(PHP 5, PHP 7, PHP 8)
DOMElement::getAttributeNS — Returns value of attribute
$namespace, string $localName): string
Gets the value of the attribute in namespace namespace
with local name localName for the current node.
namespaceThe namespace URI.
localNameThe local name.
The value of the attribute, or an empty string if no attribute with the
given localName and namespace
is found.