Description:
------------
See example

Reproduce code:
---------------
<?php

function __autoload($className) {
        var_dump($className);
	exit();
}

$xsl = new DomDocument();
$xsl->loadXML('<?xml version="1.0" encoding="iso-8859-1" ?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:php="http://php.net/xsl">
<xsl:template match="/">
<xsl:value-of select="php:function(\'TeSt::dateLang\')" />
</xsl:template>
</xsl:stylesheet>');
$inputdom = new DomDocument();
$inputdom->loadXML('<?xml version="1.0" encoding="iso-8859-1" ?>
<today></today>');

$proc = new XsltProcessor();
$proc->registerPhpFunctions();
$xsl = $proc->importStylesheet($xsl);
$newdom = $proc->transformToDoc($inputdom);
?>

Expected result:
----------------
string(4) "TeSt"

Actual result:
--------------
string(4) "test"