// Bootstrap public/index.php


use Phalcon\Logger,
    Phalcon\Db\Adapter\Pdo\Mysql as Connection;

require_once '/../vendor/autoload.php';


error_reporting(E_ALL);

try {

     $di->setShared('facebook', function() use ($config) {
return new \Facebook([
'appId' => $config->facebook->appId,
'secret' => $config->facebook->secret,
]);
});



//Session Controller

use Phalcon\Tag as Tag;

class SessionController extends ControllerBase
{

 public function facebookAction()
    {
           FacebookSession::setDefaultApplication('xxx', 'xxx');


        $helper = new FacebookRedirectLoginHelper('index/index');
        $loginUrl = $helper->getLoginUrl();
        // Use the login url on a link or button to redirect to Facebook for authentication