title: Truly destroying a PHP Session?
body: <p>I have heard mixed responses on this topic, so what is a sure fire way to destroy a PHP session?  </p>
  
  <pre><code>session_start();
  if(isset($_SESSION['foo'])) {
     unset($_SESSION['foo'];
     ...
  }
  session_destroy();
  </code></pre>
  
  <p>In the most simple of cases, would this sufficient to truly terminate the session between the user and the server?</p>