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

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);
?>