Example of an Exception Controller that responds to exception events in our framework - http://www.symfonycentral.com

ErrorController.php

<?php
namespace Calendar\Controller;
 
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Exception\FlattenException;
 
class ErrorController
{
    public function exceptionAction(FlattenException $exception)
    {
        $msg = 'Something went wrong! ('.$exception->getMessage().')';
 
        return new Response($msg, $exception->getStatusCode());
    }
}