prepare("SELECT * FROM users WHERE id = ?"); $s->bind_param("s", $_SESSION["userid"]); $s->execute(); if (!(bool)$s->get_result()->fetch_assoc()) { // If not, then destroy session session_unset(); session_destroy(); echo "user id does not exist"; die("user id used in session does not exist"); } $LOGGED_IN = true; } else { // ATTENTION: idk will this work, but this can be theoretically unsafe or cause fault if (session_status()) { session_unset(); session_destroy(); } if (isset($_COOKIE["PHPSESSID"])) { unset($_COOKIE["PHPSESSID"]); setcookie("PHPSESSID", "", time() - 3600, "/"); } } ?>