title: how do i unset the session id so as to logout the user?
body: <p>How do I delete the <code>session id</code> while trying to destroy the session ?</p>
  
  <pre><code>session_start();
  $_SESSION['foo'] = 'bar';
  
  # clear the session variable
  session_unset();
  # delete the session
  session_destroy();
  
  # NOW WHAT ? HOW DO I UNSET THE SESSION-ID OR DELETE IT ?
  </code></pre>