
 	$plugin_data = get_file_data( $plugin_file, $default_headers, 'plugin' );
 	// Site Wide Only is the old header for Network
 /**
 * Sanitizes plugin data, optionally adds markup, optionally translates.
 *
 * @since 2.7.0
+*
+* @see get_plugin_data()
+*
 * @access private
-* @see get_plugin_data()
+*
+* @param string $plugin_file Path to the main plugin file.
+* @param array  $plugin_data An array of plugin data. See `get_plugin_data()`.
+* @param bool   $markup      Optional. If the returned data should have HTML markup applied.
+*                            Default true.
+* @param bool   $translate   Optional. If the returned data should be translated. Default true.
+* @return array {
+*     Plugin data. Values will be empty if not supplied by the plugin.
+*
+*     @type string $Name        Name of the plugin. Should be unique.
+*     @type string $Title       Title of the plugin and link to the plugin's site (if set).
+*     @type string $Description Plugin description.
+*     @type string $Author      Author's name.
+*     @type string $AuthorURI   Author's website address (if set).
+*     @type string $Version     Plugin version.
+*     @type string $TextDomain  Plugin textdomain.
+*     @type string $DomainPath  Plugins relative directory path to .mo files.
+*     @type bool   $Network     Whether the plugin can only be activated network-wide.
+* }
 */
 function _get_plugin_data_markup_translate( $plugin_file, $plugin_data, $markup = true, $translate = true ) {
 	// Sanitize the plugin filename to a WP_PLUGIN_DIR relative path
 	$plugin_file = plugin_basename( $plugin_file );
 			}
 		} elseif ( 'hello.php' == basename( $plugin_file ) ) {
 			$textdomain = 'default';
 		}
 		if ( $textdomain ) {
-			foreach ( array( 'Name', 'PluginURI', 'Description', 'Author', 'AuthorURI', 'Version' ) as $field )
+			foreach ( array( 'Name', 'PluginURI', 'Description', 'Author', 'AuthorURI', 'Version' ) as $field ) {
+				// phpcs:ignore WordPress.WP.I18n.LowLevelTranslationFunction,WordPress.WP.I18n.NonSingularStringLiteralText,WordPress.WP.I18n.NonSingularStringLiteralDomain
 				$plugin_data[ $field ] = translate( $plugin_data[ $field ], $textdomain );
+			}
 		}
 	}
 	// Sanitize fields
-	$allowed_tags = $allowed_tags_in_links = array(
+	$allowed_tags_in_links = array(
 		'abbr'    => array( 'title' => true ),
 		'acronym' => array( 'title' => true ),
 		'code'    => true,
 		'em'      => true,
 		'strong'  => true,
 	);
-	$allowed_tags['a'] = array( 'href' => true, 'title' => true );
+	$allowed_tags      = $allowed_tags_in_links;
+	$allowed_tags['a'] = array(
+		'href'  => true,
+		'title' => true,
+	);
 	// Name is marked up inside <a> tags. Don't allow these.
 	// Author is too, but some plugins have used <a> here (omitting Author URI).
-	$plugin_data['Name']        = wp_kses( $plugin_data['Name'],        $allowed_tags_in_links );
+	$plugin_data['Name']   = wp_kses( $plugin_data['Name'], $allowed_tags_in_links );
-	$plugin_data['Author']      = wp_kses( $plugin_data['Author'],      $allowed_tags );
+	$plugin_data['Author'] = wp_kses( $plugin_data['Author'], $allowed_tags );
 	$plugin_data['Description'] = wp_kses( $plugin_data['Description'], $allowed_tags );
-	$plugin_data['Version']     = wp_kses( $plugin_data['Version'],     $allowed_tags );
+	$plugin_data['Version']     = wp_kses( $plugin_data['Version'], $allowed_tags );
-	$plugin_data['PluginURI']   = esc_url( $plugin_data['PluginURI'] );
+	$plugin_data['PluginURI'] = esc_url( $plugin_data['PluginURI'] );
-	$plugin_data['AuthorURI']   = esc_url( $plugin_data['AuthorURI'] );
+	$plugin_data['AuthorURI'] = esc_url( $plugin_data['AuthorURI'] );
 	$plugin_data['Title']      = $plugin_data['Name'];
 	$plugin_data['AuthorName'] = $plugin_data['Author'];
 	// Apply markup
 	if ( $markup ) {
-		if ( $plugin_data['PluginURI'] && $plugin_data['Name'] )
+		if ( $plugin_data['PluginURI'] && $plugin_data['Name'] ) {
 			$plugin_data['Title'] = '<a href="' . $plugin_data['PluginURI'] . '">' . $plugin_data['Name'] . '</a>';
+		}
-		if ( $plugin_data['AuthorURI'] && $plugin_data['Author'] )
+		if ( $plugin_data['AuthorURI'] && $plugin_data['Author'] ) {
 			$plugin_data['Author'] = '<a href="' . $plugin_data['AuthorURI'] . '">' . $plugin_data['Author'] . '</a>';
+		}
 		$plugin_data['Description'] = wptexturize( $plugin_data['Description'] );
-		if ( $plugin_data['Author'] )
+		if ( $plugin_data['Author'] ) {
-			$plugin_data['Description'] .= ' <cite>' . sprintf( __('By %s.'), $plugin_data['Author'] ) . '</cite>';
+			$plugin_data['Description'] .= ' <cite>' . sprintf( __( 'By %s.' ), $plugin_data['Author'] ) . '</cite>';
+		}
 	}
 	return $plugin_data;
 }
 /**
 * Get a list of a plugin's files.
 *
 * @since 2.8.0
 *
-* @param string $plugin Path to the main plugin file from plugins directory.
+* @param string $plugin Path to the plugin file relative to the plugins directory.
 * @return array List of files relative to the plugin root.
 */
 function get_plugin_files( $plugin ) {
 	$plugin_file = WP_PLUGIN_DIR . '/' . $plugin;
-	$dir = dirname( $plugin_file );
+	$dir         = dirname( $plugin_file );
 	$plugin_files = array( plugin_basename( $plugin_file ) );
 	if ( is_dir( $dir ) && WP_PLUGIN_DIR !== $dir ) {
 		/**
 		 * Filters the array of excluded directories and files while scanning the folder.
 		 *
 		 * @since 4.9.0
 		 *
-		 * @param array $exclusions Array of excluded directories and files.
+		 * @param string[] $exclusions Array of excluded directories and files.
 		 */
 		$exclusions = (array) apply_filters( 'plugin_files_exclusions', array( 'CVS', 'node_modules', 'vendor', 'bower_components' ) );
 		$list_files = list_files( $dir, 100, $exclusions );
 		$list_files = array_map( 'plugin_basename', $list_files );
 * @since 1.5.0
 *
 * @param string $plugin_folder Optional. Relative path to single plugin folder.
 * @return array Key is the plugin file path and the value is an array of the plugin data.
 */
-function get_plugins($plugin_folder = '') {
+function get_plugins( $plugin_folder = '' ) {
-	if ( ! $cache_plugins = wp_cache_get('plugins', 'plugins') )
+	$cache_plugins = wp_cache_get( 'plugins', 'plugins' );
+	if ( ! $cache_plugins ) {
 		$cache_plugins = array();
+	}
-	if ( isset($cache_plugins[ $plugin_folder ]) )
+	if ( isset( $cache_plugins[ $plugin_folder ] ) ) {
 		return $cache_plugins[ $plugin_folder ];
+	}
-	$wp_plugins = array ();
+	$wp_plugins  = array();
 	$plugin_root = WP_PLUGIN_DIR;
-	if ( !empty($plugin_folder) )
+	if ( ! empty( $plugin_folder ) ) {
 		$plugin_root .= $plugin_folder;
+	}
 	// Files in wp-content/plugins directory
-	$plugins_dir = @ opendir( $plugin_root);
+	$plugins_dir  = @ opendir( $plugin_root );
 	$plugin_files = array();
 	if ( $plugins_dir ) {
-		while (($file = readdir( $plugins_dir ) ) !== false ) {
+		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 ( is_dir( $plugin_root . '/' . $file ) ) {
+				$plugins_subdir = @ opendir( $plugin_root . '/' . $file );
 				if ( $plugins_subdir ) {
-					while (($subfile = readdir( $plugins_subdir ) ) !== false ) {
+					while ( ( $subfile = readdir( $plugins_subdir ) ) !== false ) {
-						if ( substr($subfile, 0, 1) == '.' )
+						if ( substr( $subfile, 0, 1 ) == '.' ) {
 							continue;
-						if ( substr($subfile, -4) == '.php' )
+						}
+						if ( substr( $subfile, -4 ) == '.php' ) {
 							$plugin_files[] = "$file/$subfile";
+						}
 					}
 					closedir( $plugins_subdir );
 				}
 			} else {
-				if ( substr($file, -4) == '.php' )
+				if ( substr( $file, -4 ) == '.php' ) {
 					$plugin_files[] = $file;
+				}
 			}
 		}
 		closedir( $plugins_dir );
 	}
-	if ( empty($plugin_files) )
+	if ( empty( $plugin_files ) ) {
 		return $wp_plugins;
+	}
 	foreach ( $plugin_files as $plugin_file ) {
-		if ( !is_readable( "$plugin_root/$plugin_file" ) )
+		if ( ! is_readable( "$plugin_root/$plugin_file" ) ) {
 			continue;
+		}
 		$plugin_data = get_plugin_data( "$plugin_root/$plugin_file", false, false ); //Do not apply markup/translate as it'll be cached.
