SunshinePHP Developer Conference 2015

DOMElement::getElementsByTagNameNS

(PHP 5)

DOMElement::getElementsByTagNameNSGet elements by namespaceURI and localName

Description

public DOMNodeList DOMElement::getElementsByTagNameNS ( string $namespaceURI , string $localName )

This function fetch all the descendant elements with a given localName and namespaceURI.

Parameters

namespaceURI

The namespace URI.

localName

The local name. Use * to return all elements within the element tree.

Return Values

This function returns a new instance of the class DOMNodeList of all matched elements in the order in which they are encountered in a preorder traversal of this element tree.

See Also

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User Contributed Notes 1 note

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spam at chovy dot com
5 years ago
I had some difficulty stripping all default NS attributes for an ns-uri in one shot, the following will work though...first strip the documentElement namespace, then getElementsByTagNameNS() -- the documentation should reflect that the 2nd argument is actually the name of the tag, not the local namespace prefix as I first expected:

<?php

function strip_default_ns( $xml = null, $ns_uri = 'http://example.com/XML-Foo' ) {
   
$ns_local = '';
   
$ns_tag = '*';
   
    if ( empty(
$xml) ) return false;
   
   
//remove document namespace
   
$dom = new DOMDocument();
   
$dom->loadXML($xml);
   
$dom->documentElement->removeAttributeNS($ns_uri, $ns_local);
   
   
//strip element namespaces
   
foreach ( $dom->getElementsByTagNameNS($ns_uri, $ns_tag) as $elem ) {
       
$elem->removeAttributeNS($ns_uri, $ns_local);
    }

    return
$dom->saveXML();
}

$stripped_xml = strip_default_ns($the_xml);

?>

$stripped_xml can now take advantage of running XPath queries on it for the NULL namespace.
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