title: How to get username from Facebook ID
body: <p>On the Internet there are a few topics about this problem, but I have not found any complex solution. Therefore, I would like to ask you for help.</p>
  
  <p>I need to change facebook id to username.</p>
  
  <p>When you type web site like this: </p>
  
  <p><code>http://facebook.com/profile.php?id=4</code> (num 4 is FB id), it will give you <code>http://www.facebook.com/zuck</code>, which is Mark Zuckerberg's profile.</p>
  
  <p>On this principle I need to find out who a id is. </p>
  
  <p>I have typed id <code>4</code> a got it is <code>zuck</code>.</p>
  
  <p>But I need it for more ids, so it would take a lot of time do it manually. Please help me, how I can do it. </p>