facebook-php-sdk：爲什麼$ name變量不會返回任何內容？

Question

require 'facebook.php'; 

    $app_id ="11111111111111111"; 
    $app_secret = "11111111111111111111111111"; 

    $facebook = new facebook(array(
     'appId' => $app_id, 
     'secret' => $app_secret, 
     'cookie' => true 
    )); 

    $signed_request = $facebook->getSignedRequest(); 
    $page_id = $signed_request["page"]["id"]; 
    $page_admin = $signed_request["page"]["admin"]; 
    $like_status = $signed_request["page"]["liked"]; 
    $country = $signed_request["user"]["country"]; 
    $locale = $signed_request["user"]["locale"]; 
    $name = $signed_request["user"]["name"]; 

Answer 1

根據該facebook docs，所述user屬性是

包含當前用戶的locale串，country串和age對象（包含年齡的min和max數範圍）的JSON對象。

請注意在這裏沒有提及name。