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Edit File : class-plugin-upgrader.php \| Size : 22.89 KB
<?php /** * Upgrade API: Plugin_Upgrader class * * @package WordPress * @subpackage Upgrader * @since 4.6.0 / /* * Core class used for upgrading/installing plugins. * * It is designed to upgrade/install plugins from a local zip, remote zip URL, * or uploaded zip file. * * @since 2.8.0 * @since 4.6.0 Moved to its own file from wp-admin/includes/class-wp-upgrader.php. * * @see WP_Upgrader / class Plugin_Upgrader extends WP_Upgrader { /* * Plugin upgrade result. * * @since 2.8.0 * @var array\|WP_Error $result * * @see WP_Upgrader::$result / public $result; /* * Whether a bulk upgrade/installation is being performed. * * @since 2.9.0 * @var bool $bulk / public $bulk = false; /* * New plugin info. * * @since 5.5.0 * @var array $new_plugin_data * * @see check_package() / public $new_plugin_data = array(); /* * Initializes the upgrade strings. * * @since 2.8.0 / public function upgrade_strings() { $this->strings['up_to_date'] = __( 'The plugin is at the latest version.' ); $this->strings['no_package'] = __( 'Update package not available.' ); / translators: %s: Package URL. / $this->strings['downloading_package'] = sprintf( __( 'Downloading update from %s…' ), '<span class="code pre">%s</span>' ); $this->strings['unpack_package'] = __( 'Unpacking the update…' ); $this->strings['remove_old'] = __( 'Removing the old version of the plugin…' ); $this->strings['remove_old_failed'] = __( 'Could not remove the old plugin.' ); $this->strings['process_failed'] = __( 'Plugin update failed.' ); $this->strings['process_success'] = __( 'Plugin updated successfully.' ); $this->strings['process_bulk_success'] = __( 'Plugins updated successfully.' ); } /* * Initializes the installation strings. * * @since 2.8.0 / public function install_strings() { $this->strings['no_package'] = __( 'Installation package not available.' ); / translators: %s: Package URL. / $this->strings['downloading_package'] = sprintf( __( 'Downloading installation package from %s…' ), '<span class="code pre">%s</span>' ); $this->strings['unpack_package'] = __( 'Unpacking the package…' ); $this->strings['installing_package'] = __( 'Installing the plugin…' ); $this->strings['remove_old'] = __( 'Removing the current plugin…' ); $this->strings['remove_old_failed'] = __( 'Could not remove the current plugin.' ); $this->strings['no_files'] = __( 'The plugin contains no files.' ); $this->strings['process_failed'] = __( 'Plugin installation failed.' ); $this->strings['process_success'] = __( 'Plugin installed successfully.' ); / translators: 1: Plugin name, 2: Plugin version. / $this->strings['process_success_specific'] = __( 'Successfully installed the plugin <strong>%1$s %2$s</strong>.' ); if ( ! empty( $this->skin->overwrite ) ) { if ( 'update-plugin' === $this->skin->overwrite ) { $this->strings['installing_package'] = __( 'Updating the plugin…' ); $this->strings['process_failed'] = __( 'Plugin update failed.' ); $this->strings['process_success'] = __( 'Plugin updated successfully.' ); } if ( 'downgrade-plugin' === $this->skin->overwrite ) { $this->strings['installing_package'] = __( 'Downgrading the plugin…' ); $this->strings['process_failed'] = __( 'Plugin downgrade failed.' ); $this->strings['process_success'] = __( 'Plugin downgraded successfully.' ); } } } /* * Install a plugin package. * * @since 2.8.0 * @since 3.7.0 The `$args` parameter was added, making clearing the plugin update cache optional. * * @param string $package The full local path or URI of the package. * @param array $args { * Optional. Other arguments for installing a plugin package. Default empty array. * * @type bool $clear_update_cache Whether to clear the plugin updates cache if successful. * Default true. * } * @return bool\|WP_Error True if the installation was successful, false or a WP_Error otherwise. / public function install( $package, $args = array() ) { $defaults = array( 'clear_update_cache' => true, 'overwrite_package' => false, // Do not overwrite files. ); $parsed_args = wp_parse_args( $args, $defaults ); $this->init(); $this->install_strings(); add_filter( 'upgrader_source_selection', array( $this, 'check_package' ) ); if ( $parsed_args['clear_update_cache'] ) { // Clear cache so wp_update_plugins() knows about the new plugin. add_action( 'upgrader_process_complete', 'wp_clean_plugins_cache', 9, 0 ); } $this->run( array( 'package' => $package, 'destination' => WP_PLUGIN_DIR, 'clear_destination' => $parsed_args['overwrite_package'], 'clear_working' => true, 'hook_extra' => array( 'type' => 'plugin', 'action' => 'install', ), ) ); remove_action( 'upgrader_process_complete', 'wp_clean_plugins_cache', 9 ); remove_filter( 'upgrader_source_selection', array( $this, 'check_package' ) ); if ( ! $this->result \|\| is_wp_error( $this->result ) ) { return $this->result; } // Force refresh of plugin update information. wp_clean_plugins_cache( $parsed_args['clear_update_cache'] ); if ( $parsed_args['overwrite_package'] ) { /* * Fires when the upgrader has successfully overwritten a currently installed * plugin or theme with an uploaded zip package. * * @since 5.5.0 * * @param string $package The package file. * @param array $data The new plugin or theme data. * @param string $package_type The package type ('plugin' or 'theme'). / do_action( 'upgrader_overwrote_package', $package, $this->new_plugin_data, 'plugin' ); } return true; } /* * Upgrades a plugin. * * @since 2.8.0 * @since 3.7.0 The `$args` parameter was added, making clearing the plugin update cache optional. * * @param string $plugin Path to the plugin file relative to the plugins directory. * @param array $args { * Optional. Other arguments for upgrading a plugin package. Default empty array. * * @type bool $clear_update_cache Whether to clear the plugin updates cache if successful. * Default true. * } * @return bool\|WP_Error True if the upgrade was successful, false or a WP_Error object otherwise. / public function upgrade( $plugin, $args = array() ) { $defaults = array( 'clear_update_cache' => true, ); $parsed_args = wp_parse_args( $args, $defaults ); $this->init(); $this->upgrade_strings(); $current = get_site_transient( 'update_plugins' ); if ( ! isset( $current->response[ $plugin ] ) ) { $this->skin->before(); $this->skin->set_result( false ); $this->skin->error( 'up_to_date' ); $this->skin->after(); return false; } // Get the URL to the zip file. $upgrade_data = $current->response[ $plugin ]; add_filter( 'upgrader_pre_install', array( $this, 'deactivate_plugin_before_upgrade' ), 10, 2 ); add_filter( 'upgrader_pre_install', array( $this, 'active_before' ), 10, 2 ); add_filter( 'upgrader_clear_destination', array( $this, 'delete_old_plugin' ), 10, 4 ); add_filter( 'upgrader_post_install', array( $this, 'active_after' ), 10, 2 ); / * There's a Trac ticket to move up the directory for zips which are made a bit differently, useful for non-.org plugins. * 'source_selection' => array( $this, 'source_selection' ), / if ( $parsed_args['clear_update_cache'] ) { // Clear cache so wp_update_plugins() knows about the new plugin. add_action( 'upgrader_process_complete', 'wp_clean_plugins_cache', 9, 0 ); } $this->run( array( 'package' => $upgrade_data->package, 'destination' => WP_PLUGIN_DIR, 'clear_destination' => true, 'clear_working' => true, 'hook_extra' => array( 'plugin' => $plugin, 'type' => 'plugin', 'action' => 'update', 'temp_backup' => array( 'slug' => dirname( $plugin ), 'src' => WP_PLUGIN_DIR, 'dir' => 'plugins', ), ), ) ); // Cleanup our hooks, in case something else does an upgrade on this connection. remove_action( 'upgrader_process_complete', 'wp_clean_plugins_cache', 9 ); remove_filter( 'upgrader_pre_install', array( $this, 'deactivate_plugin_before_upgrade' ) ); remove_filter( 'upgrader_pre_install', array( $this, 'active_before' ) ); remove_filter( 'upgrader_clear_destination', array( $this, 'delete_old_plugin' ) ); remove_filter( 'upgrader_post_install', array( $this, 'active_after' ) ); if ( ! $this->result \|\| is_wp_error( $this->result ) ) { return $this->result; } // Force refresh of plugin update information. wp_clean_plugins_cache( $parsed_args['clear_update_cache'] ); / * Ensure any future auto-update failures trigger a failure email by removing * the last failure notification from the list when plugins update successfully. / $past_failure_emails = get_option( 'auto_plugin_theme_update_emails', array() ); if ( isset( $past_failure_emails[ $plugin ] ) ) { unset( $past_failure_emails[ $plugin ] ); update_option( 'auto_plugin_theme_update_emails', $past_failure_emails ); } return true; } /* * Upgrades several plugins at once. * * @since 2.8.0 * @since 3.7.0 The `$args` parameter was added, making clearing the plugin update cache optional. * * @param string[] $plugins Array of paths to plugin files relative to the plugins directory. * @param array $args { * Optional. Other arguments for upgrading several plugins at once. * * @type bool $clear_update_cache Whether to clear the plugin updates cache if successful. Default true. * } * @return array\|false An array of results indexed by plugin file, or false if unable to connect to the filesystem. / public function bulk_upgrade( $plugins, $args = array() ) { $wp_version = wp_get_wp_version(); $defaults = array( 'clear_update_cache' => true, ); $parsed_args = wp_parse_args( $args, $defaults ); $this->init(); $this->bulk = true; $this->upgrade_strings(); $current = get_site_transient( 'update_plugins' ); add_filter( 'upgrader_clear_destination', array( $this, 'delete_old_plugin' ), 10, 4 ); $this->skin->header(); // Connect to the filesystem first. $connected = $this->fs_connect( array( WP_CONTENT_DIR, WP_PLUGIN_DIR ) ); if ( ! $connected ) { $this->skin->footer(); return false; } $this->skin->bulk_header(); / * Only start maintenance mode if: * - running Multisite and there are one or more plugins specified, OR * - a plugin with an update available is currently active. * @todo For multisite, maintenance mode should only kick in for individual sites if at all possible. / $maintenance = ( is_multisite() && ! empty( $plugins ) ); foreach ( $plugins as $plugin ) { $maintenance = $maintenance \|\| ( is_plugin_active( $plugin ) && isset( $current->response[ $plugin ] ) ); } if ( $maintenance ) { $this->maintenance_mode( true ); } $results = array(); $this->update_count = count( $plugins ); $this->update_current = 0; foreach ( $plugins as $plugin ) { ++$this->update_current; $this->skin->plugin_info = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin, false, true ); if ( ! isset( $current->response[ $plugin ] ) ) { $this->skin->set_result( 'up_to_date' ); $this->skin->before(); $this->skin->feedback( 'up_to_date' ); $this->skin->after(); $results[ $plugin ] = true; continue; } // Get the URL to the zip file. $upgrade_data = $current->response[ $plugin ]; $this->skin->plugin_active = is_plugin_active( $plugin ); if ( isset( $upgrade_data->requires ) && ! is_wp_version_compatible( $upgrade_data->requires ) ) { $result = new WP_Error( 'incompatible_wp_required_version', sprintf( / translators: 1: Current WordPress version, 2: WordPress version required by the new plugin version. / __( 'Your WordPress version is %1$s, however the new plugin version requires %2$s.' ), $wp_version, $upgrade_data->requires ) ); $this->skin->before( $result ); $this->skin->error( $result ); $this->skin->after(); } elseif ( isset( $upgrade_data->requires_php ) && ! is_php_version_compatible( $upgrade_data->requires_php ) ) { $result = new WP_Error( 'incompatible_php_required_version', sprintf( / translators: 1: Current PHP version, 2: PHP version required by the new plugin version. / __( 'The PHP version on your server is %1$s, however the new plugin version requires %2$s.' ), PHP_VERSION, $upgrade_data->requires_php ) ); $this->skin->before( $result ); $this->skin->error( $result ); $this->skin->after(); } else { add_filter( 'upgrader_source_selection', array( $this, 'check_package' ) ); $result = $this->run( array( 'package' => $upgrade_data->package, 'destination' => WP_PLUGIN_DIR, 'clear_destination' => true, 'clear_working' => true, 'is_multi' => true, 'hook_extra' => array( 'plugin' => $plugin, 'temp_backup' => array( 'slug' => dirname( $plugin ), 'src' => WP_PLUGIN_DIR, 'dir' => 'plugins', ), ), ) ); remove_filter( 'upgrader_source_selection', array( $this, 'check_package' ) ); } $results[ $plugin ] = $result; // Prevent credentials auth screen from displaying multiple times. if ( false === $result ) { break; } } // End foreach $plugins. $this->maintenance_mode( false ); // Force refresh of plugin update information. wp_clean_plugins_cache( $parsed_args['clear_update_cache'] ); /* This action is documented in wp-admin/includes/class-wp-upgrader.php / do_action( 'upgrader_process_complete', $this, array( 'action' => 'update', 'type' => 'plugin', 'bulk' => true, 'plugins' => $plugins, ) ); $this->skin->bulk_footer(); $this->skin->footer(); // Cleanup our hooks, in case something else does an upgrade on this connection. remove_filter( 'upgrader_clear_destination', array( $this, 'delete_old_plugin' ) ); / * Ensure any future auto-update failures trigger a failure email by removing * the last failure notification from the list when plugins update successfully. / $past_failure_emails = get_option( 'auto_plugin_theme_update_emails', array() ); foreach ( $results as $plugin => $result ) { // Maintain last failure notification when plugins failed to update manually. if ( ! $result \|\| is_wp_error( $result ) \|\| ! isset( $past_failure_emails[ $plugin ] ) ) { continue; } unset( $past_failure_emails[ $plugin ] ); } update_option( 'auto_plugin_theme_update_emails', $past_failure_emails ); return $results; } /* * Checks that the source package contains a valid plugin. * * Hooked to the {@see 'upgrader_source_selection'} filter by Plugin_Upgrader::install(). * * @since 3.3.0 * * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass. * * @param string $source The path to the downloaded package source. * @return string\|WP_Error The source as passed, or a WP_Error object on failure. / public function check_package( $source ) { global $wp_filesystem; $wp_version = wp_get_wp_version(); $this->new_plugin_data = array(); if ( is_wp_error( $source ) ) { return $source; } $working_directory = str_replace( $wp_filesystem->wp_content_dir(), trailingslashit( WP_CONTENT_DIR ), $source ); if ( ! is_dir( $working_directory ) ) { // Confidence check, if the above fails, let's not prevent installation. return $source; } // Check that the folder contains at least 1 valid plugin. $files = glob( $working_directory . '.php' ); if ( $files ) { foreach ( $files as $file ) { $new_plugin_data = get_plugin_data( $file, false, false ); if ( ! empty( $new_plugin_data['Name'] ) ) { $this->new_plugin_data = $new_plugin_data; break; } } } if ( empty( $this->new_plugin_data ) ) { return new WP_Error( 'incompatible_archive_no_plugins', $this->strings['incompatible_archive'], __( 'No valid plugins were found.' ) ); } $requires_php = isset( $new_plugin_data['RequiresPHP'] ) ? $new_plugin_data['RequiresPHP'] : null; $requires_wp = isset( $new_plugin_data['RequiresWP'] ) ? $new_plugin_data['RequiresWP'] : null; if ( ! is_php_version_compatible( $requires_php ) ) { $error = sprintf( /* translators: 1: Current PHP version, 2: Version required by the uploaded plugin. / __( 'The PHP version on your server is %1$s, however the uploaded plugin requires %2$s.' ), PHP_VERSION, $requires_php ); return new WP_Error( 'incompatible_php_required_version', $this->strings['incompatible_archive'], $error ); } if ( ! is_wp_version_compatible( $requires_wp ) ) { $error = sprintf( / translators: 1: Current WordPress version, 2: Version required by the uploaded plugin. / __( 'Your WordPress version is %1$s, however the uploaded plugin requires %2$s.' ), $wp_version, $requires_wp ); return new WP_Error( 