isExist()){ header ('Location:install.php'); die(); } require(ROOT.'/f_config/DB.php'); require(ROOT.'/f_func/class._Session.php'); $SESSION = new _SESSION(); use utilphp\util as util; if($SESSION->isLoggedIn()){ header ('Location:i_entrance/entrance.php'); die(); } $access_token = $SESSION->get('access_token'); ?>