title: Force session ID from request
body: <p>Does anyone have any thoughts about why this wouldn't work?</p>
  
  <pre><code>    if(isset($_POST['PHPSESSID'])) {
  session_id($_POST['PHPSESSID']);
  session_start();
  var_dump($_SESSION);
  }
  </code></pre>
  
  <p>The var_dump($_SESSION); is always empty! It should be loaded with stuff! Are there any settings that prevent forcing session IDs? Auto start is not enabled.</p>