(PHP 5 >= 5.1.3)
SimpleXMLElement->addChild() — Adds a child element to the XML node
Adds a child element to the node and returns a SimpleXMLElement of the child.
The name of the child element to add.
If specified, the value of the child element.
If specified, the namespace to which the child element belongs.
The addChild method returns a SimpleXMLElement object representing the child added to the XML node.
Example#1 Add attributes and children to a SimpleXML element
<?php
include 'example.php';
$sxe = new SimpleXMLElement($xmlstr);
$sxe->addAttribute('type', 'documentary');
$movie = $sxe->addChild('movie');
$movie->addChild('title', 'PHP2: More Parser Stories');
$movie->addChild('plot', 'This is all about the people who make it work.');
$characters = $movie->addChild('characters');
$character = $characters->addChild('character');
$character->addChild('name', 'Mr. Parser');
$character->addChild('actor', 'John Doe');
$rating = $movie->addChild('rating', '5');
$rating->addAttribute('type', 'stars');
echo $sxe->asXML();
?>