(PHP 5 >= 5.1.0, PHP 7, PHP 8)
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.
nameThe local name.
namespaceThe namespace URI.
The value of the attribute, or null if no attribute with the given
name and namespace is
found or not positioned of element.