[RESOLVED] DOMdocument - removing a node and its children

[noahssite]

Hello here is an outline of my XML file.

<userlist>
<user>
<name>Bob</name>
<time>11:04:23</time>
</user>
<user>
<name>John</name>
<time>11:02:03</time>
</user>
</userlist>

Here is the PHP file that adds to the XML file, if anyone needed to see it.

<?php
$dname = $_POST['dname'];
$ptime = $_POST['ptime'];
////////////////////////////////////
$doc = new DOMDocument();
$doc->load('userupdate.xml');

$user = $doc->createElement("user");
$doc->getElementsByTagName('userlist')->item(0)->appendChild($user);

$name = $doc->createElement("name");
$user->appendChild($name);

$time = $doc->createElement("time");
$user->appendChild($time);

$textName = $doc->createTextNode($dname);
$name->appendChild($textName);

$textTime = $doc->createTextNode($ptime);
$time->appendChild($textTime);

$doc->save("userupdate.xml");
?>

What I need to do is to loop through the XML file, using the DOMdocument, and remove all 'users' that have a time that is 2 seconds less than the current UTC time. Since each 'user' element has children they will have to be deleted too.

How do I do this?