<?php
header('Content-Type: application/xml');
echo '<?xml version="1.0" encoding="UTF-8"?>';
echo '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">';

$pdo = new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME.";charset=utf8mb4", DB_USER, DB_PASS);
$rows = $pdo->query("SELECT slug, updated_at FROM osmrtnice WHERE status='aktivan'")->fetchAll();

foreach($rows as $r){
    echo '<url><loc>'.BASE_URL.'/'.htmlspecialchars($r['slug']).'</loc><lastmod>'.date('c', strtotime($r['updated_at'])).'</lastmod></url>';
}

echo '</urlset>';