public static function getUserGroup($user_id)
 {
     $fb = new \Facebook\Facebook(['app_id' => FACEBOOK_API_KEY, 'app_secret' => FACEBOOK_API_SECRET, 'default_graph_version' => 'v2.5']);
     $request = new \Facebook\FacebookRequest(self::fbApp(), $_SESSION['facebook_access_token'], 'GET', '/' . $user_id . '/groups');
     $response = $fb->getClient()->sendRequest($request);
     $groups = $response->getDecodedBody();
     \Lib\Common::dd($groups);
 }
<?php

session_start();
/**
 * Created by PhpStorm.
 * User: hungnguyen
 * Date: 02/03/16
 * Time: 4:06 PM
 */
require_once __DIR__ . '/../vendor/autoload.php';
require_once __DIR__ . '/../GoogleSheet.php';
require_once __DIR__ . '/../Config.php';
$feedTitle = $_GET['feedTitle'];
use Google\Spreadsheet\DefaultServiceRequest;
use Google\Spreadsheet\ServiceRequestFactory;
use Lib\Common;
$serviceRequest = new DefaultServiceRequest(Common::getGoogleTokenFromKeyFile());
ServiceRequestFactory::setInstance($serviceRequest);
$spreadsheetService = new Google\Spreadsheet\SpreadsheetService();
$spreadsheetFeed = $spreadsheetService->getSpreadsheets();
$spreadsheet = $spreadsheetFeed->getByTitle($feedTitle);
$worksheetFeed = $spreadsheet->getWorksheets();
foreach ($worksheetFeed as $key => $value) {
    $sheet[] = $worksheetFeed[$key]->getTitle();
}
echo json_encode($sheet);