**一、項目根目錄創建訂單取消事件：** 創建成功后，在app目錄下會生成listener目錄以及OrderCancelTask.php ~~~ php think make:listener OrderCancelTask ~~~  **二、在app/event.php中定義訂單取消事件：** ~~~ <?php // 事件定義文件 return [ 'bind' => [ ], 'listen' => [ 'AppInit' => [], 'HttpRun' => [], 'HttpEnd' => [], 'LogLevel' => [], 'LogWrite' => [], 'swoole.task' => [ app\listener\OrderCancelTask::class, ], ], 'subscribe' => [ ], ]; ~~~ **三、完善 OrderCancelTask.php 的邏輯代碼** ~~~ <?php declare (strict_types = 1); namespace app\listener; class OrderCancelTask { /** * 事件監聽處理 * * @return mixed */ public function handle($event) { var_dump($event->data); echo iconv('utf-8', 'gbk//IGNORE','下單成功時間：').time().PHP_EOL; //模擬1分鐘后取消訂單 //`Swoole\Timer::after`在指定的時間后執行函數，是一個一次性定時器，執行完成后就會銷毀。 \Swoole\Timer::after(60000, function (int $timer_id, $param) { //TODO 判斷訂單是否已經支付，如果未支付，取消訂單 echo iconv('utf-8', 'gbk//IGNORE','訂單編號：') .$param["orderSn"].iconv('utf-8', 'gbk//IGNORE','超時未支付，已取消').PHP_EOL; echo time().PHP_EOL; }, $event->data); return; } } ~~~ **四、完善Order.php 的邏輯代碼** ~~~ <?php // +---------------------------------------------------------------------- // | najing [ 通用后臺管理系統 ] // +---------------------------------------------------------------------- // | Copyright (c) 2020 http://www.najingquan.com All rights reserved. // +---------------------------------------------------------------------- // | Author: 救火隊隊長 // +---------------------------------------------------------------------- namespace app\controller; use app\BaseController; /** * 訂單管理 * Class Order * @package app\controller */ class Order extends BaseController { public function save() { //TODO 調用驗證類驗證數據 //TODO 將訂單信息插入數據庫 //異步模擬 $manager = app('\think\swoole\Manager'); $data = [ 'orderSn' => '202005260001', 'time' => time() ]; $manager->getServer()->task($data); return "下單成功！".time(); } } ~~~ 訪問下單的方法，測試一下是否可以正常取消：