Symfony php Custom exception controller not working

Question

I'm trying to create a custom exception controller in php Symfony 4. Essentially what I want to do is to have a default route that gets called when no other routes match.

I'm trying to follow the suggestions here: https://symfony.com/doc/current/controller/error_pages.html#custom-exception-controller

I've created the twig.yaml file inside configs>>pacakges:

twig:
    exception_controller: App\Controller\ExceptionController::showException

I've also created the ExceptionController class:

<?php
namespace  App\Controller;


use Symfony\Component\HttpFoundation\Response;

class ExceptionController
{

    public function showException()
    {
        $response = new Response();
        $response->setContent("Some random text");
        $response->headers->set('Content-Type', 'text/plain');
        $response->headers->set('Access-Control-Allow-Origin', '*');
        $response->setStatusCode(200);
        return $response;
    }
}

When I visit a url that does not exist I'm expecting to see the text "Some random text" but instead I get the default symfony not found page:

Any ideas what I might be doing wrong?

I had another look at this - I was able to create a new Symfony 4 instance and override the exception controller without any issue. One thing I noticed in your question: you said you created a twig.yaml - this should exist already. Also, you said you created it under configs - this should be config. Can you clarify the path of your twig.yaml? — Darragh Enright
– Darragh Enright, Commented Sep 29, 2018 at 8:53

Darragh Enright · Accepted Answer · 2018-09-29 09:32:12Z

1

You mentioned that you created a twig.yaml under configs/packages.

Two things:

This should be config, not configs
twig.yaml should already exist, there is no need to create this file.

My suspicion is that if you created this file, you've created a file in the wrong place and Symfony is not picking up your configuration change. Instead, add your configuration change to the existing twig.yaml file under config/packages.

Once you add your custom exception_controller path to this existing (assumed default) twig.yaml it should look something like this:

twig:
    default_path: '%kernel.project_dir%/templates'
    debug: '%kernel.debug%'
    strict_variables: '%kernel.debug%'
    exception_controller: App\Controller\ExceptionController::showException

I tested this with a fresh install and it works as expected.

Hope this helps :)

~~Your method should be called showException and not endpoint as you defined in your twig.exception_controller configuration.~~

edited Sep 29, 2018 at 9:32

answered Sep 28, 2018 at 16:05

Darragh Enright

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3 Comments

pedrumj Over a year ago

I've actually tried that as well but it did not work. Will update the original post with "showException"

pedrumj Over a year ago

Thank you, this post led me to find the answer. The documentation on setting up the exception controller only applies to symfony projects created using symfony/website-skeleton and not symfony/skeleton. The latter which is used for just setting up the minimum project for api calls.

Darragh Enright Over a year ago

Interesting. Good to know! Glad you have it sorted :)

user10224754 · Accepted Answer · 2018-09-28 15:31:03Z

0

Did you try to use routing for routes ? Rooting

answered Sep 28, 2018 at 15:31

user10224754

1 Comment

pedrumj Over a year ago

I'm not exactly sure what you mean by routing for routes? If you are are referring to mapping end points to urls all my main endpoints are mapped.

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