[Symfony] Get the parameters of the current route

Published on 2018-12-11 • Modified on 2018-12-11

These two magic variables are available in controllers' actions. We can declare them as function parameters or we can retrieve them from the request's attributes ($request->attributes->get()). I use them regularly to generate breadcrumbs. Fun fact: if using $_route_params as a function parameter, PHP_CodeSniffer will raise an error:

54 | ERROR | [ ] Variable "_route_params" is not in valid camel caps format

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<?php

declare(strict_types=1);

namespace App\Controller\Snippet;

use Symfony\Component\HttpFoundation\Request;

/**
 * I am using a PHP trait to isolate each snippet in a file.
 * This code should be called from a Symfony controller extending AbstractController (as of Symfony 4.2)
 * or Symfony\Bundle\FrameworkBundle\Controller\Controller (Symfony <= 4.1).
 * Services are injected in the main controller constructor.
 */
trait Snippet9Trait
{
    public function snippet9(Request $request): void
    {
        $route = $request->attributes->get('_route');
        $params = $request->attributes->get('_route_params');

        // Or you can use TypeHint directly in your controller function
        // public function snippet9(string $_route, array $_route_params)

        echo $route.PHP_EOL;
        print_r($params); // That's it! 😁
    }
}

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