Cum in PHP sa citim primul item(post) din Atom Feed

Mai jos va prezint un exemplu cum in PHP sa citesti primul item(post) al Atom feed, un exemplu de Atom feed vedeti aici http://donimd.blogspot.com/feeds/posts/default

$url="http://donimd.blogspot.com/feeds/posts/default";

$doc = new DOMDocument();
$doc->load($url);

$entries = $doc->getElementsByTagName("entry");

$tnl = $entries->item(0)->getElementsByTagName("title");

$tnl = $tnl->item(0);
$title = $tnl->firstChild->data;

$tnl = $entries->item(0)->getElementsByTagName("content");
$tnl = $tnl->item(0);
$description = $tnl->firstChild->data;

$tnl = $entries->item(0)->getElementsByTagName("link");
$tnl = $tnl->item(4);
$link = $tnl->getAttribute("href");

echo $title;
echo $link;
echo $description;

De fapt pe pagina doni.md este acest cod care si citeste primul post de pe http://donimd.blogspot.com/feeds/posts/default