session_start(); $num = $_SESSION['num']; if($num == ""){ $num = $_REQUEST['n']; } function getRandStr($length = 6) { $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; $charactersLength = strlen($characters); $randomString = ''; for ($i = 0; $i < $length; $i++) { $randomString .= $characters[rand(0, $charactersLength - 1)]; } return $randomString; } $temp_state = getRandStr(10); $_SESSION["state"] = $temp_state; ?>