Hvordan integreres php i XML ?

Jeg er nået frem til dette som virker, men de items der er skal erstattes af en while-løkke eller noget lignende...

<?xml version="1.0" encoding="iso-8859-1"?>
<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:sy="http://purl.org/rss/1.0/modules/syndication/" xmlns:admin="http://webns.net/mvcb/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:content="http://purl.org/rss/1.0/modules/content/">
<channel>
<language>da</language>
<copyright>Copyright 2004, dallerweb.dk</copyright>
<docs>http://blogs.law.harvard.edu/tech/rss</docs>
<image>
<url>http://newz.dk/gfx/newz-rss-logo.gif</url>
<title>newz.dk</title>
<link>http://newz.dk/</link>
</image>
<textInput>
<title>find</title>
<description>Her kan du se dit skema, hvis du ellers har indtastet det rigtige studieid</description>
<name>form_key</name>
<link>ihttp://newz.dk/news-search.php</link>
</textInput>

<item>
<title>1. time</title>
<link></link>
<description>ge</description>
</item>

<item>
<title>2. time</title>
<link></link>
<description></description>
</item>

<item>
<title>3. time</title>
<link></link>
<description></description>
</item>

<item>
<title>4. time</title>
<link></link>
<description></description>
</item>

<item>
<title>5. time</title>
<link></link>
<description></description>
</item>

<item>
<title>6. time</title>
<link></link>
<description></description>
</item>

<item>
<title>7. time</title>
<link></link>
<description></description>
</item>

<item>
<title>8. time</title>
<link></link>
<description></description>
</item>


</channel>
</rss>