无法在PHP SDK中获得Facebook好友

Question

I want to get facebook friends using php SDK. I cannot use Latest PHP SDK as it is using namespaces and my application doesn't support namespaces. I get following permissions from user

email,user_birthday,user_status,publish_stream,offline_access,user_friends

And when the code is executed, it shows the following Facebook OATH Dialogue

And you can see in the image that it doens't show user friends permission.

And when I want to get user's friends using PHP SDK using following code:

    require_once(APPLICATION_PATH_LIB . "/Facebook/facebook.php");
    $facebook = new Facebook(array('appId' => $appId, 'secret' => $appSecret));
    $token_url = "https://graph.facebook.com/oauth/access_token?" .
            "client_id=" . $appId .
            "&client_secret=" . $appSecret .
            "&grant_type=client_credentials";
    $app_token = file_get_contents($token_url);
    $app_token = explode("=", $app_token);

    $app_token = $app_token[1];

    $user = $facebook->getUser();



    if ($user) {

        $user_profile = $facebook->api('/me', array('access_token' => $app_token));
        //echo '<pre>';var_dump($user_profile);die;
        $friends = $facebook->api('/me/friends', array('access_token' => $app_token));

       echo '<pre>';print_r($friends);
    }

And it is giving me following error

OAuthException: An active access token must be used to query information about the current user.

Answer 1

They actually disabled this relatively recently---

You can now only get a list of facebook friends who are also using your app.

See this GraphAPI reference

(Second point under "Permissions")

There seems to be some disagreement about this, but, according to @drmarvelous, you can get the users' full list of friends if you submit your application for review and request that permission through the "Status & Review" section under your app. But, this process can take some time, and you may not even be granted the permission --