<?php
/**
 * Transform an XML file into XHTML via an XSL sheet
 * 
 * @author      Aidan Lister <aidan@php.net>
 * @version     3.1.0
 * @link        http://aidanlister.com/repos/v/function.xsl_transform.php
 */
function xsl_transform($xml_file, $xsl_file, $params = null)
{
	$xml = new DomDocument;
	$xml->load($xml_file);

	$xsl = new DomDocument;
	$xsl->load($xsl_file);

	$xslt = new XsltProcessor;

	$params = (array)$params;
	foreach ($params as $param => $value) {
		$xslt->setParameter(null, $param, $value);
	}

	$xslt->importStylesheet($xsl); 

	return $xslt->transformToXml($xml);
}

?>