'incompatible_wp_required_version', $this->strings['incompatible_archive'], $error ); } return $source; } /* * Retrieves the path to the file that contains the plugin info. * * This isn't used internally in the class, but is called by the skins. * * @since 2.8.0 * * @return string\|false The full path to the main plugin file, or false. / public function plugin_info() { if ( ! is_array( $this->result ) ) { return false; } if ( empty( $this->result['destination_name'] ) ) { return false; } // Ensure to pass with leading slash. $plugin = get_plugins( '/' . $this->result['destination_name'] ); if ( empty( $plugin ) ) { return false; } // Assume the requested plugin is the first in the list. $plugin_files = array_keys( $plugin ); return $this->result['destination_name'] . '/' . $plugin_files[0]; } /* * Deactivates a plugin before it is upgraded. * * Hooked to the {@see 'upgrader_pre_install'} filter by Plugin_Upgrader::upgrade(). * * @since 2.8.0 * @since 4.1.0 Added a return value. * * @param bool\|WP_Error $response The installation response before the installation has started. * @param array $plugin Plugin package arguments. * @return bool\|WP_Error The original `$response` parameter or WP_Error. / public function deactivate_plugin_before_upgrade( $response, $plugin ) { if ( is_wp_error( $response ) ) { // Bypass. return $response; } // When in cron (background updates) don't deactivate the plugin, as we require a browser to reactivate it. if ( wp_doing_cron() ) { return $response; } $plugin = isset( $plugin['plugin'] ) ? $plugin['plugin'] : ''; if ( empty( $plugin ) ) { return new WP_Error( 'bad_request', $this->strings['bad_request'] ); } if ( is_plugin_active( $plugin ) ) { // Deactivate the plugin silently, Prevent deactivation hooks from running. deactivate_plugins( $plugin, true ); } return $response; } /* * Turns on maintenance mode before attempting to background update an active plugin. * * Hooked to the {@see 'upgrader_pre_install'} filter by Plugin_Upgrader::upgrade(). * * @since 5.4.0 * * @param bool\|WP_Error $response The installation response before the installation has started. * @param array $plugin Plugin package arguments. * @return bool\|WP_Error The original `$response` parameter or WP_Error. / public function active_before( $response, $plugin ) { if ( is_wp_error( $response ) ) { return $response; } // Only enable maintenance mode when in cron (background update). if ( ! wp_doing_cron() ) { return $response; } $plugin = isset( $plugin['plugin'] ) ? $plugin['plugin'] : ''; // Only run if plugin is active. if ( ! is_plugin_active( $plugin ) ) { return $response; } // Change to maintenance mode. Bulk edit handles this separately. if ( ! $this->bulk ) { $this->maintenance_mode( true ); } return $response; } /* * Turns off maintenance mode after upgrading an active plugin. * * Hooked to the {@see 'upgrader_post_install'} filter by Plugin_Upgrader::upgrade(). * * @since 5.4.0 * * @param bool\|WP_Error $response The installation response after the installation has finished. * @param array $plugin Plugin package arguments. * @return bool\|WP_Error The original `$response` parameter or WP_Error. / public function active_after( $response, $plugin ) { if ( is_wp_error( $response ) ) { return $response; } // Only disable maintenance mode when in cron (background update). if ( ! wp_doing_cron() ) { return $response; } $plugin = isset( $plugin['plugin'] ) ? $plugin['plugin'] : ''; // Only run if plugin is active. if ( ! is_plugin_active( $plugin ) ) { return $response; } // Time to remove maintenance mode. Bulk edit handles this separately. if ( ! $this->bulk ) { $this->maintenance_mode( false ); } return $response; } /* * Deletes the old plugin during an upgrade. * * Hooked to the {@see 'upgrader_clear_destination'} filter by * Plugin_Upgrader::upgrade() and Plugin_Upgrader::bulk_upgrade(). * * @since 2.8.0 * * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass. * * @param bool\|WP_Error $removed Whether the destination was cleared. * True on success, WP_Error on failure. * @param string $local_destination The local package destination. * @param string $remote_destination The remote package destination. * @param array $plugin Extra arguments passed to hooked filters. * @return bool\|WP_Error / public function delete_old_plugin( $removed, $local_destination, $remote_destination, $plugin ) { global $wp_filesystem; if ( is_wp_error( $removed ) ) { return $removed; // Pass errors through. } $plugin = isset( $plugin['plugin'] ) ? $plugin['plugin'] : ''; if ( empty( $plugin ) ) { return new WP_Error( 'bad_request', $this->strings['bad_request'] ); } $plugins_dir = $wp_filesystem->wp_plugins_dir(); $this_plugin_dir = trailingslashit( dirname( $plugins_dir . $plugin ) ); if ( ! $wp_filesystem->exists( $this_plugin_dir ) ) { // If it's already vanished. return $removed; } / * If plugin is in its own directory, recursively delete the directory. * Base check on if plugin includes directory separator AND that it's not the root plugin folder. */ if ( strpos( $plugin, '/' ) && $this_plugin_dir !== $plugins_dir ) { $deleted = $wp_filesystem->delete( $this_plugin_dir, true ); } else { $deleted = $wp_filesystem->delete( $plugins_dir . $plugin ); } if ( ! $deleted ) { return new WP_Error( 'remove_old_failed', $this->strings['remove_old_failed'] ); } return true; } } Back

