<?php /** * Created by PhpStorm. * User: turgutsaricam * Date: 01/04/2020 * Time: 22:05 * * @since 1.11.0 */ namespace WPCCrawler\Objects\Events\Interfaces; use Exception; interface Event { /** * Attach an observer to this event * * @param Observer|null $observer * @since 1.11.0 */ public function attach(?Observer $observer): void; /** * Detach a previously attached observer from this event * * @param Observer|null $observer * @since 1.11.0 */ public function detach(?Observer $observer): void; /** * Notify all attached observers * * @since 1.11.0 * @throws Exception */ public function notify(): void; }