是否可以使用Facebook API+从我拥有的一个封闭群中获取Facebook提要、喜好和评论；PHP

我想构建一个web应用程序，使用FacebookAPI+PHP从我拥有的一个封闭组中获取提要、喜好和评论

我看到我可以使用这个Graph API界面获取信息，开始阅读facebook文档，我开始认为我实际上无法做到这一点：

但仍然有这样一个问题：

而且我就是找不到获取群提要的函数 所以也许我只是工作不正常，我错过了一些东西

虽然在Facebook API界面上运行时，它确实可以工作（）

在以前的帖子中，很多stackoverflowers推荐我使用GraphAPI+PHP，这是完全正确的

这是我现在的代码，可以开始工作了

 <?php

    session_start();

  require_once( 'Facebook/FacebookSession.php' );
  require_once( 'Facebook/FacebookRedirectLoginHelper.php' );
  require_once( 'Facebook/FacebookRequest.php' );
  require_once( 'Facebook/FacebookResponse.php' );
  require_once( 'Facebook/FacebookSDKException.php' );
  require_once( 'Facebook/FacebookRequestException.php' );
  require_once( 'Facebook/FacebookAuthorizationException.php' );
  require_once( 'Facebook/GraphObject.php' );
  require_once( 'Facebook/GraphUser.php' );
  require_once( 'Facebook/GraphSessionInfo.php' );

  require_once( 'Facebook/HttpClients/FacebookHttpable.php' );
  require_once( 'Facebook/HttpClients/FacebookCurl.php' );
  require_once( 'Facebook/HttpClients/FacebookCurlHttpClient.php' );
  require_once( 'Facebook/Entities/AccessToken.php' );
  require_once( 'Facebook/Entities/SignedRequest.php' );

  use Facebook\GraphUser;
    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;


  $app_id = '1408050536103050';
  $app_secret = 'a866372f873730e703cdf0cb4521bd99';
  $redirect_url = 'http://localhost/test/YellowSpider/src/';

    FacebookSession::setDefaultApplication( $app_id, $app_secret );

  //helper for redirect
  $helper = new FacebookRedirectLoginHelper($redirect_url); 

  $session = $helper->getSessionFromRedirect(); //Processes the redirect data from Facebook, if present. Returns a FacebookSession or null.

  if ( isset($session) ){
    // Create request object, execute and capture responce 
    $request = new FacebookRequest($session, 'GET', '/15013584710049696319/feed'); //Represents a request that will be made against the Graph API.

    //From the response - get graph object
    $response = $request->execute(); //Returns a Facebook\FacebookResponse from this request, from which a strongly-typed result can be retrieved. 
                                     //Throws an exception if the request fails. If the error is returned from Facebook, 
                                     //as opposed to a networking issue, a Facebook\FacebookRequestException is thrown.

    $graph = $response->getGraphObject(); //Returns the result as a GraphObject. If specified, a strongly-typed subclass of GraphObject is returned.
    var_dump($graph);


    //use graph object methods to get user details
    //$name = $graph->getname();

    //echo "Hi $name";

  } 
  else {
    echo '<a href="' . $helper->getLoginUrl() . '">Login with Facebook</a>'; 

  }


?>

---

缺少令牌和权限定义。 此网页有一个简单的示例，说明了它的外观：

object(Facebook\GraphObject)[4]
  protected 'backingData' => 
    array (size=0)
      empty