php__symfony__book/src/Controller/BlogController.php

<?php

namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;

class BlogController extends Controller {
  const POSTS = [
    1 => [
      'id' => '1',
      'title' => 'Title 1',
      'body' => 'Body 1',
      ],
    2 => [
      'id' => '2',
      'title' => 'Title 2',
      'body' => 'Body 2',
    ],
    3 => [
      'id' => '3',
      'title' => 'Title 3',
      'body' => 'Body 3',
    ],
  ];

  /**
   * @param $page
   *
   * @return Response
   *
   * @Route(
   *   name ="blog_list",
   *   path ="/blog/{page}",
   *   requirements={"page" = "\d+"}
   * )
   */
  public function list($page = 1) {
    return $this->render('blog/index.html.twig', [
      'blog_entries' => static::POSTS,
      'pager' => "Page $page of the blog list.",
    ]);
  }

  /**
   * @param $slug
   *
   * @return \Symfony\Component\HttpFoundation\Response
   *
   * @Route(
   *   name = "blog_show",
   *   path = "/blog/{slug}"
   * )
   */
  public function show($slug) {
    $path = $this->generateUrl('blog_list', [
      // Placeholder: fit in the path.
      'page' => 2,
      // Non-placeholder: fit in the query
      'foo' => 'bar',
    ], UrlGeneratorInterface::ABSOLUTE_PATH);
    return new Response("Show $slug. Back to page 2: $path");
  }

}