使用Facebook的PHP SDK来检索电子邮件

Question

到目前为止，我已设置检索基本的用户信息，没有任何扩展。我也试图获得用户的电子邮件，没有成功。这是我得到的：

$facebook = new Facebook(array(
      'appId' => APP_ID, 
      'secret' => APP_SECRET, 
      'cookie' => true, 

     )); 

$session = $facebook->getSession(); 

if (!empty($session)) { 
    try { 
    $params = array(
     'scope' => 'email', 
     'redirect_uri' => 'https://www.dormduels/splash_test' 
    ); 

    $loginUrl = $facebook->getLoginUrl($params); 
     $uid = $facebook->getUser(); 

     $access_token = $facebook->getAccessToken(); 

     echo $access_token; 
     $user = $facebook->api('me?fields=name,first_name,last_name,username,email&access_token='.$access_token); 
     echo "<pre>"; 
     print_r($user); 
     exit(); 

问题是。在Facebook图形浏览器中测试时，它显示的getAccessToken不显示扩展数据，如电子邮件，只有基本的。我如何请求启用更多权限的访问令牌？

Answer 1

您需要通过以下方式之一来这里问extended permissions，即 “电子邮件” 为：

1. PHP SDK

   使用SDK对象的getLoginUrl()方法，并指定在'范围'中需要扩展的权限，并将用户重定向到它的返回值，还需要在您的facebook app's admin page中添加域和站点URL。这里有一个例子：

   define('APP_ID', 'TODO FILL IT WITH YOURS'); 
   define('APP_SECRET', 'TODO FILL IT WITH YOURS'); 
   
   require_once 'facebook.php'; 
   
   function redirect_to_login($fb){ 
       $login_url = $fb->getLoginUrl(array(
        'scope' => 'email', 
       )); 
       header('Location: '.$login_url); 
       exit; 
   } 
   
   $fb = new Facebook(array(
       'appId' => APP_ID, 
       'secret' => APP_SECRET, 
       'cookie' => true, 
   )); 
   
   $uid = $fb->getUser(); 
   if (!$uid || !check_perms($fb, $uid, array('email'))) { // see check_perms below 
       // send users to login/auth page if they are not logged in, 
       // or not installed the app, 
       // or don't have all the perms we need 
       redirect_to_login($fb); 
   } 
   
   try { 
       $me = $fb->api('/me'); 
       var_dump($me); 
   } catch (Exception $e) { 
       redirect_to_login($fb); 
   } 
   

2. JS SDK

   使用FB.login()功能要求您需要的扩展权限，在第二个参数。

有关整个认证过程的详细信息，请参阅this page。

如果要检查当前用户拥有你想要的所有权限，可以使用FQL这样的：

function check_perms($facebook, $uid, $perms = array()) { 

    $perms_str = join(' = 1 and ', $perms).' = 1'; 
    $query = "select uid from permissions where uid = '".$uid."' and ".$perms_str; 

    try { 
     $row = $facebook->api(array(
      'method' => 'fql.query', 
      'query' => $query, 
     )); 
     return $row && $row[0]['uid'] == $uid; 
    } catch (Exception $e) { 
     return false; 
    } 
} 

注： 你php sdk版本可能已过时，那么的getSession（ ）方法都赞成的getUser（）/ getAccessToken（）

Answer 2

在我身边的被否决，我做这种方式：

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

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

// We may or may not have this data based on whether the user is logged in. 
// 
// If we have a $fb_user id here, it means we know the user is logged into 
// Facebook, but we don't know if the access token is valid. An access 
// token is invalid if the user logged out of Facebook. 
if ($fb_user) { 
    try { 
    // Proceed knowing you have a logged in user who's authenticated. 
    $fb_user_profile = $facebook->api('/me'); 
    } catch (FacebookApiException $e) { 
    error_log($e); 
    $fb_user = null; 
    } 
} 

// Login or logout url will be needed depending on current user state. 
if ($fb_user) { 
    $fb_loggedin = true; 
} else { 
    $fb_loggedin = false; 
    $fb_loginUrl = $facebook->getLoginUrl(array(
     'scope' => 'email,user_location', 
     'redirect_uri' => 'http://'.$_SERVER['HTTP_HOST'].'/debut_'.($lang == 'fr' ? 'fr' : 'eng').'.php' 
    )); 
} 

在getLoginUrl范围要看看，你可以看到开发人员网站上的所有不同的权限：

https://developers.facebook.com/docs/authentication/permissions/

好运

Answer 3

Try following: 
$facebook = new Facebook(array(
    'appId' => APP_ID, 
    'secret' => APP_SECRET, 
    'cookie' => true, 
)); 

public function login() { 
     $loginUrl= $facebook->getLoginUrl(array('scope' => 'email', 
        'redirect_uri' => 'your redirectUri', 
        'display' => 'popup' 
       )); 
     header("Location:$loginUrl"); 
    } 
public function fUserInfo() { 
     $access_token = $facebook->getAccessToken(); 
     //check permissions list 
     $permissions_list = $facebook->api('/me/permissions', 'GET', array('access_token' => $access_token)); 
     $permissions_needed = array('email'); 
     foreach ($permissions_needed as $perm) { 
      if (!isset($permissions_list['data'][0][$perm]) || $permissions_list['data'][0][$perm] != 1) { 
       login(); 
      } 
     } 
     $user = $facebook->getUser(); 
     if ($user) { 
      try { 
       $userInfo = $facebook->api("/$user"); 
      } catch (FacebookApiException $e) { 
       Config::getLogger()->debug($e->getMessage()); 
      } 
     } 
     print_r($userInfo); 
    }