<?php

// Load the two XML sources
$xml = new DomDocument;
$xml->load( 'data.xml' );
$xsl = new DomDocument;
$xsl->load( 'overview.xsl' );

// Transform
$proc = new XSLTProcessor;
$proc->importStyleSheet($xsl);
$result = $proc->transformToXML($xml);

if ($result) {
    print $result;
} else {
    print "Transformed failed.\n";
}

?>