-		if ( empty ( $plugin_data['Name'] ) )
+		if ( empty( $plugin_data['Name'] ) ) {
 			continue;
+		}
-		$wp_plugins[plugin_basename( $plugin_file )] = $plugin_data;
+		$wp_plugins[ plugin_basename( $plugin_file ) ] = $plugin_data;
 	}
 	uasort( $wp_plugins, '_sort_uname_callback' );
 	$cache_plugins[ $plugin_folder ] = $wp_plugins;
-	wp_cache_set('plugins', $cache_plugins, 'plugins');
+	wp_cache_set( 'plugins', $cache_plugins, 'plugins' );
 	return $wp_plugins;
 }
 /**
 function get_mu_plugins() {
 	$wp_plugins = array();
 	// Files in wp-content/mu-plugins directory
 	$plugin_files = array();
-	if ( ! is_dir( WPMU_PLUGIN_DIR ) )
+	if ( ! is_dir( WPMU_PLUGIN_DIR ) ) {
 		return $wp_plugins;
+	}
 	if ( $plugins_dir = @ opendir( WPMU_PLUGIN_DIR ) ) {
 		while ( ( $file = readdir( $plugins_dir ) ) !== false ) {
-			if ( substr( $file, -4 ) == '.php' )
+			if ( substr( $file, -4 ) == '.php' ) {
 				$plugin_files[] = $file;
+			}
 		}
 	} else {
 		return $wp_plugins;
 	}
 	@closedir( $plugins_dir );
-	if ( empty($plugin_files) )
+	if ( empty( $plugin_files ) ) {
 		return $wp_plugins;
+	}
 	foreach ( $plugin_files as $plugin_file ) {
-		if ( !is_readable( WPMU_PLUGIN_DIR . "/$plugin_file" ) )
+		if ( ! is_readable( WPMU_PLUGIN_DIR . "/$plugin_file" ) ) {
 			continue;
+		}
 		$plugin_data = get_plugin_data( WPMU_PLUGIN_DIR . "/$plugin_file", false, false ); //Do not apply markup/translate as it'll be cached.
-		if ( empty ( $plugin_data['Name'] ) )
+		if ( empty( $plugin_data['Name'] ) ) {
 			$plugin_data['Name'] = $plugin_file;
+		}
 		$wp_plugins[ $plugin_file ] = $plugin_data;
 	}
-	if ( isset( $wp_plugins['index.php'] ) && filesize( WPMU_PLUGIN_DIR . '/index.php') <= 30 ) // silence is golden
+	if ( isset( $wp_plugins['index.php'] ) && filesize( WPMU_PLUGIN_DIR . '/index.php' ) <= 30 ) { // silence is golden
 		unset( $wp_plugins['index.php'] );
+	}
 	uasort( $wp_plugins, '_sort_uname_callback' );
 	return $wp_plugins;
 }
 /**
 * Callback to sort array by a 'Name' key.
 *
 * @since 3.1.0
+*
 * @access private
+*
+* @param array $a array with 'Name' key.
+* @param array $b array with 'Name' key.
+* @return int Return 0 or 1 based on two string comparison.
 */
 function _sort_uname_callback( $a, $b ) {
 	return strnatcasecmp( $a['Name'], $b['Name'] );
 }
 *
 * @since 3.0.0
 * @return array Key is the file path and the value is an array of the plugin data.
 */
 function get_dropins() {
-	$dropins = array();
+	$dropins      = array();
 	$plugin_files = array();
 	$_dropins = _get_dropins();
 	// These exist in the wp-content directory
 	if ( $plugins_dir = @ opendir( WP_CONTENT_DIR ) ) {
 		while ( ( $file = readdir( $plugins_dir ) ) !== false ) {
-			if ( isset( $_dropins[ $file ] ) )
+			if ( isset( $_dropins[ $file ] ) ) {
 				$plugin_files[] = $file;
+			}
 		}
 	} else {
 		return $dropins;
 	}
 	@closedir( $plugins_dir );
-	if ( empty($plugin_files) )
+	if ( empty( $plugin_files ) ) {
 		return $dropins;
+	}
 	foreach ( $plugin_files as $plugin_file ) {
-		if ( !is_readable( WP_CONTENT_DIR . "/$plugin_file" ) )
+		if ( ! is_readable( WP_CONTENT_DIR . "/$plugin_file" ) ) {
 			continue;
+		}
 		$plugin_data = get_plugin_data( WP_CONTENT_DIR . "/$plugin_file", false, false ); //Do not apply markup/translate as it'll be cached.
-		if ( empty( $plugin_data['Name'] ) )
+		if ( empty( $plugin_data['Name'] ) ) {
 			$plugin_data['Name'] = $plugin_file;
+		}
 		$dropins[ $plugin_file ] = $plugin_data;
 	}
 	uksort( $dropins, 'strnatcasecmp' );
 *
 * Includes Multisite drop-ins only when is_multisite()
 *
 * @since 3.0.0
 * @return array Key is file name. The value is an array, with the first value the
-*	purpose of the drop-in and the second value the name of the constant that must be
+*  purpose of the drop-in and the second value the name of the constant that must be
-*	true for the drop-in to be used, or true if no constant is required.
+*  true for the drop-in to be used, or true if no constant is required.
 */
 function _get_dropins() {
 	$dropins = array(
-		'advanced-cache.php' => array( __( 'Advanced caching plugin.'       ), 'WP_CACHE' ), // WP_CACHE
+		'advanced-cache.php'      => array( __( 'Advanced caching plugin.' ), 'WP_CACHE' ), // WP_CACHE
-		'db.php'             => array( __( 'Custom database class.'         ), true ), // auto on load
+		'db.php'                  => array( __( 'Custom database class.' ), true ), // auto on load
-		'db-error.php'       => array( __( 'Custom database error message.' ), true ), // auto on error
+		'db-error.php'            => array( __( 'Custom database error message.' ), true ), // auto on error
-		'install.php'        => array( __( 'Custom installation script.'    ), true ), // auto on installation
+		'install.php'             => array( __( 'Custom installation script.' ), true ), // auto on installation
-		'maintenance.php'    => array( __( 'Custom maintenance message.'    ), true ), // auto on maintenance
+		'maintenance.php'         => array( __( 'Custom maintenance message.' ), true ), // auto on maintenance
-		'object-cache.php'   => array( __( 'External object cache.'         ), true ), // auto on load
+		'object-cache.php'        => array( __( 'External object cache.' ), true ), // auto on load
+		'php-error.php'           => array( __( 'Custom PHP error message.' ), true ), // auto on error
+		'fatal-error-handler.php' => array( __( 'Custom PHP fatal error handler.' ), true ), // auto on error
 	);
 	if ( is_multisite() ) {
-		$dropins['sunrise.php'       ] = array( __( 'Executed before Multisite is loaded.' ), 'SUNRISE' ); // SUNRISE
+		$dropins['sunrise.php']        = array( __( 'Executed before Multisite is loaded.' ), 'SUNRISE' ); // SUNRISE
-		$dropins['blog-deleted.php'  ] = array( __( 'Custom site deleted message.'   ), true ); // auto on deleted blog
+		$dropins['blog-deleted.php']   = array( __( 'Custom site deleted message.' ), true ); // auto on deleted blog
-		$dropins['blog-inactive.php' ] = array( __( 'Custom site inactive message.'  ), true ); // auto on inactive blog
+		$dropins['blog-inactive.php']  = array( __( 'Custom site inactive message.' ), true ); // auto on inactive blog
 		$dropins['blog-suspended.php'] = array( __( 'Custom site suspended message.' ), true ); // auto on archived or spammed blog
 	}
 	return $dropins;
 }
 /**
-* Check whether a plugin is active.
+* Determines whether a plugin is active.
 *
 * Only plugins installed in the plugins/ folder can be active.
 *
 * Plugins in the mu-plugins/ folder can't be "activated," so this function will
 * return false for those plugins.
 *
+* For more information on this and similar theme functions, check out
+* the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
+* Conditional Tags} article in the Theme Developer Handbook.
+*
 * @since 2.5.0
 *
-* @param string $plugin Path to the main plugin file from plugins directory.
+* @param string $plugin Path to the plugin file relative to the plugins directory.
 * @return bool True, if in the active plugins list. False, not in the list.
 */
 function is_plugin_active( $plugin ) {
 	return in_array( $plugin, (array) get_option( 'active_plugins', array() ) ) || is_plugin_active_for_network( $plugin );
 }
 /**
-* Check whether the plugin is inactive.
+* Determines whether the plugin is inactive.
 *
 * Reverse of is_plugin_active(). Used as a callback.
+*
+* For more information on this and similar theme functions, check out
+* the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
+* Conditional Tags} article in the Theme Developer Handbook.
 *
 * @since 3.1.0
 * @see is_plugin_active()
 *
-* @param string $plugin Path to the main plugin file from plugins directory.
+* @param string $plugin Path to the plugin file relative to the plugins directory.
 * @return bool True if inactive. False if active.
 */
 function is_plugin_inactive( $plugin ) {
 	return ! is_plugin_active( $plugin );
 }
 /**
-* Check whether the plugin is active for the entire network.
+* Determines whether the plugin is active for the entire network.
 *
 * Only plugins installed in the plugins/ folder can be active.
 *
 * Plugins in the mu-plugins/ folder can't be "activated," so this function will
 * return false for those plugins.
 *
+* For more information on this and similar theme functions, check out
+* the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
+* Conditional Tags} article in the Theme Developer Handbook.
+*
 * @since 3.0.0
 *
-* @param string $plugin Path to the main plugin file from plugins directory.
+* @param string $plugin Path to the plugin file relative to the plugins directory.
-* @return bool True, if active for the network, otherwise false.
+* @return bool True if active for the network, otherwise false.
