title: facebook application get the username using php api
body: <p>i 've found using file_get_contents like</p>
  
  <p>json_decode(file_get_contents('http://graphdotfacebookdotcom/'.$uid));</p>
  
  <p>will make my application very slow to load, are there any methods to retrieve the username of the facebook user? </p>
  
  <p>thanks</p>