How to modify Laravel's error output format-Laravel-php.cn

How to modify Laravel's error output format

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Release： 2023-04-21 10:30:56

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Laravel is a popular PHP framework that many developers choose to use to develop web applications. During the development process, it is inevitable that you will encounter some errors and exceptions. By default, Laravel will output error information to PHP's error log, which is not very convenient for developers. Therefore, in this article we will introduce how to modify Laravel's error output form.

Modify the configuration file

The error message output form of Laravel can be modified in the configuration file. Open the .env file in the project root directory and change the value in the APP_DEBUG line to true to enable debugging mode, and Laravel will also report an error. Information is output directly to the browser.

APP_DEBUG=true

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However, this method has security risks. Because all details of the application are exposed in debug mode, this may give attackers the opportunity to attack the application. Therefore, in a production environment, debug mode should be disabled and the value of APP_DEBUG should be changed to false.

APP_DEBUG=false

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However, after this modification, the error message still cannot be displayed on the browser side, and further settings are required.

Install Whoops package

Whoops is a PHP error handling library that can display error information in a more beautiful way. Laravel integrates Whoops by default, but its dependency packages need to be installed.

Use Composer to install in the project root directory:

composer require filp/whoops

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After the installation is completed, you need to use the render method of the App\Exceptions\Handler class Beautify the error message.

use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
use Illuminate\Http\Request;
use Symfony\Component\HttpFoundation\Response;
use Whoops\Exception\Inspector;
use Whoops\Handler\PrettyPageHandler;

class Handler extends ExceptionHandler
{
    public function render($request, Exception $exception)
    {
        $response = new Response();

        if (config('app.debug')) {
            $whoops = new \Whoops\Run;
            $whoops->pushHandler(new \Whoops\Handler\PrettyPageHandler);
            $response->setContent($whoops->handleException($exception));
        } else {
            $response->setContent($this->renderHttpException($exception));
        }

        $response->setStatusCode($this->isHttpException($exception) ? $exception->getStatusCode() : 500);

        $response->exception = $exception;

        return $response;
    }
}

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In the above code, if the application is in debug mode, PrettyPageHandler of the Whoops library is used for beautification processing, otherwise no processing is performed.

Customized error page

In addition to using the Whoops library, Laravel also provides a method that allows developers to customize the error page. Just create the relevant template files in the resources/views/errors directory.

For example, if a 404 error occurs in the application, Laravel will look for the template file in resources/views/errors/404.blade.php and use the default template file if it is not found. .

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>404 Not Found</title>
    </head>
    <body>
        <h1>404</h1>
        <p>Page not found.</p>
    </body>
</html>

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In this way, developers can customize the error page to better fit the style of the application.

Summary

During the development process, a complete error reporting mechanism can help developers locate and fix errors faster. This article introduces several methods to modify the error output form of Laravel: modify the configuration file, install the Whoops package and customize the error page. Through these methods, developers can find the error output form that suits them best and improve development efficiency and code quality.

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