README

Yii1 Enhanced Error Handler

This extension provides Enhanced Error Handler for Yii1 application.

For license information check the LICENSE-file.

Installation

The preferred way to install this extension is through composer.

Either run

php composer.phar require --prefer-dist yii1tech/error-handler

or add

"yii1tech/error-handler": "*"

to the "require" section of your composer.json.

Usage

This extension provides Enhanced Error Handler for Yii1 application. Its main feature is conversion of the PHP errors into exceptions, so they may be processed via try..catch blocks.

Note: in order for error to exception conversion to work, the error handler component should be added to the application "preload" section.

Application configuration example:

<?php

return [
    'preload' => [
        'errorHandler', // preload custom error handler, overriding the default one, allowing error to exception conversion
        // ...
    ],
    'components' => [
        'errorHandler' => [
            'class' => \yii1tech\error\handler\ErrorHandler::class,
        ],
        // ...
    ],
    // ...
];

Once configured \yii1tech\error\handler\ErrorHandler allows you to catch PHP errors as exceptions. For example:

<?php

try {
    // ...
    trigger_error('Some custom error message', E_USER_WARNING);
    // ...
} catch (ErrorException $exception) {
    // handle error
}

In addition, \yii1tech\error\handler\ErrorHandler provides support for error/exception rendering as JSON output, which is useful for modern XHR and API implementation. By default, the error will be rendered as JSON only in case the HTTP client passes header "Accept" with matching MIME type - "application/json". However, you may control this behavior using \yii1tech\error\handler\ErrorHandler::$shouldRenderErrorAsJsonCallback. For example:

<?php

return [
    'preload' => [
        'errorHandler', // preload custom error handler, overriding the default one, allowing error to exception conversion
        // ...
    ],
    'components' => [
        'errorHandler' => [
            'class' => \yii1tech\error\handler\ErrorHandler::class,
            'shouldRenderErrorAsJsonCallback' => function () {
                if (!empty($_SERVER['HTTP_ACCEPT']) && strcasecmp($_SERVER['HTTP_ACCEPT'], 'application/json') === 0) {
                    return true;
                }
                
                if (Yii::app()->request->isAjaxRequest) {
                    return true;
                }
                
                if (str_starts_with(Yii::app()->request->getPathInfo(), 'api/')) {
                    return true;
                }
                
                return false;
            },
        ],
        // ...
    ],
    // ...
];

You may reuse the error handler ability to render errors as JSON in your custom error action, which is specified via \CErrorHandler::$errorAction. For example:

<?php

class SiteController extends CController
{
    public function actionError(): void
    {
        /** @var \yii1tech\error\handler\ErrorHandler $errorHandler */
        $errorHandler = Yii::app()->getErrorHandler();
        if ($errorHandler->shouldRenderErrorAsJson()) {
            // render JSON error representation.
            $errorHandler->renderErrorAsJson();
            
            return;
        }
        
        // Render HTML error representation:
        if ($error = $errorHandler->error) {
            $this->render('error', $error);
        }
    }
}