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symfony 4/5 controller/action Cheatsheet

Get Request Params

https://symfony.com/doc/5.4/controller.html#the-request-and-response-object

  • $request->headers->all()
  • GET: $request->query->all()
  • POST: $request->request->all()
  • e.g. JSON payload: $request->getContent() + json_decode()
  • $request->server->all()

 

Get env/debug

  • $this->getParameter('kernel.environment')  // prod, dev

$this->getParameter('kernel.debug') // true, false

 

Error Handling / 404 / 500

https://symfony.com/doc/current/controller.html#managing-errors-and-404-pages
https://symfony.com/doc/5.4/controller/error_pages.html

  • // In a controller action
if (!$foo)) {
    throw $this->createNotFoundException('No foo going on!');
}

Custom error page:

  • Create "templates/bundles/TwigBundle/Exception/error.html.twig" 
    • {% extends 'base.html.twig' %}

{# Test with http://localhost:8040/_error/404 #}

{% block body %}
    <h1>{{ status_code }} - Sorry, something went wrong...</h1>
    <p>
        <a href="/">Back to homepage</a>.
    </p>

    <script>
        setTimeout(() => {
            window.location.href = '/';
        }, 2000);
    </script>

{% endblock %}

Redirect

  • return $this->redirect($fixedUrl, 301);

Redirect directly from a controller subroutine:

  • $redirectResponse = $this->redirect($fixedUrl, 301);
$redirectResponse->send();