wp-admin/includes/class-language-pack-upgrader.php:167Upgrades several language packs at once.
$language_updatesobject[]optionalarray()$argsarrayoptionalarray()$clear_update_cachebooldefault: true
array|bool|WP_ErrorOne hook fires while Language_Pack_Upgrader::bulk_upgrade() runs, in this order:
Fires when the upgrader process is complete.
public function bulk_upgrade( $language_updates = array(), $args = array() ) { global $wp_filesystem; $defaults = array( 'clear_update_cache' => true, ); $parsed_args = wp_parse_args( $args, $defaults ); $this->init(); $this->upgrade_strings(); if ( ! $language_updates ) { $language_updates = wp_get_translation_updates(); } if ( empty( $language_updates ) ) { $this->skin->header(); $this->skin->set_result( true ); $this->skin->feedback( 'up_to_date' ); $this->skin->bulk_footer(); $this->skin->footer(); return true; } if ( 'upgrader_process_complete' === current_filter() ) { $this->skin->feedback( 'starting_upgrade' ); } // Remove any existing upgrade filters from the plugin/theme upgraders #WP29425 & #WP29230. remove_all_filters( 'upgrader_pre_install' ); remove_all_filters( 'upgrader_clear_destination' ); remove_all_filters( 'upgrader_post_install' ); remove_all_filters( 'upgrader_source_selection' ); add_filter( 'upgrader_source_selection', array( $this, 'check_package' ), 10, 2 ); $this->skin->header(); // Connect to the filesystem first. $res = $this->fs_connect( array( WP_CONTENT_DIR, WP_LANG_DIR ) ); if ( ! $res ) { $this->skin->footer(); return false; } $results = array(); $this->update_count = count( $language_updates ); $this->update_current = 0; /* * The filesystem's mkdir() is not recursive. Make sure WP_LANG_DIR exists, * as we then may need to create a /plugins or /themes directory inside of it. */ $remote_destination = $wp_filesystem->find_folder( WP_LANG_DIR ); if ( ! $wp_filesystem->exists( $remote_destination ) ) { if ( ! $wp_filesystem->mkdir( $remote_destination, FS_CHMOD_DIR ) ) { return new WP_Error( 'mkdir_failed_lang_dir', $this->strings['mkdir_failed'], $remote_destination ); } } $language_updates_results = array(); foreach ( $language_updates as $language_update ) { $this->skin->language_update = $language_update; $destination = WP_LANG_DIR; if ( 'plugin' === $language_update->type ) { $destination .= '/plugins'; } elseif ( 'theme' === $language_update->type ) { $destination .= '/themes'; } ++$this->update_current; $options = array( 'package' => $language_update->package, 'destination' => $destination, 'clear_destination' => true,Introduced in 3.7.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-language-pack-upgrader.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.