 */
 function is_plugin_active_for_network( $plugin ) {
-	if ( !is_multisite() )
+	if ( ! is_multisite() ) {
 		return false;
+	}
-	$plugins = get_site_option( 'active_sitewide_plugins');
-	if ( isset($plugins[$plugin]) )
+	$plugins = get_site_option( 'active_sitewide_plugins' );
+	if ( isset( $plugins[ $plugin ] ) ) {
 		return true;
+	}
 	return false;
 }
 /**
 *
 * Checks for "Site Wide Only: true" for backward compatibility.
 *
 * @since 3.0.0
 *
-* @param string $plugin Path to the main plugin file from plugins directory.
+* @param string $plugin Path to the plugin file relative to the plugins directory.
 * @return bool True if plugin is network only, false otherwise.
 */
 function is_network_only_plugin( $plugin ) {
 	$plugin_data = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin );
-	if ( $plugin_data )
+	if ( $plugin_data ) {
 		return $plugin_data['Network'];
+	}
 	return false;
 }
 /**
 * Attempts activation of plugin in a "sandbox" and redirects on success.
 *
 * If any errors are found or text is outputted, then it will be captured to
 * ensure that the success redirection will update the error redirection.
 *
 * @since 2.5.0
-*
+* @since 5.2.0 Test for WordPress version and PHP version compatibility.
-* @param string $plugin       Path to the main plugin file from plugins directory.
+*
+* @param string $plugin       Path to the plugin file relative to the plugins directory.
 * @param string $redirect     Optional. URL to redirect to.
 * @param bool   $network_wide Optional. Whether to enable the plugin for all sites in the network
 *                             or just the current site. Multisite only. Default false.
 * @param bool   $silent       Optional. Whether to prevent calling activation hooks. Default false.
 * @return WP_Error|null WP_Error on invalid file or null on success.
 */
 function activate_plugin( $plugin, $redirect = '', $network_wide = false, $silent = false ) {
 	$plugin = plugin_basename( trim( $plugin ) );
-	if ( is_multisite() && ( $network_wide || is_network_only_plugin($plugin) ) ) {
+	if ( is_multisite() && ( $network_wide || is_network_only_plugin( $plugin ) ) ) {
-		$network_wide = true;
+		$network_wide        = true;
-		$current = get_site_option( 'active_sitewide_plugins', array() );
+		$current             = get_site_option( 'active_sitewide_plugins', array() );
 		$_GET['networkwide'] = 1; // Back compat for plugins looking for this value.
 	} else {
 		$current = get_option( 'active_plugins', array() );
 	}
-	$valid = validate_plugin($plugin);
+	$valid = validate_plugin( $plugin );
-	if ( is_wp_error($valid) )
+	if ( is_wp_error( $valid ) ) {
 		return $valid;
+	}
+	$requirements = validate_plugin_requirements( $plugin );
+	if ( is_wp_error( $requirements ) ) {
+		return $requirements;
+	}
 	if ( ( $network_wide && ! isset( $current[ $plugin ] ) ) || ( ! $network_wide && ! in_array( $plugin, $current ) ) ) {
-		if ( !empty($redirect) )
+		if ( ! empty( $redirect ) ) {
-			wp_redirect(add_query_arg('_error_nonce', wp_create_nonce('plugin-activation-error_' . $plugin), $redirect)); // we'll override this later if the plugin can be included without fatal error
+			wp_redirect( add_query_arg( '_error_nonce', wp_create_nonce( 'plugin-activation-error_' . $plugin ), $redirect ) ); // we'll override this later if the plugin can be included without fatal error
+		}
 		ob_start();
 		wp_register_plugin_realpath( WP_PLUGIN_DIR . '/' . $plugin );
 		$_wp_plugin_file = $plugin;
+		if ( ! defined( 'WP_SANDBOX_SCRAPING' ) ) {
+			define( 'WP_SANDBOX_SCRAPING', true );
+		}
 		include_once( WP_PLUGIN_DIR . '/' . $plugin );
 		$plugin = $_wp_plugin_file; // Avoid stomping of the $plugin variable in a plugin.
 		if ( ! $silent ) {
 			/**
 			 * If a plugin is silently activated (such as during an update),
 			 * this hook does not fire.
 			 *
 			 * @since 2.9.0
 			 *
-			 * @param string $plugin       Path to the main plugin file from plugins directory.
+			 * @param string $plugin       Path to the plugin file relative to the plugins directory.
 			 * @param bool   $network_wide Whether to enable the plugin for all sites in the network
 			 *                             or just the current site. Multisite only. Default is false.
 			 */
 			do_action( 'activate_plugin', $plugin, $network_wide );
 			 */
 			do_action( "activate_{$plugin}", $network_wide );
 		}
 		if ( $network_wide ) {
-			$current = get_site_option( 'active_sitewide_plugins', array() );
+			$current            = get_site_option( 'active_sitewide_plugins', array() );
-			$current[$plugin] = time();
+			$current[ $plugin ] = time();
 			update_site_option( 'active_sitewide_plugins', $current );
 		} else {
-			$current = get_option( 'active_plugins', array() );
+			$current   = get_option( 'active_plugins', array() );
 			$current[] = $plugin;
-			sort($current);
+			sort( $current );
-			update_option('active_plugins', $current);
+			update_option( 'active_plugins', $current );
 		}
 		if ( ! $silent ) {
 			/**
 			 * Fires after a plugin has been activated.
 			 * If a plugin is silently activated (such as during an update),
 			 * this hook does not fire.
 			 *
 			 * @since 2.9.0
 			 *
-			 * @param string $plugin       Path to the main plugin file from plugins directory.
+			 * @param string $plugin       Path to the plugin file relative to the plugins directory.
 			 * @param bool   $network_wide Whether to enable the plugin for all sites in the network
 			 *                             or just the current site. Multisite only. Default is false.
 			 */
 			do_action( 'activated_plugin', $plugin, $network_wide );
 		}
 		if ( ob_get_length() > 0 ) {
 			$output = ob_get_clean();
-			return new WP_Error('unexpected_output', __('The plugin generated unexpected output.'), $output);
+			return new WP_Error( 'unexpected_output', __( 'The plugin generated unexpected output.' ), $output );
 		}
 		ob_end_clean();
 	}
 	return null;
 * @since 2.5.0
 *
 * @param string|array $plugins Single plugin or list of plugins to deactivate.
 * @param bool $silent Prevent calling deactivation hooks. Default is false.
 * @param mixed $network_wide Whether to deactivate the plugin for all sites in the network.
-* 	A value of null (the default) will deactivate plugins for both the site and the network.
+*  A value of null (the default) will deactivate plugins for both the site and the network.
 */
 function deactivate_plugins( $plugins, $silent = false, $network_wide = null ) {
-	if ( is_multisite() )
+	if ( is_multisite() ) {
 		$network_current = get_site_option( 'active_sitewide_plugins', array() );
+	}
 	$current = get_option( 'active_plugins', array() );
 	$do_blog = $do_network = false;
 	foreach ( (array) $plugins as $plugin ) {
 		$plugin = plugin_basename( trim( $plugin ) );
-		if ( ! is_plugin_active($plugin) )
+		if ( ! is_plugin_active( $plugin ) ) {
 			continue;
+		}
 		$network_deactivating = false !== $network_wide && is_plugin_active_for_network( $plugin );
 		if ( ! $silent ) {
 			/**
 			 * If a plugin is silently deactivated (such as during an update),
 			 * this hook does not fire.
 			 *
 			 * @since 2.9.0
 			 *
-			 * @param string $plugin               Path to the main plugin file from plugins directory.
+			 * @param string $plugin               Path to the plugin file relative to the plugins directory.
 			 * @param bool   $network_deactivating Whether the plugin is deactivated for all sites in the network
 			 *                                     or just the current site. Multisite only. Default is false.
 			 */
 			do_action( 'deactivate_plugin', $plugin, $network_deactivating );
 		}
 			$key = array_search( $plugin, $current );
 			if ( false !== $key ) {
 				$do_blog = true;
 				unset( $current[ $key ] );
 			}
+		}
+		if ( $do_blog && wp_is_recovery_mode() ) {
+			list( $extension ) = explode( '/', $plugin );
+			wp_paused_plugins()->delete( $extension );
 		}
 		if ( ! $silent ) {
 			/**
 			 * Fires as a specific plugin is being deactivated.
 			 * If a plugin is silently deactivated (such as during an update),
 			 * this hook does not fire.
 			 *
 			 * @since 2.9.0
 			 *
-			 * @param string $plugin               Path to the main plugin file from plugins directory.
+			 * @param string $plugin               Path to the plugin file relative to the plugins directory.
 			 * @param bool   $network_deactivating Whether the plugin is deactivated for all sites in the network.
 			 *                                     or just the current site. Multisite only. Default false.
 			 */
 			do_action( 'deactivated_plugin', $plugin, $network_deactivating );
 		}
 	}
-	if ( $do_blog )
+	if ( $do_blog ) {
-		update_option('active_plugins', $current);
+		update_option( 'active_plugins', $current );
-	if ( $do_network )
+	}
+	if ( $do_network ) {
 		update_site_option( 'active_sitewide_plugins', $network_current );
+	}
 }
 /**
 * Activate multiple plugins.
 *
 * @param bool $network_wide Whether to enable the plugin for all sites in the network.
 * @param bool $silent Prevent calling activation hooks. Default is false.
 * @return bool|WP_Error True when finished or WP_Error if there were errors during a plugin activation.
