-if (@setcookie("userid", "", time() - 3600, COOKIE_PATH) && @setcookie("u_hash", "", time() - 3600, COOKIE_PATH) && @setcookie("lifetime", "0", time() - 3600, COOKIE_PATH))
+if (set_session("userid", "", time() - 3600, COOKIE_PATH) && set_session("u_hash", "", time() - 3600, COOKIE_PATH) && set_session("lifetime", "", time() - 3600, COOKIE_PATH))