title: How to track DHL in our site from DHL site , by PHP
body: <p>I went to <a href="http://www.dhl.com.vn/publish/vn/en/eshipping/track.high.html" rel="nofollow noreferrer">DHL online shipment tracking</a> 
  and saw the form submit.  </p>
  
  <p>I want to include it on my site.
  How can I do it with php?</p>