Facebook Graph API - Issues with friends that have installed the app - php

Question

I have an android client, that initiate log-in to facebook, receives access token and other details about the profile.
The android client passes the access_token and details to the Server (PHP).
Both have facebook sdk installed.
When I initiate a FacebookRequest from the PHP, for example '/me/' It's working.
BUT when I initiate a (friends who have installed the APP) FacebookRequest from the PHP
'/me/friends'. I get "null".
When I use the graph explorer provided by facebook the result is :
{
"data": [
]
}
Additional information for the helpers:
The app contains only two users at the moment, which are friends on facebook.
Those users are both administrators of the app.
Currently the app is not live\published.
We haven't "Start a Submission" in Stats and Reviews as suggested somewhere.
We asked for the permission 'user_friends'.
Since everything in stack overflow requires reputation,
This is how the permissions look like:
http://i.stack.imgur.com/kURwB.png
Thanks
EDIT:
OK I added two test users, Made them friends of each other, and /me/friends through graph explorer is working for them.
BUT why doesn't it work for non-test-users?

Answer 1

Okay,
So apparently Facebook had a problem providing new Access Tokens.
Don't know why, but it provided the same access token, for new Log-Ins.
Now that they fixed that here is a Handy function that I wrote in PHP that will let users
Parse Facebook responses, this might come in hand since there is NOTHING explained over the Docs, Google, StackOverFlow.
use Facebook\FacebookSession;
use Facebook\FacebookRequest;
function find_my_facebook_friends($access_token){
require_once 'facebook-php-sdk-v4-4.0-dev/autoload.php';
FacebookSession::setDefaultApplication('app_key','secret_key');
$session = new FacebookSession($access_token);
$request = new FacebookRequest(
$session,
'GET',
'/me/friends'
);
$response = $request->execute();
$graphObject = $response->getGraphObject()->asArray();
return $graphObject;
}
Usage:
include_once 'path/to/function.php';
//You wanna use it, just so the PHP file contains your app_key, secret_key Wont be exposed.
$access_token = isset($_POST['access_token']) ? $_POST['access_token'] : NULL;
$facebook_object = find_my_facebook_friends($access_token);
for($i = 0 ; $i < count($facebook_object['data']) ; $i++){
$id = get_object_vars($facebook_object['data'][$i]);
echo $id['id'];
echo $id['name'];
//You don't have to echo, you could handle those fields as you wanted.
}
This function refers to a Mobile Client passing his Log In User's access token to the server.
I hope this will save you lots of time!