public function register()
{
$model = new Login_Model();
if ($model->email_exists()) {
echo '<h1>email already exists</h1>';
$this->view->render('login/register', 0);
exit;
}
$id = $this->model->sign_up();
if ($id > 0) {
Session::init();
Session::set('id', $id);
echo Session::get('id');
echo 'successful registration';
header("Location:http://localhost/socialiko/post");
} else {
echo 'error in registration form';
}
}