使用 Facebook 登录按钮获取用户的 Facebook 电子邮件 ID

Question

我为我的网站创建了一个 Facebook 登录按钮，并试图获取用户的 Facebook 电子邮件地址。 我得到的响应数组没有电子邮件地址。

这是我正在使用的代码：

require_once '../../config.php';
// added in v4.0.0
require_once 'autoload.php';
use Facebook\FacebookSession;
use Facebook\FacebookRedirectLoginHelper;
use Facebook\FacebookRequest;
use Facebook\FacebookResponse;
use Facebook\FacebookSDKException;
use Facebook\FacebookRequestException;
use Facebook\FacebookAuthorizationException;
use Facebook\GraphObject;
use Facebook\Entities\AccessToken;
use Facebook\HttpClients\FacebookCurlHttpClient;
use Facebook\HttpClients\FacebookHttpable;
// init app with app id and secret
FacebookSession::setDefaultApplication($appid,$appSecretKey );
// login helper with redirect_uri
$helper = new    FacebookRedirectLoginHelper(WEBSITE_FRONTEND_URL.'/facebook/fbconfig.php' );
try 
{
  $session = $helper->getSessionFromRedirect();

} catch( FacebookRequestException $ex ) {
  //echo " When Facebook returns an error";
} catch( Exception $ex ) {
 // echo "When validation fails or other local issues";
}
 // see if we have a session
 if(isset($session )) 
 {
   // graph api request for user data
   $request = new FacebookRequest( $session, 'GET', '/me' );
    print_r($request);
   $response = $request->execute();
  // get response
   $graphObject = $response->getGraphObject();
  print_r($graphObject);
   echo $graphObject->getProperty('email');
 }
 else 
 {
    $loginUrl = $helper->getLoginUrl(array('email'));
    header("Location: ".$loginUrl);
 }

我如何获得电子邮件地址？能够获得电子邮件地址。

Answer 1

如果您使用的是 Graph API 的 v2.4，则需要明确指定要从 API 返回的每个字段：

$request = new FacebookRequest( $session, 'GET', '/me?fields=id,name,email' );

在这里看看我的回答：

• Facebook 只返回用户的姓名和 ID

Answer 2

        FB.login(function (response) {
            if (response.session) {
                var url = '/me?fields=name,email';  // this is what you want
                FB.api(url, function (response) {
                    alert(response.name);
                    alert(response.email);
                });
            }
            else {
                alert("User did not login successfully");
            }
        }, { scope: 'email' }); /* perms changed to scope */

将此用作网址

var url = '/me?fields=name,email';