ExampleController.php

<?php
/**
 * Example Class
 */
class MyRoutes
{
  /**
   * @var \Slim\App $slim
   */
  protected $slim;
  /**
   * @param \Slim\App $slim
   */
  public function __construct(\Slim\App $slim)
  {
     $this->slim = $slim;
  }
  
  protected function build()
  {
    // do the routes
    $this->slim->any('/', [$this, 'home']);
    $this->slim->post('/login[/]', [$this, 'login']);
    $this->slim->get('/article/{article_id: [a-9]([0-9]+)?}[/]', [$this, 'article']);
  }
  
  public function home($request, $response)
  {
    return $response;
  }
  
  public function login($request, $response)
  {
     return $response;
  }
  
  public function article($request, $response, $param = [])
  {
     $article_id = isset($param['article_id'])
      ? $param['article_id']
      : null;
     return $response;
  }

  // only tricky
  public function __invoke()
  {
    $this->build();
  }
}

RoutesExample.php

<?php
/* ------------------------------------------------------ *\
 |             APPLICATION COMPONENT ROUTES              |
\* ------------------------------------------------------ */
namespace {
    use PentagonalProject\ProjectSeventh\Application;
    use PentagonalProject\ProjectSeventh\Arguments;
    use Slim\App;
    if (!isset($this) || ! $this instanceof Arguments) {
        return;
    }
    /** @var Application $c */
    $c =& $this[CONTAINER_APPLICATION];
    if (!$c instanceof Application) {
        return;
    }
    /**
     * @var App $slim
     */
    $slim =& $c->getSlim();
    // start routes collections GROUP start with '(.*)?'
    $slim->group('', new MyRoutes($slim));
}