$allowedDomain = "Mastersmm.online";
$currentDomain = $_SERVER['HTTP_HOST'];

if ($currentDomain === $allowedDomain) {
    echo "";
} else {
 echo '<p style="font-size: 16px; text-align: center;">This script is not authorized for use on this domain. To get access, Visit <a href="https://ahmaddigitalzone.com" style="color: #007BFF; font-weight: bold; text-decoration: none;" target="_blank"> Ahmaddigitalzone.com</a></p>';
exit();
}