Define HTTP Status Code Of Exception in Symfony 7

By default, if an application throws an exception, Symfony will turn that exception into an error with 500 HTTP status code, unless exception implements the HttpExceptionInterface or extends a class that implements that interface (e.g. HttpException).

This tutorial shows how to define the HTTP status code of the exception in Symfony 7 application.

Let's say we have a controller that throws InvalidArgumentException provided by Validator component.

src/Controller/TestController.php

<?php

namespace App\Controller;

use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Attribute\Route;
use Symfony\Component\Validator\Exception\InvalidArgumentException;

class TestController
{
    #[Route('/')]
    public function index(): Response
    {
        throw new InvalidArgumentException();
    }
}

We will get 500 Internal Server Error if we try to open associate URL of that controller.

Symfony allows defining HTTP status code of the exception by using framework.exceptions option.

config/packages/exceptions.yaml

framework:
    exceptions:
        Symfony\Component\Validator\Exception\InvalidArgumentException:
            status_code: 422

Now exception will be turned into an error with status code 422 Unprocessable Content.