Facebook用戶標識在用範圍登錄後爲空爲什麼？

Question

當我產生一個帶有作用域的登錄URL時，getUser（）返回0; getLoginUrl（）中沒有參數;它返回一個用戶ID。

$userID = $facebook->getUser(); 
    $params = array(); 
    $params['scope'] = 'email, user_about_me, user_events'; 
    $params['redirect_uri'] = $appurl; 


    $loginUrl = $facebook->getLoginUrl($params); // doesnt work 
    //$loginUrl = $facebook->getLoginUrl(); // works 
    $logoutUrl = $facebook->getLogoutUrl(); 
    //test user 
    if($userID){ 

Answer 1

嘗試......

$loginUrl = $facebook->getLoginUrl(
    array(
     'redirect_uri' => $appurl, 
     'scope' => 'email, user_about_me, user_events', 
    ) 
);