Laravelium/laravel-sitemap

<?= '<'.'?'.'xml version="1.0" encoding="UTF-8"?>'."\n"; ?>
<rdf:RDF xmlns="http://rorweb.com/0.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
<Resource rdf:about="sitemap">
    <title><?= $channel['title'] ?></title>
    <url><?= $channel['link'] ?></url>
    <type>sitemap</type>
</Resource>
<?php foreach ($items as $item) : ?>
<Resource>
    <url><?= $item['loc'] ?></url>
    <title><?= $item['title'] ?></title>
    <updated><?= date('Y-m-d\TH:i:sP', strtotime($item['lastmod'])) ?></updated>
    <updatePeriod><?= $item['freq'] ?></updatePeriod>
    <sortOrder><?= $item['priority'] ?></sortOrder>
    <resourceOf rdf:resource="sitemap"/>
</Resource>
<?php endforeach; ?>
</rdf:RDF>