Edit File : class-plugin-upgrader.php | Size : 22.89 KB

<?php
/**
 * Upgrade API: Plugin_Upgrader class
 *
 * @package WordPress
 * @subpackage Upgrader
 * @since 4.6.0
 */

/**
 * Core class used for upgrading/installing plugins.
 *
 * It is designed to upgrade/install plugins from a local zip, remote zip URL,
 * or uploaded zip file.
 *
 * @since 2.8.0
 * @since 4.6.0 Moved to its own file from wp-admin/includes/class-wp-upgrader.php.
 *
 * @see WP_Upgrader
 */
class Plugin_Upgrader extends WP_Upgrader {

/**
	 * Plugin upgrade result.
	 *
	 * @since 2.8.0
	 * @var array|WP_Error $result
	 *
	 * @see WP_Upgrader::$result
	 */
	public $result;

/**
	 * Whether a bulk upgrade/installation is being performed.
	 *
	 * @since 2.9.0
	 * @var bool $bulk
	 */
	public $bulk = false;

/**
	 * New plugin info.
	 *
	 * @since 5.5.0
	 * @var array $new_plugin_data
	 *
	 * @see check_package()
	 */
	public $new_plugin_data = array();

/**
	 * Initializes the upgrade strings.
	 *
	 * @since 2.8.0
	 */
	public function upgrade_strings() {
		$this->strings['up_to_date'] = __( 'The plugin is at the latest version.' );
		$this->strings['no_package'] = __( 'Update package not available.' );
		/* translators: %s: Package URL. */
		$this->strings['downloading_package'] = sprintf( __( 'Downloading update from %s&#8230;' ), '%s' );
		$this->strings['unpack_package'] = __( 'Unpacking the update&#8230;' );
		$this->strings['remove_old'] = __( 'Removing the old version of the plugin&#8230;' );
		$this->strings['remove_old_failed'] = __( 'Could not remove the old plugin.' );
		$this->strings['process_failed'] = __( 'Plugin update failed.' );
		$this->strings['process_success'] = __( 'Plugin updated successfully.' );
		$this->strings['process_bulk_success'] = __( 'Plugins updated successfully.' );
	}

/**
	 * Initializes the installation strings.
	 *
	 * @since 2.8.0
	 */
	public function install_strings() {
		$this->strings['no_package'] = __( 'Installation package not available.' );
		/* translators: %s: Package URL. */
		$this->strings['downloading_package'] = sprintf( __( 'Downloading installation package from %s&#8230;' ), '%s' );
		$this->strings['unpack_package'] = __( 'Unpacking the package&#8230;' );
		$this->strings['installing_package'] = __( 'Installing the plugin&#8230;' );
		$this->strings['remove_old'] = __( 'Removing the current plugin&#8230;' );
		$this->strings['remove_old_failed'] = __( 'Could not remove the current plugin.' );
		$this->strings['no_files'] = __( 'The plugin contains no files.' );
		$this->strings['process_failed'] = __( 'Plugin installation failed.' );
		$this->strings['process_success'] = __( 'Plugin installed successfully.' );
		/* translators: 1: Plugin name, 2: Plugin version. */
		$this->strings['process_success_specific'] = __( 'Successfully installed the plugin %1$s %2$s.' );

if ( ! empty( $this->skin->overwrite ) ) {
			if ( 'update-plugin' === $this->skin->overwrite ) {
				$this->strings['installing_package'] = __( 'Updating the plugin&#8230;' );
				$this->strings['process_failed']     = __( 'Plugin update failed.' );
				$this->strings['process_success']    = __( 'Plugin updated successfully.' );
			}

if ( 'downgrade-plugin' === $this->skin->overwrite ) {
				$this->strings['installing_package'] = __( 'Downgrading the plugin&#8230;' );
				$this->strings['process_failed']     = __( 'Plugin downgrade failed.' );
				$this->strings['process_success']    = __( 'Plugin downgraded successfully.' );
			}
		}
	}

/**
	 * Install a plugin package.
	 *
	 * @since 2.8.0
	 * @since 3.7.0 The `$args` parameter was added, making clearing the plugin update cache optional.
	 *
	 * @param string $package The full local path or URI of the package.
	 * @param array  $args {
	 *     Optional. Other arguments for installing a plugin package. Default empty array.
	 *
	 *     @type bool $clear_update_cache Whether to clear the plugin updates cache if successful.
	 *                                    Default true.
	 * }
	 * @return bool|WP_Error True if the installation was successful, false or a WP_Error otherwise.
	 */
	public function install( $package, $args = array() ) {
		$defaults    = array(
			'clear_update_cache' => true,
			'overwrite_package'  => false, // Do not overwrite files.
		);
		$parsed_args = wp_parse_args( $args, $defaults );

$this->init();
		$this->install_strings();

add_filter( 'upgrader_source_selection', array( $this, 'check_package' ) );

if ( $parsed_args['clear_update_cache'] ) {
			// Clear cache so wp_update_plugins() knows about the new plugin.
			add_action( 'upgrader_process_complete', 'wp_clean_plugins_cache', 9, 0 );
		}

$this->run(
			array(
				'package'           => $package,
				'destination'       => WP_PLUGIN_DIR,
				'clear_destination' => $parsed_args['overwrite_package'],
				'clear_working'     => true,
				'hook_extra'        => array(
					'type'   => 'plugin',
					'action' => 'install',
				),
			)
		);

remove_action( 'upgrader_process_complete', 'wp_clean_plugins_cache', 9 );
		remove_filter( 'upgrader_source_selection', array( $this, 'check_package' ) );

if ( ! $this->result || is_wp_error( $this->result ) ) {
			return $this->result;
		}

// Force refresh of plugin update information.
		wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );

if ( $parsed_args['overwrite_package'] ) {
			/**
			 * Fires when the upgrader has successfully overwritten a currently installed
			 * plugin or theme with an uploaded zip package.
			 *
			 * @since 5.5.0
			 *
			 * @param string  $package      The package file.
			 * @param array   $data         The new plugin or theme data.
			 * @param string  $package_type The package type ('plugin' or 'theme').
			 */
			do_action( 'upgrader_overwrote_package', $package, $this->new_plugin_data, 'plugin' );
		}

return true;
	}

/**
	 * Upgrades a plugin.
	 *
	 * @since 2.8.0
	 * @since 3.7.0 The `$args` parameter was added, making clearing the plugin update cache optional.
	 *
	 * @param string $plugin Path to the plugin file relative to the plugins directory.
	 * @param array  $args {
	 *     Optional. Other arguments for upgrading a plugin package. Default empty array.
	 *
	 *     @type bool $clear_update_cache Whether to clear the plugin updates cache if successful.
	 *                                    Default true.
	 * }
	 * @return bool|WP_Error True if the upgrade was successful, false or a WP_Error object otherwise.
	 */
	public function upgrade( $plugin, $args = array() ) {
		$defaults    = array(
			'clear_update_cache' => true,
		);
		$parsed_args = wp_parse_args( $args, $defaults );

