title: How to send POST data without hidden element?
body: <p>I wonder how to send a POST parameter without showing the my secret data in html source.</p>
  
  <pre><code>&lt;input type="hidden" name="url" value="$secretdata"&gt;
  </code></pre>
  
  <p><code>$secrerdata</code> must be sent as <code>$_POST["url"]</code> but I want to send it on server side.</p>