Plugin_Upgrader

21class Plugin_Upgrader extends WP_Upgrader {22 23	/**24	 * Plugin upgrade result.25	 *26	 * @since 2.8.027	 * @var array|WP_Error $result28	 *29	 * @see WP_Upgrader::$result30	 */31	public $result;32 33	/**34	 * Whether a bulk upgrade/installation is being performed.35	 *36	 * @since 2.9.037	 * @var bool $bulk38	 */39	public $bulk = false;40 41	/**42	 * New plugin info.43	 *44	 * @since 5.5.045	 * @var array $new_plugin_data46	 *47	 * @see check_package()48	 */49	public $new_plugin_data = array();50 51	/**52	 * Initializes the upgrade strings.53	 *54	 * @since 2.8.055	 */56	public function upgrade_strings() {57		$this->strings['up_to_date'] = __( 'The plugin is at the latest version.' );58		$this->strings['no_package'] = __( 'Update package not available.' );59		/* translators: %s: Package URL. */60		$this->strings['downloading_package']  = sprintf( __( 'Downloading update from %s&#8230;' ), '<span class="code pre">%s</span>' );61		$this->strings['unpack_package']       = __( 'Unpacking the update&#8230;' );62		$this->strings['remove_old']           = __( 'Removing the old version of the plugin&#8230;' );63		$this->strings['remove_old_failed']    = __( 'Could not remove the old plugin.' );64		$this->strings['process_failed']       = __( 'Plugin update failed.' );65		$this->strings['process_success']      = __( 'Plugin updated successfully.' );66		$this->strings['process_bulk_success'] = __( 'Plugins updated successfully.' );67	}68 69	/**70	 * Initializes the installation strings.71	 *72	 * @since 2.8.073	 */74	public function install_strings() {75		$this->strings['no_package'] = __( 'Installation package not available.' );76		/* translators: %s: Package URL. */77		$this->strings['downloading_package'] = sprintf( __( 'Downloading installation package from %s&#8230;' ), '<span class="code pre">%s</span>' );78		$this->strings['unpack_package']      = __( 'Unpacking the package&#8230;' );79		$this->strings['installing_package']  = __( 'Installing the plugin&#8230;' );80		$this->strings['remove_old']          = __( 'Removing the current plugin&#8230;' );81		$this->strings['remove_old_failed']   = __( 'Could not remove the current plugin.' );82		$this->strings['no_files']            = __( 'The plugin contains no files.' );83		$this->strings['process_failed']      = __( 'Plugin installation failed.' );84		$this->strings['process_success']     = __( 'Plugin installed successfully.' );85		/* translators: 1: Plugin name, 2: Plugin version. */86		$this->strings['process_success_specific'] = __( 'Successfully installed the plugin <strong>%1$s %2$s</strong>.' );87 88		if ( ! empty( $this->skin->overwrite ) ) {89			if ( 'update-plugin' === $this->skin->overwrite ) {90				$this->strings['installing_package'] = __( 'Updating the plugin&#8230;' );91				$this->strings['process_failed']     = __( 'Plugin update failed.' );92				$this->strings['process_success']    = __( 'Plugin updated successfully.' );93			}94 95			if ( 'downgrade-plugin' === $this->skin->overwrite ) {96				$this->strings['installing_package'] = __( 'Downgrading the plugin&#8230;' );97				$this->strings['process_failed']     = __( 'Plugin downgrade failed.' );98				$this->strings['process_success']    = __( 'Plugin downgraded successfully.' );99			}100		}