DOMNode::lookupNamespaceUri

(PHP 5, PHP 7, PHP 8)

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

说明

public DOMNode::lookupNamespaceUri ( string $prefix ) : string

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

参数

prefix: The prefix of the namespace.

返回值

The namespace URI of the node.

参见

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

User Contributed Notes

_ michael 30-Apr-2010 02:22


You have to pass *null* to lookupNamespaceURI if you want to read the default namespace. Passing an empty string doesn't work - even though the documentation says that lookupNamespaceURI takes a string as argument (and null would just be converted to an empty string).

lewar 05-Jun-2007 05:20


Simple way to get the URI of the default namespace:



<?php

    $document = new DOMDocument();

    $document->load($xml_file);

    $uri = $document->documentElement->lookupnamespaceURI(NULL);

?>