(PHP 5)
DOMDocument::createElementNS — Create new element node with an associated namespace
This function creates a new element node with an associated namespace. 本节点不会出现在文档中，除非是用例如 DOMNode->appendChild() 函数来将其插入。
The URI of the namespace.
The qualified name of the element, as prefix:tagname.
The value of the element. By default, an empty element will be created. You can also set the value later with DOMElement->nodeValue.
The new DOMElement or FALSE if an error occured.
Raised if qualifiedName contains an invalid character.
Raised if qualifiedName is a maformed qualified name.
Example #1 Creating a new element and inserting it as root
<?php
$dom = new DOMDocument('1.0', 'iso-8859-1');
$element = $dom->createElementNS('http://www.example.com/XFoo', 'xfoo:test', 'This is the root element!');
// We insert the new element as root (child of the document)
$dom->appendChild($element);
echo $dom->saveXML();
?>
上例将输出：
<?xml version="1.0" encoding="iso-8859-1"?> <xfoo:test xmlns:xfoo="http://www.example.com/XFoo">This is the root element!</xfoo:test>