PHP 7.0.6 Released

DOMNode::lookupNamespaceURI

(PHP 5, PHP 7)

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

Description

public string DOMNode::lookupNamespaceURI ( string $prefix )

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

Parameters

prefix

The prefix of the namespace.

Return Values

The namespace URI of the node.

See Also

User Contributed Notes

lewar
8 years ago
Simple way to get the URI of the default namespace:

<?php
    $document
= new DOMDocument();
   
$document->load($xml_file);
   
$uri = $document->documentElement->lookupnamespaceURI(NULL);
?>
_ michael
6 years ago
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).
To Top