header('Expires: Sat, 01 Jan 2000 00:00:00 GMT');
header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
header('Cache-Control: post-check=0, pre-check=0',false);
header('Pragma: no-cache');
session_cache_limiter('public, no-store');session_set_cookie_params(0);
if (!session_id()) session_start();
setcookie('PHPSESSID', session_id());