(PHP 5, PHP 7) Registers the namespace with the

(PHP 5 >= 5.3.0, PHP 7) Register PHP functions as XPath functions

(PHP 5, PHP 7) Creates a new DOMXPath

(PHP 5, PHP 7) Evaluates the given XPath expression

(PHP 5 >= 5.1.0, PHP 7) Evaluates the given XPath expression and returns a typed result if possible