title: Bind method on Silex
body: <p>I couldn't find it anywhere. So I ask: On silex, why do we use bind() for? For example, on this routing of static pages:</p>
  
  <pre><code>$pages = array(
      '/'      =&gt; 'index',
      '/blog'  =&gt; 'blog',
      '/about' =&gt; 'about',
  );
  
  foreach($pages as $route =&gt; $view) {
      $api-&gt;get($route, function(Silex\Application $app) use($view) {
          return $app['twig']-&gt;render($view.'.html');
      })-&gt;bind($view);
  }
  </code></pre>