XSLT with PHP 5

$content = file_get_contents('http://www.pcinpact.com/include/news.xml');
if ( ! $content) {
    echo "<p>Unable to open remote file.\n";
    exit;
}
 
$xml = new DOMDocument;
$xml->loadXML($content);
 
$xsl = new DOMDocument;
$xsl->load('collection.xsl');
 
$proc = new XSLTProcessor;
$proc->importStyleSheet($xsl);
 
echo $proc->transformToXML($xml);

 
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 
  <xsl:template match="@*|node()">
    <xsl:copy>
      <xsl:apply-templates select="@*|node()"/>
    </xsl:copy>
  </xsl:template>
 
  <xsl:template match="/rss/channel/item[category='Internet']" />
  <xsl:template match="/rss/channel/item[category='PC']" />
 
</xsl:stylesheet>