title: CSRF Token from the controller
body: <p>I have a controller getting a form posted.</p>
  
  <pre><code>public function myPostAction(Request $request)
  {
      $form = $this-&gt;createForm('my_form', $my_object);
      $form-&gt;handleRequest($request);
  #...
  </code></pre>
  
  <p>I can see my CSRF token posted as parameter</p>
  
  <blockquote>
    <p>my_form[_token] => lH38HTm5P0Cv3TOc4-9xi2COx-cZ670mpJ_36gR8ccI</p>
  </blockquote>
  
  <p>I simply need to read it</p>
  
  <pre><code>$form-&gt;get('_token')
  </code></pre>
  
  <p>This tells me</p>
  
  <blockquote>
    <p>Child "_token" does not exist.</p>
  </blockquote>
  
  <p>How can I get this token ?</p>