$this->init();
		$this->upgrade_strings();

$current = get_site_transient( 'update_plugins' );
		if ( ! isset( $current->response[ $plugin ] ) ) {
			$this->skin->before();
			$this->skin->set_result( false );
			$this->skin->error( 'up_to_date' );
			$this->skin->after();
			return false;
		}

// Get the URL to the zip file.
		$upgrade_data = $current->response[ $plugin ];

add_filter( 'upgrader_pre_install', array( $this, 'deactivate_plugin_before_upgrade' ), 10, 2 );
		add_filter( 'upgrader_pre_install', array( $this, 'active_before' ), 10, 2 );
		add_filter( 'upgrader_clear_destination', array( $this, 'delete_old_plugin' ), 10, 4 );
		add_filter( 'upgrader_post_install', array( $this, 'active_after' ), 10, 2 );
		/*
		 * There's a Trac ticket to move up the directory for zips which are made a bit differently, useful for non-.org plugins.
		 * 'source_selection' => array( $this, 'source_selection' ),
		 */
		if ( $parsed_args['clear_update_cache'] ) {
			// Clear cache so wp_update_plugins() knows about the new plugin.
			add_action( 'upgrader_process_complete', 'wp_clean_plugins_cache', 9, 0 );
		}

$this->run(
			array(
				'package'           => $upgrade_data->package,
				'destination'       => WP_PLUGIN_DIR,
				'clear_destination' => true,
				'clear_working'     => true,
				'hook_extra'        => array(
					'plugin'      => $plugin,
					'type'        => 'plugin',
					'action'      => 'update',
					'temp_backup' => array(
						'slug' => dirname( $plugin ),
						'src'  => WP_PLUGIN_DIR,
						'dir'  => 'plugins',
					),
				),
			)
		);

// Cleanup our hooks, in case something else does an upgrade on this connection.
		remove_action( 'upgrader_process_complete', 'wp_clean_plugins_cache', 9 );
		remove_filter( 'upgrader_pre_install', array( $this, 'deactivate_plugin_before_upgrade' ) );
		remove_filter( 'upgrader_pre_install', array( $this, 'active_before' ) );
		remove_filter( 'upgrader_clear_destination', array( $this, 'delete_old_plugin' ) );
		remove_filter( 'upgrader_post_install', array( $this, 'active_after' ) );

if ( ! $this->result || is_wp_error( $this->result ) ) {
			return $this->result;
		}

// Force refresh of plugin update information.
		wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );

/*
		 * Ensure any future auto-update failures trigger a failure email by removing
		 * the last failure notification from the list when plugins update successfully.
		 */
		$past_failure_emails = get_option( 'auto_plugin_theme_update_emails', array() );

if ( isset( $past_failure_emails[ $plugin ] ) ) {
			unset( $past_failure_emails[ $plugin ] );
			update_option( 'auto_plugin_theme_update_emails', $past_failure_emails );
		}

return true;
	}

/**
	 * Upgrades several plugins at once.
	 *
	 * @since 2.8.0
	 * @since 3.7.0 The `$args` parameter was added, making clearing the plugin update cache optional.
	 *
	 * @param string[] $plugins Array of paths to plugin files relative to the plugins directory.
	 * @param array    $args {
	 *     Optional. Other arguments for upgrading several plugins at once.
	 *
	 *     @type bool $clear_update_cache Whether to clear the plugin updates cache if successful. Default true.
	 * }
	 * @return array|false An array of results indexed by plugin file, or false if unable to connect to the filesystem.
	 */
	public function bulk_upgrade( $plugins, $args = array() ) {
		$wp_version = wp_get_wp_version();

$defaults    = array(
			'clear_update_cache' => true,
		);
		$parsed_args = wp_parse_args( $args, $defaults );

$this->init();
		$this->bulk = true;
		$this->upgrade_strings();

$current = get_site_transient( 'update_plugins' );

add_filter( 'upgrader_clear_destination', array( $this, 'delete_old_plugin' ), 10, 4 );

$this->skin->header();

// Connect to the filesystem first.
		$connected = $this->fs_connect( array( WP_CONTENT_DIR, WP_PLUGIN_DIR ) );
		if ( ! $connected ) {
			$this->skin->footer();
			return false;
		}

$this->skin->bulk_header();

/*
		 * Only start maintenance mode if:
		 * - running Multisite and there are one or more plugins specified, OR
		 * - a plugin with an update available is currently active.
		 * @todo For multisite, maintenance mode should only kick in for individual sites if at all possible.
		 */
		$maintenance = ( is_multisite() && ! empty( $plugins ) );
		foreach ( $plugins as $plugin ) {
			$maintenance = $maintenance || ( is_plugin_active( $plugin ) && isset( $current->response[ $plugin ] ) );
		}
		if ( $maintenance ) {
			$this->maintenance_mode( true );
		}

$results = array();

$this->update_count   = count( $plugins );
		$this->update_current = 0;
		foreach ( $plugins as $plugin ) {
			++$this->update_current;
			$this->skin->plugin_info = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin, false, true );

if ( ! isset( $current->response[ $plugin ] ) ) {
				$this->skin->set_result( 'up_to_date' );
				$this->skin->before();
				$this->skin->feedback( 'up_to_date' );
				$this->skin->after();
				$results[ $plugin ] = true;
				continue;
			}

// Get the URL to the zip file.
			$upgrade_data = $current->response[ $plugin ];

