ดูโค้ดตัวนี้หน่อยนะครับ อยากได้แบบว่าถ้าเรา log out ไปแล้วไม่โชว์ข้อมูลใด ๆ ครับ

<?php
	session_start;
	include("connect.php");
	require '../scripts/src/facebook.php';

		$facebook = new Facebook(array(
		  'appId'  => '338212302933297',
		  'secret' => 'ebbe8ca92a23de8586976efb51a2f71c',
		));
		
		// See if there is a user from a cookie
		$user = $facebook->getUser();
		
		if ($user) {
		  try {
			// Proceed knowing you have a logged in user who's authenticated.
			$user_profile = $facebook->api('/me');
		  } catch (FacebookApiException $e) {
			echo '<pre>'.htmlspecialchars(print_r($e, true)).'</pre>';
			$user = null;
		  }
		}
		if ($user) {
			   $logoutUrl = $facebook->getLogoutUrl();
			} else {
			   $loginUrl = $facebook->getLoginUrl( array('scope' => 'email,read_stream'));
			}
?>