 */
 function activate_plugins( $plugins, $redirect = '', $network_wide = false, $silent = false ) {
-	if ( !is_array($plugins) )
+	if ( ! is_array( $plugins ) ) {
-		$plugins = array($plugins);
+		$plugins = array( $plugins );
+	}
 	$errors = array();
 	foreach ( $plugins as $plugin ) {
-		if ( !empty($redirect) )
+		if ( ! empty( $redirect ) ) {
-			$redirect = add_query_arg('plugin', $plugin, $redirect);
+			$redirect = add_query_arg( 'plugin', $plugin, $redirect );
-		$result = activate_plugin($plugin, $redirect, $network_wide, $silent);
+		}
-		if ( is_wp_error($result) )
+		$result = activate_plugin( $plugin, $redirect, $network_wide, $silent );
-			$errors[$plugin] = $result;
+		if ( is_wp_error( $result ) ) {
-	}
+			$errors[ $plugin ] = $result;
+		}
-	if ( !empty($errors) )
+	}
-		return new WP_Error('plugins_invalid', __('One of the plugins is invalid.'), $errors);
+	if ( ! empty( $errors ) ) {
+		return new WP_Error( 'plugins_invalid', __( 'One of the plugins is invalid.' ), $errors );
+	}
 	return true;
 }
 /**
 * Remove directory and files of a plugin for a list of plugins.
 *
 * @since 2.6.0
 *
-* @global WP_Filesystem_Base $wp_filesystem
+* @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
 *
-* @param array  $plugins    List of plugins to delete.
+* @param string[] $plugins    List of plugin paths to delete, relative to the plugins directory.
-* @param string $deprecated Deprecated.
+* @param string   $deprecated Not used.
-* @return bool|null|WP_Error True on success, false is $plugins is empty, WP_Error on failure.
+* @return bool|null|WP_Error True on success, false if `$plugins` is empty, `WP_Error` on failure.
-*                            Null if filesystem credentials are required to proceed.
+*                            `null` if filesystem credentials are required to proceed.
 */
 function delete_plugins( $plugins, $deprecated = '' ) {
 	global $wp_filesystem;
-	if ( empty($plugins) )
+	if ( empty( $plugins ) ) {
 		return false;
+	}
 	$checked = array();
-	foreach ( $plugins as $plugin )
+	foreach ( $plugins as $plugin ) {
 		$checked[] = 'checked[]=' . $plugin;
+	}
-	$url = wp_nonce_url('plugins.php?action=delete-selected&verify-delete=1&' . implode('&', $checked), 'bulk-plugins');
+	$url = wp_nonce_url( 'plugins.php?action=delete-selected&verify-delete=1&' . implode( '&', $checked ), 'bulk-plugins' );
 	ob_start();
 	$credentials = request_filesystem_credentials( $url );
-	$data = ob_get_clean();
+	$data        = ob_get_clean();
 	if ( false === $credentials ) {
-		if ( ! empty($data) ){
+		if ( ! empty( $data ) ) {
-			include_once( ABSPATH . 'wp-admin/admin-header.php');
+			include_once( ABSPATH . 'wp-admin/admin-header.php' );
 			echo $data;
-			include( ABSPATH . 'wp-admin/admin-footer.php');
+			include( ABSPATH . 'wp-admin/admin-footer.php' );
 			exit;
 		}
 		return;
 	}
 	if ( ! WP_Filesystem( $credentials ) ) {
 		ob_start();
 		request_filesystem_credentials( $url, '', true ); // Failed to connect, Error and request again.
 		$data = ob_get_clean();
-		if ( ! empty($data) ){
+		if ( ! empty( $data ) ) {
-			include_once( ABSPATH . 'wp-admin/admin-header.php');
+			include_once( ABSPATH . 'wp-admin/admin-header.php' );
 			echo $data;
-			include( ABSPATH . 'wp-admin/admin-footer.php');
+			include( ABSPATH . 'wp-admin/admin-footer.php' );
 			exit;
 		}
 		return;
 	}
-	if ( ! is_object($wp_filesystem) )
+	if ( ! is_object( $wp_filesystem ) ) {
-		return new WP_Error('fs_unavailable', __('Could not access filesystem.'));
+		return new WP_Error( 'fs_unavailable', __( 'Could not access filesystem.' ) );
+	}
-	if ( is_wp_error($wp_filesystem->errors) && $wp_filesystem->errors->get_error_code() )
-		return new WP_Error('fs_error', __('Filesystem error.'), $wp_filesystem->errors);
+	if ( is_wp_error( $wp_filesystem->errors ) && $wp_filesystem->errors->has_errors() ) {
+		return new WP_Error( 'fs_error', __( 'Filesystem error.' ), $wp_filesystem->errors );
+	}
 	// Get the base plugin folder.
 	$plugins_dir = $wp_filesystem->wp_plugins_dir();
 	if ( empty( $plugins_dir ) ) {
 		return new WP_Error( 'fs_no_plugins_dir', __( 'Unable to locate WordPress plugin directory.' ) );
 	$errors = array();
 	foreach ( $plugins as $plugin_file ) {
 		// Run Uninstall hook.
 		if ( is_uninstallable_plugin( $plugin_file ) ) {
-			uninstall_plugin($plugin_file);
+			uninstall_plugin( $plugin_file );
 		}
 		/**
 		 * Fires immediately before a plugin deletion attempt.
 		 *
 		 * @since 4.4.0
 		 *
-		 * @param string $plugin_file Plugin file name.
+		 * @param string $plugin_file Path to the plugin file relative to the plugins directory.
 		 */
 		do_action( 'delete_plugin', $plugin_file );
 		$this_plugin_dir = trailingslashit( dirname( $plugins_dir . $plugin_file ) );
 		/**
 		 * Fires immediately after a plugin deletion attempt.
 		 *
 		 * @since 4.4.0
 		 *
-		 * @param string $plugin_file Plugin file name.
+		 * @param string $plugin_file Path to the plugin file relative to the plugins directory.
 		 * @param bool   $deleted     Whether the plugin deletion was successful.
 		 */
 		do_action( 'deleted_plugin', $plugin_file, $deleted );
 		if ( ! $deleted ) {
 			$translations = $plugin_translations[ $plugin_slug ];
 			foreach ( $translations as $translation => $data ) {
 				$wp_filesystem->delete( WP_LANG_DIR . '/plugins/' . $plugin_slug . '-' . $translation . '.po' );
 				$wp_filesystem->delete( WP_LANG_DIR . '/plugins/' . $plugin_slug . '-' . $translation . '.mo' );
+				$json_translation_files = glob( WP_LANG_DIR . '/plugins/' . $plugin_slug . '-' . $translation . '-*.json' );
+				if ( $json_translation_files ) {
+					array_map( array( $wp_filesystem, 'delete' ), $json_translation_files );
+				}
 			}
 		}
 	}
 	// Remove deleted plugins from the plugin updates list.
-	if ( $current = get_site_transient('update_plugins') ) {
+	if ( $current = get_site_transient( 'update_plugins' ) ) {
 		// Don't remove the plugins that weren't deleted.
 		$deleted = array_diff( $plugins, $errors );
 		foreach ( $deleted as $plugin_file ) {
 			unset( $current->response[ $plugin_file ] );
 		$plugins = array();
 	}
 	if ( is_multisite() && current_user_can( 'manage_network_plugins' ) ) {
 		$network_plugins = (array) get_site_option( 'active_sitewide_plugins', array() );
-		$plugins = array_merge( $plugins, array_keys( $network_plugins ) );
+		$plugins         = array_merge( $plugins, array_keys( $network_plugins ) );
 	}
-	if ( empty( $plugins ) )
+	if ( empty( $plugins ) ) {
 		return array();
+	}
 	$invalid = array();
 	// Invalid plugins get deactivated.
 	foreach ( $plugins as $plugin ) {
 		$result = validate_plugin( $plugin );
 		if ( is_wp_error( $result ) ) {
-			$invalid[$plugin] = $result;
+			$invalid[ $plugin ] = $result;
 			deactivate_plugins( $plugin, true );
 		}
 	}
 	return $invalid;
 }
 *
 * Checks that the main plugin file exists and is a valid plugin. See validate_file().
 *
 * @since 2.5.0
 *
-* @param string $plugin Path to the main plugin file from plugins directory.
+* @param string $plugin Path to the plugin file relative to the plugins directory.
 * @return WP_Error|int 0 on success, WP_Error on failure.
 */
-function validate_plugin($plugin) {
+function validate_plugin( $plugin ) {
-	if ( validate_file($plugin) )
+	if ( validate_file( $plugin ) ) {
-		return new WP_Error('plugin_invalid', __('Invalid plugin path.'));
+		return new WP_Error( 'plugin_invalid', __( 'Invalid plugin path.' ) );
-	if ( ! file_exists(WP_PLUGIN_DIR . '/' . $plugin) )
+	}
-		return new WP_Error('plugin_not_found', __('Plugin file does not exist.'));
+	if ( ! file_exists( WP_PLUGIN_DIR . '/' . $plugin ) ) {
+		return new WP_Error( 'plugin_not_found', __( 'Plugin file does not exist.' ) );
+	}
 	$installed_plugins = get_plugins();
-	if ( ! isset($installed_plugins[$plugin]) )
+	if ( ! isset( $installed_plugins[ $plugin ] ) ) {
-		return new WP_Error('no_plugin_header', __('The plugin does not have a valid header.'));
+		return new WP_Error( 'no_plugin_header', __( 'The plugin does not have a valid header.' ) );
+	}
 	return 0;
 }
 /**
+* Validate the plugin requirements for WP version and PHP version.
+*
+* @since 5.2.0
+*
+* @param string $plugin Path to the plugin file relative to the plugins directory.
+* @return true|WP_Error True if requirements are met, WP_Error on failure.
