public function beforeAction($action) ???{ ???????return parent::beforeAction($action); ???} ???public function runAction($id, $params = []) ???{ ???????try { ???????????return parent::runAction($id, $params); ???????} catch (MyException $myException) { ???????????//此处返回业务错误 比如返回json字符串错误 ???????????$result = [ ???????????????‘status‘ => $myException->getCode(), ???????????????‘message‘ => $myException->getMessage(), ???????????????‘data‘ => null ???????????]; ???????????return json_encode($result, true); ???????} catch (\Exception $ex) { ???????????throw ?$ex; ???????} ???} ???public function afterAction($action, $result) ???{ ???????return parent::afterAction($action, $result); ???}异常类（只需要继承基础的异常类即可）
<?php/** * Created by PhpStorm. * User: Administrator * Date: 2018/12/8 0008 * Time: 14:38 */namespace app\librarys;class MyException extends \Exception{}可以在任意地方使用，不需要再写返回值，自动返回。
throw new MyException(‘错误信息‘);
PHP （Yii2） 自定义业务异常类（可支持返回任意自己想要的类型数据）
原文地址：https://www.cnblogs.com/lt-com/p/10087667.html