Read XML in php

[karl-phpfreaks]

From this tutorial - section on Adding nodes

 

http://www.phpfreaks.com/tutorial/handling-xml-data

 

When I use my xml file it creates the node but does not insert the new data. There are no page errors. I'm sure I have just missed something very simple and after hours of trying I will now bow down and ask for help.

 

Script

 

<?php
// isbn => pages
$page_numbers = array(
                '1234' => '654', // A Thousand Splendid Suns
                '5678' => '789', // The Brief Wondrous Life of Oscar Wao
        );

$dom = new DOMDocument();
$dom->load('edtest.xml');
$xpath = new DOMXPath($dom);

$items = $xpath->query('item');
foreach($items as $item)
{
        $item->appendChild($dom->createElement('catparent', $page_numbers[$item->getAttribute('catcode')]));
}

$dom->save('edtest_new.xml');
?>

 

The XML File

 

<?xml version="1.0" encoding="UTF-8"?>

<items>
<item>
<catcode>1234</catcode>
<catdesc>Systems - System Bundles</catdesc>
<price_cost>999.95</price_cost>
<price_sell>999.95</price_sell>
</item>
</items>

 

XML output file

 

<?xml version="1.0" encoding="UTF-8"?>

<items>
<item>
<catcode>1234</catcode>
<catdesc>Systems - System Bundles</catdesc>
<price_cost>999.95</price_cost>
<price_sell>999.95</price_sell>

<catparent></catparent> // it creates but does not insert required data

</item>
</items>

 

It runs the script creates the required node, but it does not insert the required data.  The object of the script is to find <catcode> = 1234 and add a new <catparent> </catparent> with required data from the array. If there  is a better way to achieve the result an example or just highlight the correct needed.

 

Thanks