+*/
+function validate_plugin_requirements( $plugin ) {
+	$readme_file = WP_PLUGIN_DIR . '/' . dirname( $plugin ) . '/readme.txt';
+	if ( file_exists( $readme_file ) ) {
+		$plugin_data = get_file_data(
+			$readme_file,
+			array(
+				'requires'     => 'Requires at least',
+				'requires_php' => 'Requires PHP',
+			),
+			'plugin'
+		);
+	} else {
+		return true;
+	}
+	$plugin_data['wp_compatible']  = is_wp_version_compatible( $plugin_data['requires'] );
+	$plugin_data['php_compatible'] = is_php_version_compatible( $plugin_data['requires_php'] );
+	$plugin_data = array_merge( $plugin_data, get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin ) );
+	if ( ! $plugin_data['wp_compatible'] && ! $plugin_data['php_compatible'] ) {
+		return new WP_Error(
+			'plugin_wp_php_incompatible',
+			sprintf(
+				/* translators: %s: plugin name */
+				__( '<strong>Error:</strong> Current WordPress and PHP versions do not meet minimum requirements for %s.' ),
+				$plugin_data['Name']
+			)
+		);
+	} elseif ( ! $plugin_data['php_compatible'] ) {
+		return new WP_Error(
+			'plugin_php_incompatible',
+			sprintf(
+				/* translators: %s: plugin name */
+				__( '<strong>Error:</strong> Current PHP version does not meet minimum requirements for %s.' ),
+				$plugin_data['Name']
+			)
+		);
+	} elseif ( ! $plugin_data['wp_compatible'] ) {
+		return new WP_Error(
+			'plugin_wp_incompatible',
+			sprintf(
+				/* translators: %s: plugin name */
+				__( '<strong>Error:</strong> Current WordPress version does not meet minimum requirements for %s.' ),
+				$plugin_data['Name']
+			)
+		);
+	}
+	return true;
+}
+/**
 * Whether the plugin can be uninstalled.
 *
 * @since 2.7.0
 *
-* @param string $plugin Path to the main plugin file from plugins directory.
+* @param string $plugin Path to the plugin file relative to the plugins directory.
 * @return bool Whether plugin can be uninstalled.
 */
-function is_uninstallable_plugin($plugin) {
+function is_uninstallable_plugin( $plugin ) {
-	$file = plugin_basename($plugin);
+	$file = plugin_basename( $plugin );
-	$uninstallable_plugins = (array) get_option('uninstall_plugins');
+	$uninstallable_plugins = (array) get_option( 'uninstall_plugins' );
-	if ( isset( $uninstallable_plugins[$file] ) || file_exists( WP_PLUGIN_DIR . '/' . dirname($file) . '/uninstall.php' ) )
+	if ( isset( $uninstallable_plugins[ $file ] ) || file_exists( WP_PLUGIN_DIR . '/' . dirname( $file ) . '/uninstall.php' ) ) {
 		return true;
+	}
 	return false;
 }
 /**
 *
 * Calls the uninstall hook, if it is available.
 *
 * @since 2.7.0
 *
-* @param string $plugin Path to the main plugin file from plugins directory.
+* @param string $plugin Path to the plugin file relative to the plugins directory.
 * @return true True if a plugin's uninstall.php file has been found and included.
 */
-function uninstall_plugin($plugin) {
+function uninstall_plugin( $plugin ) {
-	$file = plugin_basename($plugin);
+	$file = plugin_basename( $plugin );
-	$uninstallable_plugins = (array) get_option('uninstall_plugins');
+	$uninstallable_plugins = (array) get_option( 'uninstall_plugins' );
 	/**
 	 * Fires in uninstall_plugin() immediately before the plugin is uninstalled.
 	 *
 	 * @since 4.5.0
 	 *
-	 * @param string $plugin                Path to the main plugin file from plugins directory.
+	 * @param string $plugin                Path to the plugin file relative to the plugins directory.
 	 * @param array  $uninstallable_plugins Uninstallable plugins.
 	 */
 	do_action( 'pre_uninstall_plugin', $plugin, $uninstallable_plugins );
-	if ( file_exists( WP_PLUGIN_DIR . '/' . dirname($file) . '/uninstall.php' ) ) {
+	if ( file_exists( WP_PLUGIN_DIR . '/' . dirname( $file ) . '/uninstall.php' ) ) {
-		if ( isset( $uninstallable_plugins[$file] ) ) {
+		if ( isset( $uninstallable_plugins[ $file ] ) ) {
-			unset($uninstallable_plugins[$file]);
+			unset( $uninstallable_plugins[ $file ] );
-			update_option('uninstall_plugins', $uninstallable_plugins);
+			update_option( 'uninstall_plugins', $uninstallable_plugins );
 		}
-		unset($uninstallable_plugins);
+		unset( $uninstallable_plugins );
-		define('WP_UNINSTALL_PLUGIN', $file);
+		define( 'WP_UNINSTALL_PLUGIN', $file );
 		wp_register_plugin_realpath( WP_PLUGIN_DIR . '/' . $file );
-		include( WP_PLUGIN_DIR . '/' . dirname($file) . '/uninstall.php' );
+		include( WP_PLUGIN_DIR . '/' . dirname( $file ) . '/uninstall.php' );
 		return true;
 	}
-	if ( isset( $uninstallable_plugins[$file] ) ) {
+	if ( isset( $uninstallable_plugins[ $file ] ) ) {
-		$callable = $uninstallable_plugins[$file];
+		$callable = $uninstallable_plugins[ $file ];
-		unset($uninstallable_plugins[$file]);
+		unset( $uninstallable_plugins[ $file ] );
-		update_option('uninstall_plugins', $uninstallable_plugins);
+		update_option( 'uninstall_plugins', $uninstallable_plugins );
-		unset($uninstallable_plugins);
+		unset( $uninstallable_plugins );
 		wp_register_plugin_realpath( WP_PLUGIN_DIR . '/' . $file );
 		include( WP_PLUGIN_DIR . '/' . $file );
 		add_action( "uninstall_{$file}", $callable );
 * This function takes a capability which will be used to determine whether
 * or not a page is included in the menu.
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
+*
+* @since 1.5.0
 *
 * @global array $menu
 * @global array $admin_page_hooks
 * @global array $_registered_pages
 * @global array $_parent_pages
 function add_menu_page( $page_title, $menu_title, $capability, $menu_slug, $function = '', $icon_url = '', $position = null ) {
 	global $menu, $admin_page_hooks, $_registered_pages, $_parent_pages;
 	$menu_slug = plugin_basename( $menu_slug );
-	$admin_page_hooks[$menu_slug] = sanitize_title( $menu_title );
+	$admin_page_hooks[ $menu_slug ] = sanitize_title( $menu_title );
 	$hookname = get_plugin_page_hookname( $menu_slug, '' );
-	if ( !empty( $function ) && !empty( $hookname ) && current_user_can( $capability ) )
+	if ( ! empty( $function ) && ! empty( $hookname ) && current_user_can( $capability ) ) {
 		add_action( $hookname, $function );
+	}
-	if ( empty($icon_url) ) {
-		$icon_url = 'dashicons-admin-generic';
+	if ( empty( $icon_url ) ) {
+		$icon_url   = 'dashicons-admin-generic';
 		$icon_class = 'menu-icon-generic ';
 	} else {
-		$icon_url = set_url_scheme( $icon_url );
+		$icon_url   = set_url_scheme( $icon_url );
 		$icon_class = '';
 	}
 	$new_menu = array( $menu_title, $capability, $menu_slug, $page_title, 'menu-top ' . $icon_class . $hookname, $hookname, $icon_url );
 	if ( null === $position ) {
 		$menu[] = $new_menu;
 	} elseif ( isset( $menu[ "$position" ] ) ) {
-	 	$position = $position + substr( base_convert( md5( $menu_slug . $menu_title ), 16, 10 ) , -5 ) * 0.00001;
+		$position            = $position + substr( base_convert( md5( $menu_slug . $menu_title ), 16, 10 ), -5 ) * 0.00001;
 		$menu[ "$position" ] = $new_menu;
 	} else {
 		$menu[ $position ] = $new_menu;
 	}
-	$_registered_pages[$hookname] = true;
+	$_registered_pages[ $hookname ] = true;
 	// No parent as top level
-	$_parent_pages[$menu_slug] = false;
+	$_parent_pages[ $menu_slug ] = false;
 	return $hookname;
 }
 /**
 * This function takes a capability which will be used to determine whether
 * or not a page is included in the menu.
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
+*
+* @since 1.5.0
 *
 * @global array $submenu
 * @global array $menu
 * @global array $_wp_real_parent_file
 * @global bool  $_wp_submenu_nopriv
 */
 function add_submenu_page( $parent_slug, $page_title, $menu_title, $capability, $menu_slug, $function = '' ) {
 	global $submenu, $menu, $_wp_real_parent_file, $_wp_submenu_nopriv,
 		$_registered_pages, $_parent_pages;
-	$menu_slug = plugin_basename( $menu_slug );
+	$menu_slug   = plugin_basename( $menu_slug );
-	$parent_slug = plugin_basename( $parent_slug);
+	$parent_slug = plugin_basename( $parent_slug );
-	if ( isset( $_wp_real_parent_file[$parent_slug] ) )
+	if ( isset( $_wp_real_parent_file[ $parent_slug ] ) ) {
-		$parent_slug = $_wp_real_parent_file[$parent_slug];
+		$parent_slug = $_wp_real_parent_file[ $parent_slug ];
+	}
-	if ( !current_user_can( $capability ) ) {
-		$_wp_submenu_nopriv[$parent_slug][$menu_slug] = true;
+	if ( ! current_user_can( $capability ) ) {
+		$_wp_submenu_nopriv[ $parent_slug ][ $menu_slug ] = true;
 		return false;
 	}
 	/*
 	 * If the parent doesn't already have a submenu, add a link to the parent
 	 * as the first item in the submenu. If the submenu file is the same as the
 	 * parent file someone is trying to link back to the parent manually. In
 	 * this case, don't automatically add a link back to avoid duplication.
