<?php
header('Content-Type: text/plain');

$dir = __DIR__;
$files = glob($dir . '/sitemap-*.xml');

foreach ($files as $file) {
    $xml = simplexml_load_file($file);
    if ($xml === false) continue;

    foreach ($xml->url as $url) {
        if (isset($url->loc)) {
            echo trim((string)$url->loc) . "\n";
        }
    }
}
?>