laravel 500 error how to display error exception

Laravel is a very popular PHP framework that is widely used in the development of web applications. The Laravel framework provides an easy-to-use way to create and manage web applications, making PHP development work more efficient, easier, and enjoyable. However, some errors and exceptions will occur with any framework, and the Laravel framework is no exception. This article will introduce how to display 500 error exception in Laravel framework.

1. Confirm whether error reporting is enabled

The Laravel framework has a feature that hides all error reporting information by default to protect the privacy and security of the application. . Therefore, if you want to view the details of 500 errors, you need to confirm whether error reporting is enabled in the Laravel framework. Open the configuration file config/app.php, find the debug configuration item in the file, and ensure that its value is true, as shown below:

 'debug' => env('APP_DEBUG', true),

If the value of this configuration item is false, you need to change it to true means turning on error reporting.

2. View the error report log

If the Laravel framework has enabled error reporting, but the error exception information is still not displayed on the page, you can view the error report log file of the Laravel framework storage/logs/laravel.log. This log file records all error information of the framework, including 500 error exceptions.

You can open the log file, view the latest log information, and locate related error report information. For example, if you encounter a "MethodNotAllowedHttpException" exception error, you can search for this keyword in the log file to find the details of the exception.

[2021-10-01 14:27:59] local.ERROR: MethodNotAllowedHttpException in file /var/www/html/laravel-app/vendor/laravel/framework/src/Illuminate/Routing/RouteCollection.php on line 255 {"exception":"[object] (Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException(code: 0):...

3. Display the error debugging page

If none of the above methods can solve the problem, you can display the error debugging page in the Laravel framework to obtain more error information. The specific operations are as follows:

Turn on laravel-debugbar (install debugbar: composer require barryvdh/laravel-debugbar --dev, and then add ServiceProvider in config/app.php):

'providers' => [

    IlluminateValidationValidationServiceProvider::class,

    IlluminateViewViewServiceProvider::class,

    //添加调试面板服务提供者类

    BarryvdhDebugbarServiceProvider::class,

],

Set APP_DEBUG=true in the .env file.

Add in the report method of app/Exceptions/Handler.php:

if ($this->shouldReport($exception)) {

    //开启调试面板

    app('debugbar')->enable();

}

Then access the application and you will see the detailed error information page. If you are using a local development environment, the error message page will contain all debugging information, including stack traces, request and response information, SQL query logs, etc.

4. Summary

In the process of developing web applications, 500 errors are a common exception, but diagnosing and fixing them in the Laravel framework is not difficulty. Through the methods provided in this article, you can try to locate and fix the problem by opening the error report, viewing the error log, and opening the error debugging page. Of course, once the problem is resolved, error reporting should also be turned off to ensure the security and privacy of the application.

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