XSL is a powerful language but a little counterintuitive. You can do a lot with surprisingly little code, but sometimes it will cost you hours and you won’t work it out.

To use XSL parsing you need to have the libxslt compiled into PHP.

You transform XML document by applying the XSLT transform with the XSLT stylesheet.

In php:

// Load XSL
$xsl = newDOMDocument; $xsl->load('stylesheet.xsl');

// Create new XSLTProcessor
$xslt = new XSLTProcessor();
// Load stylesheet
$xslt->importStylesheet($xsl);

// Load XML-document
$feed = file_get_contents('http://.../yourRSSfeed.xml')
$xml = new DOMDocument; $xml->loadXML($feed);

// Transform into outputstring
echo $results = $xslt->transformToXML($xml);

The xml is your RSS-feed, that is easy.

The XSLT stylesheet has to look like this. You start by telling what kind of file it is.

<xsl :stylesheet version="1.0"
   xmlns:xsl = "http://www.w3.org/1999/XSL/Transform">
      <xsl  utput method="xml"
      omit-xml-declaration="yes"/>
</xsl>

Then we code which nodes to transform, look for an rss root tag:
<code><xsl :template match="/rss"></xsl></code>

and do this print list of all items:
<pre><p id="MyFeed">….</p></pre>
<pre> <xsl :for-each select="//item"></xsl></pre>

<pre>
<a href="{link}"><xsl :value-of select="title" /></a>
</pre>
Value of select , selects the textcontent of the title tag.
{link} is the same but a shortcut for easy use between quotation marks.
With title of item als text and link-url as url.

Complete xsl-stylesheet:

<xsl :stylesheet version="1.0"
     xmlns:xsl = "http://www.w3.org/1999/XSL/Transform">
  <xsl  utput method="xml"
     omit-xml-declaration="yes"/></xsl><xsl :template match="/rss">
  <ul id="nieuws">
  <xsl :for-each select="//item">
   <li class="style">
       <a href="{link}">
  <xsl :value-of select="title" /></a>
   </li>
  </xsl>
 </ul>
</xsl>  

Save this to your directory as stylesheet.xsl and run the earlier phpcode.
This will give you a simple list with url and names of the posts.