实例讲解如何在PHP的Yii框架中进行错误和异常处(3)

错误处理器根据响应设置的格式来显示错误， 如果yii\web\Response::format 响应格式为html, 会使用错误或异常视图来显示错误信息，如上一小节所述。 对于其他的响应格式，错误处理器会错误信息作为数组赋值给yii\web\Response::data属性，然后转换到对应的格式， 例如，如果响应格式为json，可以看到如下响应信息：

HTTP/1.1 404 Not Found Date: Sun, 02 Mar 2014 05:31:43 GMT Server: Apache/2.2.26 (Unix) DAV/2 PHP/5.4.20 mod_ssl/2.2.26 OpenSSL/0.9.8y Transfer-Encoding: chunked Content-Type: application/json; charset=UTF-8 { "name": "Not Found Exception", "message": "The requested resource was not found.", "code": 0, "status": 404 }

可在应用配置中响应response组件的beforeSend事件来自定义错误响应格式。

return [ // ... 'components' => [ 'response' => [ 'class' => 'yii\web\Response', 'on beforeSend' => function ($event) { $response = $event->sender; if ($response->data !== null) { $response->data = [ 'success' => $response->isSuccessful, 'data' => $response->data, ]; $response->statusCode = 200; } }, ], ], ];

上述代码会重新格式化错误响应，类似如下：

HTTP/1.1 200 OK Date: Sun, 02 Mar 2014 05:31:43 GMT Server: Apache/2.2.26 (Unix) DAV/2 PHP/5.4.20 mod_ssl/2.2.26 OpenSSL/0.9.8y Transfer-Encoding: chunked Content-Type: application/json; charset=UTF-8 { "success": false, "data": { "name": "Not Found Exception", "message": "The requested resource was not found.", "code": 0, "status": 404 } }

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