zendframework/zf2 — pull request #1791 by sasezaki (2012-07-07 13:28:15+00:00)
Title: enable DOMXPath::registerPhpFunctions in Zend\Dom\Query

DOMXPath::registerPhpFunctions introduces in PHP 5.3
http://jp2.php.net/manual/en/domxpath.registerphpfunctions.php
http://arr.gr/blog/2010/04/xpath-regular-expression-matching-in-php-5-3/
This feature will offer xpath more easier.