DI-enabled Silex Controller

bootstrap.php

<?php

namespace Acme\MyApp;

use Silex\Application;
use Silex\Provider\ServiceControllerServiceProvider;
use Silex\Provider\TwigServiceProvider;

$app = new Application();

$app->register(new TwigServiceProvider());
$app->register(new ServiceControllerServiceProvider());

$app['my_controller'] = function($app) {
    return new Controller\MyController($app['twig']);
};
$app->get('/my_route', 'my_controller:myAction');

MyController.php

<?php

namespace Acme\MyApp\Controller;

use Twig\Environment;

class MyController
{
    private $twig;
    
    public function __construct(Environment $twig)
    {
        $this->twig = $twig;
    }
    
    public function myAction(): string
    {
        // Insert controller logic here.
        
        return $this->twig
            ->render('my_template.html.twig', $parameters);
    }
}