<?php
header('Content-Type: application/xml; charset=UTF-8');
date_default_timezone_set('Asia/Singapore');
$host = $_SERVER['HTTP_HOST'] ?? ($_SERVER['SERVER_NAME'] ?? '');
$host = preg_replace('/[^a-zA-Z0-9\.-:]/', '', $host);
$scheme = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https' : 'http';
$base = $host ? $scheme . '://' . $host : '';
$today = date('Y-m-d');
$paths = ['/', '/services/', '/cases/', '/faq/', '/contact/', '/about/'];
echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<?php foreach ($paths as $path): ?>
  <url>
    <loc><?= htmlspecialchars($base . $path, ENT_QUOTES, 'UTF-8') ?></loc>
    <lastmod><?= $today ?></lastmod>
    <changefreq>daily</changefreq>
    <priority><?= $path === '/' ? '1.0' : '0.8' ?></priority>
  </url>
<?php endforeach; ?>
</urlset>
