title: Storing the url a link refers to in php
body: <p>Is there any possibility to save the URL a specific domain/url refers to via PHP?</p>
  
  <p>I need to convert this Facebook URL.</p>
  
  <pre><code>https://www.facebook.com/app_scoped_user_id/10xxxxxxxxx/
  </code></pre>
  
  <p>into the public URL one sees when you click on the name in Facebook.</p>