 	 */
-	if (!isset( $submenu[$parent_slug] ) && $menu_slug != $parent_slug ) {
+	if ( ! isset( $submenu[ $parent_slug ] ) && $menu_slug != $parent_slug ) {
-		foreach ( (array)$menu as $parent_menu ) {
+		foreach ( (array) $menu as $parent_menu ) {
-			if ( $parent_menu[2] == $parent_slug && current_user_can( $parent_menu[1] ) )
+			if ( $parent_menu[2] == $parent_slug && current_user_can( $parent_menu[1] ) ) {
-				$submenu[$parent_slug][] = array_slice( $parent_menu, 0, 4 );
+				$submenu[ $parent_slug ][] = array_slice( $parent_menu, 0, 4 );
-		}
+			}
-	}
+		}
+	}
-	$submenu[$parent_slug][] = array ( $menu_title, $capability, $menu_slug, $page_title );
+	$submenu[ $parent_slug ][] = array( $menu_title, $capability, $menu_slug, $page_title );
-	$hookname = get_plugin_page_hookname( $menu_slug, $parent_slug);
-	if (!empty ( $function ) && !empty ( $hookname ))
+	$hookname = get_plugin_page_hookname( $menu_slug, $parent_slug );
+	if ( ! empty( $function ) && ! empty( $hookname ) ) {
 		add_action( $hookname, $function );
+	}
-	$_registered_pages[$hookname] = true;
+	$_registered_pages[ $hookname ] = true;
 	/*
-	 * Backward-compatibility for plugins using add_management page.
+	 * Backward-compatibility for plugins using add_management_page().
-	 * See wp-admin/admin.php for redirect from edit.php to tools.php
+	 * 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;
+		$_registered_pages[ get_plugin_page_hookname( $menu_slug, 'edit.php' ) ] = true;
+	}
 	// No parent as top level.
-	$_parent_pages[$menu_slug] = $parent_slug;
+	$_parent_pages[ $menu_slug ] = $parent_slug;
 	return $hookname;
 }
 /**
 * This function takes a capability which will be used to determine whether
 * or not a page is included in the menu.
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
+*
+* @since 1.5.0
 *
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * or not a page is included in the menu.
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
+* @since 1.5.0
+*
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
 * or not a page is included in the menu.
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
+* @since 2.0.0
+*
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
 * or not a page is included in the menu.
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
+* @since 3.0.0
+*
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
 * or not a page is included in the menu.
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
+* @since 2.1.3
+*
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
 * @return false|string The resulting page's hook_suffix, or false if the user does not have the capability required.
 */
 function add_users_page( $page_title, $menu_title, $capability, $menu_slug, $function = '' ) {
-	if ( current_user_can('edit_users') )
+	if ( current_user_can( 'edit_users' ) ) {
 		$parent = 'users.php';
-	else
+	} else {
 		$parent = 'profile.php';
+	}
 	return add_submenu_page( $parent, $page_title, $menu_title, $capability, $menu_slug, $function );
 }
 /**
 * Add submenu page to the Dashboard main menu.
 *
 * This function takes a capability which will be used to determine whether
 * or not a page is included in the menu.
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
+*
+* @since 2.7.0
 *
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * or not a page is included in the menu.
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
+* @since 2.7.0
+*
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
 * or not a page is included in the menu.
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
+* @since 2.7.0
+*
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
 * or not a page is included in the menu.
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
+* @since 2.7.0
+*
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
 * or not a page is included in the menu.
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
+* @since 2.7.0
+*
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
 * or not a page is included in the menu.
 *
 * The function which is hooked in to handle the output of the page must check
 * that the user has the required capability as well.
 *
+* @since 2.7.0
+*
 * @param string   $page_title The text to be displayed in the title tags of the page when the menu is selected.
 * @param string   $menu_title The text to be used for the menu.
 * @param string   $capability The capability required for this menu to be displayed to the user.
 * @param string   $menu_slug  The slug name to refer to this menu by (should be unique for this menu).
 * @param callable $function   The function to be called to output the content for this page.
 function remove_menu_page( $menu_slug ) {
 	global $menu;
 	foreach ( $menu as $i => $item ) {
 		if ( $menu_slug == $item[2] ) {
-			unset( $menu[$i] );
+			unset( $menu[ $i ] );
 			return $item;
 		}
 	}
 	return false;
 * @return array|bool The removed submenu on success, false if not found.
 */
 function remove_submenu_page( $menu_slug, $submenu_slug ) {
 	global $submenu;
-	if ( !isset( $submenu[$menu_slug] ) )
+	if ( ! isset( $submenu[ $menu_slug ] ) ) {
 		return false;
+	}
-	foreach ( $submenu[$menu_slug] as $i => $item ) {
+	foreach ( $submenu[ $menu_slug ] as $i => $item ) {
 		if ( $submenu_slug == $item[2] ) {
-			unset( $submenu[$menu_slug][$i] );
+			unset( $submenu[ $menu_slug ][ $i ] );
 			return $item;
 		}
 	}
 	return false;
 *
 * @param string $menu_slug The slug name to refer to this menu by (should be unique for this menu)
 * @param bool $echo Whether or not to echo the url - default is true
 * @return string the url
 */
-function menu_page_url($menu_slug, $echo = true) {
+function menu_page_url( $menu_slug, $echo = true ) {
 	global $_parent_pages;
-	if ( isset( $_parent_pages[$menu_slug] ) ) {
+	if ( isset( $_parent_pages[ $menu_slug ] ) ) {
-		$parent_slug = $_parent_pages[$menu_slug];
+		$parent_slug = $_parent_pages[ $menu_slug ];
-		if ( $parent_slug && ! isset( $_parent_pages[$parent_slug] ) ) {
+		if ( $parent_slug && ! isset( $_parent_pages[ $parent_slug ] ) ) {
 			$url = admin_url( add_query_arg( 'page', $menu_slug, $parent_slug ) );
 		} else {
 			$url = admin_url( 'admin.php?page=' . $menu_slug );
 		}
 	} else {
 		$url = '';
 	}
-	$url = esc_url($url);
+	$url = esc_url( $url );
-	if ( $echo )
+	if ( $echo ) {
 		echo $url;
+	}
 	return $url;
 }
 //
 // Pluggable Menu Support -- Private
 //
 /**
-*
 * @global string $parent_file
 * @global array $menu
 * @global array $submenu
 * @global string $pagenow
 * @global string $typenow
 * @global string $plugin_page
 * @global array $_wp_real_parent_file
 * @global array $_wp_menu_nopriv
 * @global array $_wp_submenu_nopriv
+*
+* @return string
 */
 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] ) )
+		if ( isset( $_wp_real_parent_file[ $parent ] ) ) {
-			$parent = $_wp_real_parent_file[$parent];
+			$parent = $_wp_real_parent_file[ $parent ];
+		}
 		return $parent;
 	}
 	if ( $pagenow == 'admin.php' && isset( $plugin_page ) ) {
-		foreach ( (array)$menu as $parent_menu ) {
+		foreach ( (array) $menu as $parent_menu ) {
 			if ( $parent_menu[2] == $plugin_page ) {
 				$parent_file = $plugin_page;
-				if ( isset( $_wp_real_parent_file[$parent_file] ) )
+				if ( isset( $_wp_real_parent_file[ $parent_file ] ) ) {
-					$parent_file = $_wp_real_parent_file[$parent_file];
+					$parent_file = $_wp_real_parent_file[ $parent_file ];
+				}
 				return $parent_file;
 			}
 		}
-		if ( isset( $_wp_menu_nopriv[$plugin_page] ) ) {
+		if ( isset( $_wp_menu_nopriv[ $plugin_page ] ) ) {
 			$parent_file = $plugin_page;
-			if ( isset( $_wp_real_parent_file[$parent_file] ) )
+			if ( isset( $_wp_real_parent_file[ $parent_file ] ) ) {
-					$parent_file = $_wp_real_parent_file[$parent_file];
+					$parent_file = $_wp_real_parent_file[ $parent_file ];
+			}
 			return $parent_file;
 		}
 	}
-	if ( isset( $plugin_page ) && isset( $_wp_submenu_nopriv[$pagenow][$plugin_page] ) ) {
+	if ( isset( $plugin_page ) && isset( $_wp_submenu_nopriv[ $pagenow ][ $plugin_page ] ) ) {
 		$parent_file = $pagenow;
-		if ( isset( $_wp_real_parent_file[$parent_file] ) )
+		if ( isset( $_wp_real_parent_file[ $parent_file ] ) ) {
-			$parent_file = $_wp_real_parent_file[$parent_file];
