session_start(); header('Content-type: text/html; charset=UTF-8'); header( "Cache-Control: must-revalidate" ); $offset = 60 * 60 * 24 * 30; $ExpStr = "Expires: " . gmdate("D, d M Y H:i:s", time() + $offset) . " GMT"; header( $ExpStr ); if(!isset($_SESSION["user['login']"])) $_SESSION["user['login']"] = 'guest'; ?>