DOMNode::lookupNamespaceURI

(PHP 5, PHP 7, PHP 8)

DOMNode::lookupNamespaceURI — Gets the namespace URI of the node based on the prefix

public DOMNode::lookupNamespaceURI(?string $prefix): ?string

Gets the namespace URI of the node based on the prefix.

prefix: The prefix to look for. If this parameter is null, the method will return the default namespace URI, if any.

Returns the associated namespace URI or null if none is found.

DOMNode::lookupPrefix() - Gets the namespace prefix of the node based on the namespace URI