Xóa hàm 

$license_key = $_ENV['KEY_KICH_HOAT'];

$domain = $_SERVER['HTTP_HOST'];

$data = array(

    'licensekey' => $license_key,

    'domain' => $domain

);

$url = 'https://banquyen.dichvuright.com/dichvuright.php'

$ch = curl_init($url);

curl_setopt($ch, CURLOPT_POST, true);

curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);

if (curl_errno($ch)) {

    echo 'CURL Error: ' . curl_error($ch);

    exit;

} else {

    if ($response === 'Active') {

        $license_valid = true;

    } else {

        $license_valid = false;

    }

}

curl_close($ch);

if (!$license_valid) {

    require_once(__DIR__.'/../frontend/page/views/banquyen.php');

    exit;

}

trong config/function,php để không bị key bản quyền