+			$parent_file = $_wp_real_parent_file[ $parent_file ];
+		}
 		return $parent_file;
 	}
-	foreach (array_keys( (array)$submenu ) as $parent) {
+	foreach ( array_keys( (array) $submenu ) as $parent ) {
-		foreach ( $submenu[$parent] as $submenu_array ) {
+		foreach ( $submenu[ $parent ] as $submenu_array ) {
-			if ( isset( $_wp_real_parent_file[$parent] ) )
+			if ( isset( $_wp_real_parent_file[ $parent ] ) ) {
-				$parent = $_wp_real_parent_file[$parent];
+				$parent = $_wp_real_parent_file[ $parent ];
-			if ( !empty($typenow) && ($submenu_array[2] == "$pagenow?post_type=$typenow") ) {
+			}
+			if ( ! empty( $typenow ) && ( $submenu_array[2] == "$pagenow?post_type=$typenow" ) ) {
 				$parent_file = $parent;
 				return $parent;
-			} elseif ( $submenu_array[2] == $pagenow && empty($typenow) && ( empty($parent_file) || false === strpos($parent_file, '?') ) ) {
+			} elseif ( $submenu_array[2] == $pagenow && empty( $typenow ) && ( empty( $parent_file ) || false === strpos( $parent_file, '?' ) ) ) {
 				$parent_file = $parent;
 				return $parent;
-			} elseif ( isset( $plugin_page ) && ($plugin_page == $submenu_array[2] ) ) {
+			} elseif ( isset( $plugin_page ) && ( $plugin_page == $submenu_array[2] ) ) {
 				$parent_file = $parent;
 				return $parent;
 			}
 		}
 	}
-	if ( empty($parent_file) )
+	if ( empty( $parent_file ) ) {
 		$parent_file = '';
+	}
 	return '';
 }
 /**
-*
 * @global string $title
 * @global array $menu
 * @global array $submenu
 * @global string $pagenow
 * @global string $plugin_page
 * @global string $typenow
+*
+* @return string
 */
 function get_admin_page_title() {
 	global $title, $menu, $submenu, $pagenow, $plugin_page, $typenow;
-	if ( ! empty ( $title ) )
+	if ( ! empty( $title ) ) {
 		return $title;
+	}
 	$hook = get_plugin_page_hook( $plugin_page, $pagenow );
 	$parent = $parent1 = get_admin_page_parent();
-	if ( empty ( $parent) ) {
+	if ( empty( $parent ) ) {
-		foreach ( (array)$menu as $menu_array ) {
+		foreach ( (array) $menu as $menu_array ) {
 			if ( isset( $menu_array[3] ) ) {
 				if ( $menu_array[2] == $pagenow ) {
 					$title = $menu_array[3];
 					return $menu_array[3];
-				} elseif ( isset( $plugin_page ) && ($plugin_page == $menu_array[2] ) && ($hook == $menu_array[3] ) ) {
+				} elseif ( isset( $plugin_page ) && ( $plugin_page == $menu_array[2] ) && ( $hook == $menu_array[3] ) ) {
 					$title = $menu_array[3];
 					return $menu_array[3];
 				}
 			} else {
 				$title = $menu_array[0];
 				return $title;
 			}
 		}
 	} else {
 		foreach ( array_keys( $submenu ) as $parent ) {
-			foreach ( $submenu[$parent] as $submenu_array ) {
+			foreach ( $submenu[ $parent ] as $submenu_array ) {
 				if ( isset( $plugin_page ) &&
 					( $plugin_page == $submenu_array[2] ) &&
 					(
 						( $parent == $pagenow ) ||
 						( $parent == $plugin_page ) ||
 						( $plugin_page == $hook ) ||
 						( $pagenow == 'admin.php' && $parent1 != $submenu_array[2] ) ||
-						( !empty($typenow) && $parent == $pagenow . '?post_type=' . $typenow)
+						( ! empty( $typenow ) && $parent == $pagenow . '?post_type=' . $typenow )
 					)
 					) {
 						$title = $submenu_array[3];
 						return $submenu_array[3];
-					}
+				}
-				if ( $submenu_array[2] != $pagenow || isset( $_GET['page'] ) ) // not the current page
+				if ( $submenu_array[2] != $pagenow || isset( $_GET['page'] ) ) { // not the current page
 					continue;
+				}
 				if ( isset( $submenu_array[3] ) ) {
 					$title = $submenu_array[3];
 					return $submenu_array[3];
 				} else {
 					$title = $submenu_array[0];
 					return $title;
 				}
 			}
 		}
-		if ( empty ( $title ) ) {
+		if ( empty( $title ) ) {
 			foreach ( $menu as $menu_array ) {
 				if ( isset( $plugin_page ) &&
 					( $plugin_page == $menu_array[2] ) &&
 					( $pagenow == 'admin.php' ) &&
-					( $parent1 == $menu_array[2] ) )
+					( $parent1 == $menu_array[2] ) ) {
-					{
 						$title = $menu_array[3];
 						return $menu_array[3];
-					}
+				}
 			}
 		}
 	}
 	return $title;
 }
 /**
 * @since 2.3.0
 *
-* @param string $plugin_page
+* @param string $plugin_page The slug name of the plugin page.
-* @param string $parent_page
+* @param string $parent_page The slug name for the parent menu (or the file name of a standard
-* @return string|null
+*                            WordPress admin page).
+* @return string|null Hook attached to the plugin page, null otherwise.
 */
 function get_plugin_page_hook( $plugin_page, $parent_page ) {
 	$hook = get_plugin_page_hookname( $plugin_page, $parent_page );
-	if ( has_action($hook) )
+	if ( has_action( $hook ) ) {
 		return $hook;
-	else
+	} else {
 		return null;
-}
+	}
+}
-/**
-*
+/**
 * @global array $admin_page_hooks
-* @param string $plugin_page
+*
-* @param string $parent_page
+* @param string $plugin_page The slug name of the plugin page.
+* @param string $parent_page The slug name for the parent menu (or the file name of a standard
+*                            WordPress admin page).
+* @return string Hook name for the plugin page.
 */
 function get_plugin_page_hookname( $plugin_page, $parent_page ) {
 	global $admin_page_hooks;
 	$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] ) ) {
+		if ( isset( $admin_page_hooks[ $plugin_page ] ) ) {
 			$page_type = 'toplevel';
-		} elseif ( isset( $admin_page_hooks[$parent] )) {
+		} elseif ( isset( $admin_page_hooks[ $parent ] ) ) {
-			$page_type = $admin_page_hooks[$parent];
+			$page_type = $admin_page_hooks[ $parent ];
 		}
-	} elseif ( isset( $admin_page_hooks[$parent] ) ) {
+	} elseif ( isset( $admin_page_hooks[ $parent ] ) ) {
-		$page_type = $admin_page_hooks[$parent];
+		$page_type = $admin_page_hooks[ $parent ];
 	}
 	$plugin_name = preg_replace( '!\.php!', '', $plugin_page );
 	return $page_type . '_page_' . $plugin_name;
 }
 /**
-*
 * @global string $pagenow
 * @global array $menu
 * @global array $submenu
 * @global array $_wp_menu_nopriv
 * @global array $_wp_submenu_nopriv
 * @global string $plugin_page
 * @global array $_registered_pages
+*
+* @return bool Whether the current user can access the current admin page.
 */
 function user_can_access_admin_page() {
 	global $pagenow, $menu, $submenu, $_wp_menu_nopriv, $_wp_submenu_nopriv,
 		$plugin_page, $_registered_pages;
 	$parent = get_admin_page_parent();
-	if ( !isset( $plugin_page ) && isset( $_wp_submenu_nopriv[$parent][$pagenow] ) )
+	if ( ! isset( $plugin_page ) && isset( $_wp_submenu_nopriv[ $parent ][ $pagenow ] ) ) {
 		return false;
+	}
 	if ( isset( $plugin_page ) ) {
-		if ( isset( $_wp_submenu_nopriv[$parent][$plugin_page] ) )
+		if ( isset( $_wp_submenu_nopriv[ $parent ][ $plugin_page ] ) ) {
 			return false;
+		}
-		$hookname = get_plugin_page_hookname($plugin_page, $parent);
+		$hookname = get_plugin_page_hookname( $plugin_page, $parent );
-		if ( !isset($_registered_pages[$hookname]) )
+		if ( ! isset( $_registered_pages[ $hookname ] ) ) {
 			return false;
-	}
+		}
+	}
-	if ( empty( $parent) ) {
-		if ( isset( $_wp_menu_nopriv[$pagenow] ) )
+	if ( empty( $parent ) ) {
+		if ( isset( $_wp_menu_nopriv[ $pagenow ] ) ) {
 			return false;
-		if ( isset( $_wp_submenu_nopriv[$pagenow][$pagenow] ) )
+		}
+		if ( isset( $_wp_submenu_nopriv[ $pagenow ][ $pagenow ] ) ) {
 			return false;
-		if ( isset( $plugin_page ) && isset( $_wp_submenu_nopriv[$pagenow][$plugin_page] ) )
+		}
+		if ( isset( $plugin_page ) && isset( $_wp_submenu_nopriv[ $pagenow ][ $plugin_page ] ) ) {
 			return false;
-		if ( isset( $plugin_page ) && isset( $_wp_menu_nopriv[$plugin_page] ) )
+		}
+		if ( isset( $plugin_page ) && isset( $_wp_menu_nopriv[ $plugin_page ] ) ) {
 			return false;
-		foreach (array_keys( $_wp_submenu_nopriv ) as $key ) {
+		}
-			if ( isset( $_wp_submenu_nopriv[$key][$pagenow] ) )
+		foreach ( array_keys( $_wp_submenu_nopriv ) as $key ) {
+			if ( isset( $_wp_submenu_nopriv[ $key ][ $pagenow ] ) ) {
 				return false;
-			if ( isset( $plugin_page ) && isset( $_wp_submenu_nopriv[$key][$plugin_page] ) )
+			}
-			return false;
+			if ( isset( $plugin_page ) && isset( $_wp_submenu_nopriv[ $key ][ $plugin_page ] ) ) {
+				return false;
+			}
 		}
 		return true;
 	}
-	if ( isset( $plugin_page ) && ( $plugin_page == $parent ) && isset( $_wp_menu_nopriv[$plugin_page] ) )
