php__silex__book/src/demo/Controllers/DelegatingController.php

<?php

namespace demo\Controllers;

use Silex\Application;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\HttpKernelInterface;

/**
 * Class DelegatingController demonstrates delegation of response building.
 *
 * It shows redirection to a path, and forwarding to a subrequest using either
 * a path or a named route.
 *
 * @package demo\Controllers
 */
class DelegatingController {
  // Redirect via response header
  public function redirectPath(Application $app) {
    return $app->redirect('/', Response::HTTP_TEMPORARY_REDIRECT); // Default 302.
  }

  // Forward to another controller to avoid redirection, using a path.
  public function forwardPath(Application $app) {
    $subRequest = Request::create('/blogs', 'GET');
    return $app->handle($subRequest, HttpKernelInterface::SUB_REQUEST);
  }

  public function forwardName(Application $app) {
    /** @var \Symfony\Component\Routing\Generator\UrlGeneratorInterface $generator */
    $generator = $app['url_generator'];
    $subRequest = Request::create($generator->generate('blog_list', 'GET'));
    return $app->handle($subRequest, HttpKernelInterface::SUB_REQUEST);
  }

}