<?php require_once 'facebook-client/facebook.php'; require_once 'facebook-client/facebookapi_php5_restlib.php'; $appapikey = '{YOUR API KEY HERE}'; $appsecret = '{YOUR APPLICATION SECRET KEY HERE}'; // do this after validation $userid = $_REQUEST['fb_sig_user']; $sKey = $_REQUEST['fb_sig_session_key']; if ($_REQUEST['action'] == "getName") { try { $fbClient = new FacebookRestClient($appapikey, $appsecret, $sKey); } catch (FacebookRestClientException $ex) { // Handle Exception } $userInfo = $fbClient->fql_query("SELECT name FROM user WHERE uid={$userid}"); $userName = $userInfo[0]['name']; // $userName now contains user's name. }