gistfile1.php

<?
define('ROOTDIR', realpath( dirname(__FILE__) . '/../../' ) );

//Register app dirs
$loader = new \Phalcon\Loader();
$loader->registerDirs(
	array(
		ROOTDIR . 'app/models/',
		ROOTDIR . 'app/vendor/'
	)
)->register();

//setting up DI
$di = new \Phalcon\DI\FactoryDefault();

$di->setShared('session', function() {
    $session = new Phalcon\Session\Adapter\Files();
    $session->start();
    return $session;
});

$app = new Phalcon\Mvc\Micro();

$app->setDI($di);

$app->before(function() use ($app) {
    if($app->session->has("logged_in") !== true) {
			$app->response->redirect("/login");
			return false;
		}
});

$app->get('/', function () use ($app) {
   echo '/';
});

$app->get('/login', function () use ($app) {
   echo '/login'; 
});

$app->handle();