ขอทราบวิธีการดึง email เวลา login with facebook หน่อยได้ไหมคับผมลองหลายวิธีแล้วยังทำไม่ได้เลยคับ

require_once "class/Facebook/facebook.php";

  // Create our Application instance (replace this with your appId and secret).
  $facebook = new Facebook(array(
          'appId'  => 'xxxxxxx',
          'secret' => 'xxxxxxx',
  ));

  // Get User ID
  $user = $facebook->getUser();

  if($user) {
    try {
      // Proceed knowing you have a logged in user who's authenticated.
      $user_profile = $facebook->api('/me');
    } 
    catch(FacebookApiException $e) {
      error_log($e);
      $user = null;
    }
  }
  $site_url = "http://www.xxxxxxxxxxx";

  // Login or logout url will be needed depending on current user state.
  if($user){
    $logoutUrl = $facebook->getLogoutUrl();
}else{
    $loginUrl = $facebook->getLoginUrl(array(
        'scope'         => 'email',
        'redirect_uri'  => 'http://toylection.com/login.php'
        ));
}

?>
	<?php if ($user): ?>
      <a href="logout.php">Logout</a>
    <?php else: ?>
      <div>
        <a href="<?php echo $loginUrl; ?>">Login with Facebook</a>
      </div>
    <?php endif ?>

    <?php
    	$fb_id =$user_profile['id'];
   $dealmember_fbid = $user_profile['id'];
   $fb_name =$user_profile['name'];
   $fb_first_name =$user_profile['first_name'];
   $fb_last_name =$user_profile['last_name'];
   $fb_link =$user_profile['link'];
   $fb_username =$user_profile['username'];
   $fb_gender =$user_profile['gender'];
   $contact_email = $user_profile["contact_email"];     //this was a separate permission, remember?
   $email = $user_profile["email"];     //this was a separate permission, remember?
   
   echo " fb_id = $fb_id <br>";
   echo " dealmember_fbid = $dealmember_fbid <br>";
   echo " fb_name = $fb_name <br>";
   echo " fb_first_name = $fb_first_name <br>";
   echo " fb_last_name = $fb_last_name <br>";
   echo " fb_link = $fb_link <br>";
   echo " fb_username = $fb_username <br>";
   echo " contact_email = $contact_email <br>";
   echo " email = $email <br>";
    ?>