<?php
$scheme = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https' : 'http';
$rawHost = $_SERVER['HTTP_HOST'] ?? ($_SERVER['SERVER_NAME'] ?? '');
$currentHost = preg_replace('/[^A-Za-z0-9\.\-:]/', '', $rawHost);
$baseUrl = $scheme . '://' . $currentHost;
$today = date('Y-m-d');
$paths = ['/', '/video/', '/topics/', '/authors/', '/about/', '/faq/', '/contact/', '/articles/91-video-observe/', '/articles/91-navigation-guide/', '/articles/91-life-video-weekly/', '/articles/91-browser-safety/'];
header('Content-Type: application/xml; charset=UTF-8');
echo '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<?php foreach ($paths as $path): ?>
  <url>
    <loc><?= htmlspecialchars($baseUrl . $path, ENT_XML1, 'UTF-8') ?></loc>
    <lastmod><?= htmlspecialchars($today, ENT_XML1, 'UTF-8') ?></lastmod>
    <changefreq><?= $path === '/' ? 'daily' : 'weekly' ?></changefreq>
    <priority><?= $path === '/' ? '1.0' : '0.8' ?></priority>
  </url>
<?php endforeach; ?>
</urlset>
