(PHP 5 >= 5.1.2)
XMLReader::getAttributeNs — Get the value of an attribute by localname and URI
Returns the value of an attribute by name and namespace URI or an empty string if attribute does not exist or not positioned on an element node.
The local name.
The namespace URI.
The value of the attribute, or an empty string if no attribute with the given localName and namespaceURI is found or not positioned of element.