+	if ( isset( $plugin_page ) && ( $plugin_page == $parent ) && isset( $_wp_menu_nopriv[ $plugin_page ] ) ) {
 		return false;
+	}
-	if ( isset( $submenu[$parent] ) ) {
-		foreach ( $submenu[$parent] as $submenu_array ) {
+	if ( isset( $submenu[ $parent ] ) ) {
+		foreach ( $submenu[ $parent ] as $submenu_array ) {
 			if ( isset( $plugin_page ) && ( $submenu_array[2] == $plugin_page ) ) {
-				if ( current_user_can( $submenu_array[1] ))
+				if ( current_user_can( $submenu_array[1] ) ) {
 					return true;
-				else
+				} else {
 					return false;
+				}
 			} elseif ( $submenu_array[2] == $pagenow ) {
-				if ( current_user_can( $submenu_array[1] ))
+				if ( current_user_can( $submenu_array[1] ) ) {
 					return true;
-				else
+				} else {
 					return false;
+				}
 			}
 		}
 	}
 	foreach ( $menu as $menu_array ) {
-		if ( $menu_array[2] == $parent) {
+		if ( $menu_array[2] == $parent ) {
-			if ( current_user_can( $menu_array[1] ))
+			if ( current_user_can( $menu_array[1] ) ) {
 				return true;
-			else
+			} else {
 				return false;
+			}
 		}
 	}
 	return true;
 }
 * @return array
 */
 function option_update_filter( $options ) {
 	global $new_whitelist_options;
-	if ( is_array( $new_whitelist_options ) )
+	if ( is_array( $new_whitelist_options ) ) {
 		$options = add_option_whitelist( $new_whitelist_options, $options );
+	}
 	return $options;
 }
 /**
 * @param array        $new_options
 * @param string|array $options
 * @return array
 */
 function add_option_whitelist( $new_options, $options = '' ) {
-	if ( $options == '' )
+	if ( $options == '' ) {
 		global $whitelist_options;
-	else
+	} else {
 		$whitelist_options = $options;
+	}
 	foreach ( $new_options as $page => $keys ) {
 		foreach ( $keys as $key ) {
-			if ( !isset($whitelist_options[ $page ]) || !is_array($whitelist_options[ $page ]) ) {
+			if ( ! isset( $whitelist_options[ $page ] ) || ! is_array( $whitelist_options[ $page ] ) ) {
-				$whitelist_options[ $page ] = array();
+				$whitelist_options[ $page ]   = array();
 				$whitelist_options[ $page ][] = $key;
 			} else {
 				$pos = array_search( $key, $whitelist_options[ $page ] );
-				if ( $pos === false )
+				if ( $pos === false ) {
 					$whitelist_options[ $page ][] = $key;
+				}
 			}
 		}
 	}
 	return $whitelist_options;
 * @param array        $del_options
 * @param string|array $options
 * @return array
 */
 function remove_option_whitelist( $del_options, $options = '' ) {
-	if ( $options == '' )
+	if ( $options == '' ) {
 		global $whitelist_options;
-	else
+	} else {
 		$whitelist_options = $options;
+	}
 	foreach ( $del_options as $page => $keys ) {
 		foreach ( $keys as $key ) {
-			if ( isset($whitelist_options[ $page ]) && is_array($whitelist_options[ $page ]) ) {
+			if ( isset( $whitelist_options[ $page ] ) && is_array( $whitelist_options[ $page ] ) ) {
 				$pos = array_search( $key, $whitelist_options[ $page ] );
-				if ( $pos !== false )
+				if ( $pos !== false ) {
 					unset( $whitelist_options[ $page ][ $pos ] );
+				}
 			}
 		}
 	}
 	return $whitelist_options;
 *
 * @since 2.7.0
 *
 * @param string $option_group A settings group name. This should match the group name used in register_setting().
 */
-function settings_fields($option_group) {
+function settings_fields( $option_group ) {
-	echo "<input type='hidden' name='option_page' value='" . esc_attr($option_group) . "' />";
+	echo "<input type='hidden' name='option_page' value='" . esc_attr( $option_group ) . "' />";
 	echo '<input type="hidden" name="action" value="update" />';
-	wp_nonce_field("$option_group-options");
+	wp_nonce_field( "$option_group-options" );
 }
 /**
 * Clears the Plugins cache used by get_plugins() and by default, the Plugin Update cache.
 *
 * @since 3.7.0
 *
 * @param bool $clear_update_cache Whether to clear the Plugin updates cache
 */
 function wp_clean_plugins_cache( $clear_update_cache = true ) {
-	if ( $clear_update_cache )
+	if ( $clear_update_cache ) {
 		delete_site_transient( 'update_plugins' );
+	}
 	wp_cache_delete( 'plugins', 'plugins' );
 }
 /**
 * Load a given plugin attempt to generate errors.
 *
 * @since 3.0.0
 * @since 4.4.0 Function was moved into the `wp-admin/includes/plugin.php` file.
 *
-* @param string $plugin Plugin file to load.
+* @param string $plugin Path to the plugin file relative to the plugins directory.
 */
 function plugin_sandbox_scrape( $plugin ) {
+	if ( ! defined( 'WP_SANDBOX_SCRAPING' ) ) {
+		define( 'WP_SANDBOX_SCRAPING', true );
+	}
 	wp_register_plugin_realpath( WP_PLUGIN_DIR . '/' . $plugin );
 	include( WP_PLUGIN_DIR . '/' . $plugin );
 }
 /**
 		require_once( ABSPATH . 'wp-admin/includes/misc.php' );
 	}
 	WP_Privacy_Policy_Content::add( $plugin_name, $policy_text );
 }
+/**
+* Determines whether a plugin is technically active but was paused while
+* loading.
+*
+* For more information on this and similar theme functions, check out
+* the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
+* Conditional Tags} article in the Theme Developer Handbook.
+*
+* @since 5.2.0
+*
+* @param string $plugin Path to the plugin file relative to the plugins directory.
+* @return bool True, if in the list of paused plugins. False, not in the list.
+*/
+function is_plugin_paused( $plugin ) {
+	if ( ! isset( $GLOBALS['_paused_plugins'] ) ) {
+		return false;
+	}
+	if ( ! is_plugin_active( $plugin ) ) {
+		return false;
+	}
+	list( $plugin ) = explode( '/', $plugin );
+	return array_key_exists( $plugin, $GLOBALS['_paused_plugins'] );
+}
+/**
+* Gets the error that was recorded for a paused plugin.
+*
+* @since 5.2.0
+*
+* @param string $plugin Path to the plugin file relative to the plugins
+*                       directory.
+* @return array|false Array of error information as it was returned by
+*                     `error_get_last()`, or false if none was recorded.
+*/
+function wp_get_plugin_error( $plugin ) {
+	if ( ! isset( $GLOBALS['_paused_plugins'] ) ) {
+		return false;
+	}
+	list( $plugin ) = explode( '/', $plugin );
+	if ( ! array_key_exists( $plugin, $GLOBALS['_paused_plugins'] ) ) {
+		return false;
+	}
+	return $GLOBALS['_paused_plugins'][ $plugin ];
+}
+/**
+* Tries to resume a single plugin.
+*
+* If a redirect was provided, we first ensure the plugin does not throw fatal
+* errors anymore.
+*
+* The way it works is by setting the redirection to the error before trying to
+* include the plugin file. If the plugin fails, then the redirection will not
+* be overwritten with the success message and the plugin will not be resumed.
+*
+* @since 5.2.0
+*
+* @param string $plugin       Single plugin to resume.
+* @param string $redirect     Optional. URL to redirect to. Default empty string.
+* @return bool|WP_Error True on success, false if `$plugin` was not paused,
+*                       `WP_Error` on failure.
+*/
+function resume_plugin( $plugin, $redirect = '' ) {
+	/*
+	 * We'll override this later if the plugin could be resumed without
+	 * creating a fatal error.
+	 */
+	if ( ! empty( $redirect ) ) {
+		wp_redirect(
+			add_query_arg(
+				'_error_nonce',
+				wp_create_nonce( 'plugin-resume-error_' . $plugin ),
+				$redirect
+			)
+		);
+		// Load the plugin to test whether it throws a fatal error.
+		ob_start();
+		plugin_sandbox_scrape( $plugin );
+		ob_clean();
+	}
+	list( $extension ) = explode( '/', $plugin );
+	$result = wp_paused_plugins()->delete( $extension );
+	if ( ! $result ) {
+		return new WP_Error(
+			'could_not_resume_plugin',
+			__( 'Could not resume the plugin.' )
+		);
+	}
+	return true;
+}
+/**
+* Renders an admin notice in case some plugins have been paused due to errors.
+*
+* @since 5.2.0
+*/
+function paused_plugins_notice() {
+	if ( 'plugins.php' === $GLOBALS['pagenow'] ) {
+		return;
+	}
+	if ( ! current_user_can( 'resume_plugins' ) ) {
+		return;
+	}
+	if ( ! isset( $GLOBALS['_paused_plugins'] ) || empty( $GLOBALS['_paused_plugins'] ) ) {
+		return;
+	}
+	printf(
+		'<div class="notice notice-error"><p><strong>%s</strong><br>%s</p><p><a href="%s">%s</a></p></div>',
+		__( 'One or more plugins failed to load properly.' ),
+		__( 'You can find more details and make changes on the Plugins screen.' ),
+		esc_url( admin_url( 'plugins.php?plugin_status=paused' ) ),
+		__( 'Go to the Plugins screen' )
+	);
+}

changeset 9	177826044cd9
parent 7	cf61fcea0001
child 16	a86126ab1dd4