title: PHP DateTime class just like v5.3 for PHP 5.2
body: <p>I've found a few problems in applications I've been doing where methods like DateTime::diff would be of much assistance, but my host with PHP 5.2 does not support DateTime::diff or any other from 5.3.</p>
  
  <p>Can anyone point to a class implementation similar to PHP's DateTime class from v5.3, but working for PHP 5.2?</p>
  
  <p>Thanks in advance</p>