SovBundle/EventListener/ExceptionListener.php

<?php

namespace Lc\SovBundle\EventListener;

use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\HttpKernel\Event\ExceptionEvent;
use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;

class ExceptionListener
{

    public function __construct(
        RequestStack $requestStack
    ) {
        $this->requestStack = $requestStack;
    }

    public function onKernelException(ExceptionEvent $event)
    {
        // You get the exception object from the received event
        $exception = $event->getThrowable();

//        On détecte une erreur interne (500), on remove les sessions qui servent de filtre dans l'admin
        if ($exception instanceof HttpExceptionInterface != true) {
            if (!headers_sent()) {
                foreach ($this->requestStack->getSession()->all() as $key => $s) {
                    if (str_contains($key, "_filter")) {
                        $this->requestStack->getSession()->remove($key);
                    }
                }
            }
        }
    }
}