query("SELECT slug, COALESCE(published_at, updated_at) AS dt FROM articles WHERE status='published' ORDER BY dt DESC LIMIT 500")->fetchAll() ?: []; $hubs = $pdo->query("SELECT slug, updated_at AS dt FROM hubs WHERE is_active=1 ORDER BY updated_at DESC")->fetchAll() ?: []; $base = rtrim($BASE_URL,'/'); echo "\n"; ?> hourly weekly weekly weekly