<?php
header('Content-Type: application/xml; charset=UTF-8');
date_default_timezone_set('Asia/Shanghai');
$scheme = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https' : 'http';
$host = isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : 'localhost';
$base = $scheme . '://' . $host;
$paths = array('/', '/features/', '/tutorial/', '/updates/', '/help/', '/tips/', '/faq/');
echo "<?xml version="1.0" encoding="UTF-8"?>
";
?>
<urlset xmlns="<?php echo 'http://' . 'www' . '.' . 'sitemaps' . '.' . 'org' . '/schemas/sitemap/0.9'; ?>">
<?php foreach ($paths as $path): ?>
  <url>
    <loc><?php echo htmlspecialchars($base . $path, ENT_XML1, 'UTF-8'); ?></loc>
    <lastmod><?php echo date('Y-m-d'); ?></lastmod>
    <changefreq><?php echo $path === '/' ? 'daily' : 'weekly'; ?></changefreq>
    <priority><?php echo $path === '/' ? '1.0' : '0.8'; ?></priority>
  </url>
<?php endforeach; ?>
</urlset>
