Silex index.php file

index.php

require_once __DIR__ . '/vendor/autoload.php';
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

$app = new Silex\Application();

// $app['debug'] = true;

$app->register(new Silex\Provider\UrlGeneratorServiceProvider());

$app->register(new Silex\Provider\TwigServiceProvider(), array(
    'twig.path' => __DIR__.'/views',
));

// Home page
$app->get('/', function() use($app) {
    return $app['twig']->render('index.html');
})->bind('index');

// Other page
$app->get('/other', function() use($app) {
    return $app['twig']->render('other.html');
})->bind('other');

// 404 - Page not found
$app->error(function (\Exception $e, $code) use ($app) {
    switch ($code) {
        case 404:
          return $app['twig']->render('404.html', array('lang' => 'es', 'short_url' => '404'));
            $message = 'The requested page could not be found.';
            break;
        default:
            $message = 'We are sorry, but something went terribly wrong.';
    }

    return new Response($message);
});

$app->run();