如何从我的应用程序中获取Facebook用户ID?

我创建了一个Facebook应用程序，并通过下面的代码向用户发送请求.现在，当用户允许我的应用程序时，我需要他的ID和电子邮件地址进入我的画布URL.但是在下面的代码中，用户不要转到我的画布上画布URL.因此，请帮助我解决，当一个用户允许我的应用程序并且我获得该用户的用户ID时，如何转到我的画布URL?我的代码如下:

I created a facebook application and send request to a user through below code.Now when a user allow my application then i need his id and email address into my canvas url.But on that below code user don't go to my canvas URL.So,Please help me to solve ,how a user go to my canvas url when he allow my application and i get the user id of that user?My code is below:

require_once'facebook.php';
$ facebook = new Facebook(array(
'appId'=>'#######'，
'秘密'=>'###################'，
'cookie'=> true，));
$ req_perms =发布流，离线访问，用户状态，电子邮件，阅读流";

require_once 'facebook.php';
$facebook = new Facebook(array(
'appId' => '#######',
'secret' => '###################',
'cookie' => true, ));
$req_perms = "publish_stream,offline_access,user_status,email,read_stream";

$ session = $ facebook-> getSession();

$session = $facebook->getSession();

$ loginUrl = $ facebook-> getLoginUrl(array('canvas'=> 1，'fbconnect'=> 0，'req_perms'=> $ req_perms));
$ me = null;

$loginUrl = $facebook->getLoginUrl(array('canvas'=>1,'fbconnect' => 0,'req_perms'=>$req_perms));
$me = null;

如果(！$ session) {echo"top.location.href ='$ loginUrl';";退出;}

if (!$session) { echo "top.location.href= '$loginUrl';";exit;}

其他{

 try {
        $uid    =   $facebook->getUser();
        $me     =   $facebook->api('/me');
     } 
 catch (FacebookApiException $e) 
   { echo "<script type='text/javascript'>top.location.href= '$loginUrl';</script>"; exit;}
}

所以，请帮助我获取用户ID.

So,please help me to get the user id.

预先感谢

里亚德