title: Tag friends on a feed post with php facebook sdk
body: <p>I'm 4 hours tring to send a post on a page on facebook with </p>
  
  <pre><code>$attachment = array(
          'message' =&gt; "@[".$id.":1:".$name.'] dsf sadfewqr',
                      'name' =&gt; "test test etst etst test test",
                      'link' =&gt; "http://www.tiscali.it",
                      'description' =&gt; "test",
          'picture'=&gt; "http://www.example.com/img.jpg",
          'message_tags' =&gt; array(
              'data' =&gt; array(
                  'id' =&gt; $id,
                  'name' =&gt; $partecipant['name_screen'],
                  'offset' =&gt; 0,
                  "type" =&gt; "user",
                  'length' =&gt; strlen($name)
              )
          ),
          'access_token' =&gt; '--fanpageaccesstoken--'
      );
  
      $facebook-&gt;api('/'.$idfanpage.'/feed', 'POST', $attachment);
  </code></pre>
  
  <p>Every time i get only message without tag. What i'm doing wrong?</p>
  
  <p>Thanks everyone!</p>