$this->skin->plugin_active = is_plugin_active( $plugin );

if ( isset( $upgrade_data->requires ) && ! is_wp_version_compatible( $upgrade_data->requires ) ) {
				$result = new WP_Error(
					'incompatible_wp_required_version',
					sprintf(
						/* translators: 1: Current WordPress version, 2: WordPress version required by the new plugin version. */
						__( 'Your WordPress version is %1$s, however the new plugin version requires %2$s.' ),
						$wp_version,
						$upgrade_data->requires
					)
				);

$this->skin->before( $result );
				$this->skin->error( $result );
				$this->skin->after();
			} elseif ( isset( $upgrade_data->requires_php ) && ! is_php_version_compatible( $upgrade_data->requires_php ) ) {
				$result = new WP_Error(
					'incompatible_php_required_version',
					sprintf(
						/* translators: 1: Current PHP version, 2: PHP version required by the new plugin version. */
						__( 'The PHP version on your server is %1$s, however the new plugin version requires %2$s.' ),
						PHP_VERSION,
						$upgrade_data->requires_php
					)
				);

$this->skin->before( $result );
				$this->skin->error( $result );
				$this->skin->after();
			} else {
				add_filter( 'upgrader_source_selection', array( $this, 'check_package' ) );
				$result = $this->run(
					array(
						'package'           => $upgrade_data->package,
						'destination'       => WP_PLUGIN_DIR,
						'clear_destination' => true,
						'clear_working'     => true,
						'is_multi'          => true,
						'hook_extra'        => array(
							'plugin'      => $plugin,
							'temp_backup' => array(
								'slug' => dirname( $plugin ),
								'src'  => WP_PLUGIN_DIR,
								'dir'  => 'plugins',
							),
						),
					)
				);
				remove_filter( 'upgrader_source_selection', array( $this, 'check_package' ) );
			}

$results[ $plugin ] = $result;

// Prevent credentials auth screen from displaying multiple times.
			if ( false === $result ) {
				break;
			}
		} // End foreach $plugins.

$this->maintenance_mode( false );

// Force refresh of plugin update information.
		wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );

/** This action is documented in wp-admin/includes/class-wp-upgrader.php */
		do_action(
			'upgrader_process_complete',
			$this,
			array(
				'action'  => 'update',
				'type'    => 'plugin',
				'bulk'    => true,
				'plugins' => $plugins,
			)
		);

$this->skin->bulk_footer();

$this->skin->footer();

// Cleanup our hooks, in case something else does an upgrade on this connection.
		remove_filter( 'upgrader_clear_destination', array( $this, 'delete_old_plugin' ) );

foreach ( $results as $plugin => $result ) {
			// Maintain last failure notification when plugins failed to update manually.
			if ( ! $result || is_wp_error( $result ) || ! isset( $past_failure_emails[ $plugin ] ) ) {
				continue;
			}

unset( $past_failure_emails[ $plugin ] );
		}

update_option( 'auto_plugin_theme_update_emails', $past_failure_emails );

return $results;
	}

/**
	 * Checks that the source package contains a valid plugin.
	 *
	 * Hooked to the {@see 'upgrader_source_selection'} filter by Plugin_Upgrader::install().
	 *
	 * @since 3.3.0
	 *
	 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
	 *
	 * @param string $source The path to the downloaded package source.
	 * @return string|WP_Error The source as passed, or a WP_Error object on failure.
	 */
	public function check_package( $source ) {
		global $wp_filesystem;

$wp_version            = wp_get_wp_version();
		$this->new_plugin_data = array();

if ( is_wp_error( $source ) ) {
			return $source;
		}

$working_directory = str_replace( $wp_filesystem->wp_content_dir(), trailingslashit( WP_CONTENT_DIR ), $source );
		if ( ! is_dir( $working_directory ) ) { // Confidence check, if the above fails, let's not prevent installation.
			return $source;
		}

// Check that the folder contains at least 1 valid plugin.
		$files = glob( $working_directory . '*.php' );
		if ( $files ) {
			foreach ( $files as $file ) {
				$new_plugin_data = get_plugin_data( $file, false, false );
				if ( ! empty( $new_plugin_data['Name'] ) ) {
					$this->new_plugin_data = $new_plugin_data;
					break;
				}
			}
		}

if ( empty( $this->new_plugin_data ) ) {
			return new WP_Error( 'incompatible_archive_no_plugins', $this->strings['incompatible_archive'], __( 'No valid plugins were found.' ) );
		}

$requires_php = isset( $new_plugin_data['RequiresPHP'] ) ? $new_plugin_data['RequiresPHP'] : null;
		$requires_wp  = isset( $new_plugin_data['RequiresWP'] ) ? $new_plugin_data['RequiresWP'] : null;

if ( ! is_php_version_compatible( $requires_php ) ) {
			$error = sprintf(
				/* translators: 1: Current PHP version, 2: Version required by the uploaded plugin. */
				__( 'The PHP version on your server is %1$s, however the uploaded plugin requires %2$s.' ),
				PHP_VERSION,
				$requires_php
			);

return new WP_Error( 'incompatible_php_required_version', $this->strings['incompatible_archive'], $error );
		}

if ( ! is_wp_version_compatible( $requires_wp ) ) {
			$error = sprintf(
				/* translators: 1: Current WordPress version, 2: Version required by the uploaded plugin. */
				__( 'Your WordPress version is %1$s, however the uploaded plugin requires %2$s.' ),
				$wp_version,
				$requires_wp
			);

return new WP_Error( 'incompatible_wp_required_version', $this->strings['incompatible_archive'], $error );
		}

return $source;
	}

/**
	 * Retrieves the path to the file that contains the plugin info.
	 *
	 * This isn't used internally in the class, but is called by the skins.
	 *
	 * @since 2.8.0
	 *
	 * @return string|false The full path to the main plugin file, or false.
	 */
	public function plugin_info() {
		if ( ! is_array( $this->result ) ) {
			return false;
		}
		if ( empty( $this->result['destination_name'] ) ) {
			return false;
		}

