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- How do you implement a custom error handler in Yii?
How do you implement a custom error handler in Yii?
Implementing a custom error handler in Yii allows you to manage how errors and exceptions are displayed or logged in your application. Here’s a concise guide to set up a custom error handler in Yii.
Minimal Steps to Implement a Custom Error Handler in Yii
Create a Custom Error Handler Class:
- Create a new PHP file for your custom error handler (e.g.,
components/CustomErrorHandler.php
).
Example: CustomErrorHandler.php
Example
<?php
namespace app\components;
use Yii;
use yii\web\HttpException;
use yii\web\ErrorHandler;
class CustomErrorHandler extends ErrorHandler
{
protected function renderException($exception)
{
// Customize the response for different types of exceptions
if ($exception instanceof HttpException) {
Yii::$app->response->statusCode = $exception->statusCode;
return $this->renderAjaxError($exception); // Optionally, customize for AJAX
}
// Default error response
Yii::$app->response->statusCode = 500;
return $this->renderErrorPage($exception);
}
protected function renderErrorPage($exception)
{
// Render your custom error view
return $this->renderFile('@app/views/site/error.php', ['exception' => $exception]);
}
}
?>
Register the Custom Error Handler in Configuration:
- Open your
config/web.php
file and replace the default error handler with your custom one.
Example
<?php
'components' => [
'errorHandler' => [
'class' => 'app\components\CustomErrorHandler',
'errorAction' => 'site/error', // Optional: Redirect to a specific action
],
],
?>
Create an Error View:
- Create a view file (e.g.,
views/site/error.php
) to display error messages.
Example: error.php
Example
<?php
<?php
use yii\helpers\Html;
$this->title = 'Error';
?>
<div class="site-error">
<h1><?= Html::encode($this->title) ?></h1>
<div class="alert alert-danger">
<p><?= nl2br(Html::encode($exception->getMessage())) ?></p>
</div>
</div>
?>
Test Your Custom Error Handler:
- Trigger an error (e.g., by accessing a nonexistent route) to see if your custom error handling works.
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