// Ensure to pass with leading slash.
		$plugin = get_plugins( '/' . $this->result['destination_name'] );
		if ( empty( $plugin ) ) {
			return false;
		}

// Assume the requested plugin is the first in the list.
		$plugin_files = array_keys( $plugin );

return $this->result['destination_name'] . '/' . $plugin_files[0];
	}

/**
	 * Deactivates a plugin before it is upgraded.
	 *
	 * Hooked to the {@see 'upgrader_pre_install'} filter by Plugin_Upgrader::upgrade().
	 *
	 * @since 2.8.0
	 * @since 4.1.0 Added a return value.
	 *
	 * @param bool|WP_Error $response The installation response before the installation has started.
	 * @param array         $plugin   Plugin package arguments.
	 * @return bool|WP_Error The original `$response` parameter or WP_Error.
	 */
	public function deactivate_plugin_before_upgrade( $response, $plugin ) {

if ( is_wp_error( $response ) ) { // Bypass.
			return $response;
		}

// When in cron (background updates) don't deactivate the plugin, as we require a browser to reactivate it.
		if ( wp_doing_cron() ) {
			return $response;
		}

$plugin = isset( $plugin['plugin'] ) ? $plugin['plugin'] : '';
		if ( empty( $plugin ) ) {
			return new WP_Error( 'bad_request', $this->strings['bad_request'] );
		}

if ( is_plugin_active( $plugin ) ) {
			// Deactivate the plugin silently, Prevent deactivation hooks from running.
			deactivate_plugins( $plugin, true );
		}

return $response;
	}

/**
	 * Turns on maintenance mode before attempting to background update an active plugin.
	 *
	 * Hooked to the {@see 'upgrader_pre_install'} filter by Plugin_Upgrader::upgrade().
	 *
	 * @since 5.4.0
	 *
	 * @param bool|WP_Error $response The installation response before the installation has started.
	 * @param array         $plugin   Plugin package arguments.
	 * @return bool|WP_Error The original `$response` parameter or WP_Error.
	 */
	public function active_before( $response, $plugin ) {
		if ( is_wp_error( $response ) ) {
			return $response;
		}

// Only enable maintenance mode when in cron (background update).
		if ( ! wp_doing_cron() ) {
			return $response;
		}

$plugin = isset( $plugin['plugin'] ) ? $plugin['plugin'] : '';

// Only run if plugin is active.
		if ( ! is_plugin_active( $plugin ) ) {
			return $response;
		}

// Change to maintenance mode. Bulk edit handles this separately.
		if ( ! $this->bulk ) {
			$this->maintenance_mode( true );
		}

return $response;
	}

/**
	 * Turns off maintenance mode after upgrading an active plugin.
	 *
	 * Hooked to the {@see 'upgrader_post_install'} filter by Plugin_Upgrader::upgrade().
	 *
	 * @since 5.4.0
	 *
	 * @param bool|WP_Error $response The installation response after the installation has finished.
	 * @param array         $plugin   Plugin package arguments.
	 * @return bool|WP_Error The original `$response` parameter or WP_Error.
	 */
	public function active_after( $response, $plugin ) {
		if ( is_wp_error( $response ) ) {
			return $response;
		}

// Only disable maintenance mode when in cron (background update).
		if ( ! wp_doing_cron() ) {
			return $response;
		}

$plugin = isset( $plugin['plugin'] ) ? $plugin['plugin'] : '';

// Only run if plugin is active.
		if ( ! is_plugin_active( $plugin ) ) {
			return $response;
		}

// Time to remove maintenance mode. Bulk edit handles this separately.
		if ( ! $this->bulk ) {
			$this->maintenance_mode( false );
		}

return $response;
	}

/**
	 * Deletes the old plugin during an upgrade.
	 *
	 * Hooked to the {@see 'upgrader_clear_destination'} filter by
	 * Plugin_Upgrader::upgrade() and Plugin_Upgrader::bulk_upgrade().
	 *
	 * @since 2.8.0
	 *
	 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
	 *
	 * @param bool|WP_Error $removed            Whether the destination was cleared.
	 *                                          True on success, WP_Error on failure.
	 * @param string        $local_destination  The local package destination.
	 * @param string        $remote_destination The remote package destination.
	 * @param array         $plugin             Extra arguments passed to hooked filters.
	 * @return bool|WP_Error
	 */
	public function delete_old_plugin( $removed, $local_destination, $remote_destination, $plugin ) {
		global $wp_filesystem;

if ( is_wp_error( $removed ) ) {
			return $removed; // Pass errors through.
		}

$plugin = isset( $plugin['plugin'] ) ? $plugin['plugin'] : '';
		if ( empty( $plugin ) ) {
			return new WP_Error( 'bad_request', $this->strings['bad_request'] );
		}

$plugins_dir     = $wp_filesystem->wp_plugins_dir();
		$this_plugin_dir = trailingslashit( dirname( $plugins_dir . $plugin ) );

if ( ! $wp_filesystem->exists( $this_plugin_dir ) ) { // If it's already vanished.
			return $removed;
		}

/*
		 * If plugin is in its own directory, recursively delete the directory.
		 * Base check on if plugin includes directory separator AND that it's not the root plugin folder.
		 */
		if ( strpos( $plugin, '/' ) && $this_plugin_dir !== $plugins_dir ) {
			$deleted = $wp_filesystem->delete( $this_plugin_dir, true );
		} else {
			$deleted = $wp_filesystem->delete( $plugins_dir . $plugin );
		}

if ( ! $deleted ) {
			return new WP_Error( 'remove_old_failed', $this->strings['remove_old_failed'] );
		}

return true;
	}
}

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