Manipulating XML with Dom - php

Question

i'm trying to manipulate an xml by adding a few custom tags.
I managed to add a custom Element and a TextNode on it, but it gets rendered at the very bottom of the XML.
How do i add this custom tag as a child of another tag? i tried using the following code:
$product_record = $xml->documentElement->getElementsByTagName('product_record');
and then
$text = $test->appendChild($product_record);
But it doesn't seem to be working.
Here's where i got stuck:
http://viper-7.com/CsRNHU
How do i get the test tag to be rendered inside product_record?
Thanks,
Thales

Answer 1

Taking your full example you add the new element to the document itselt, not the fetched node.
The getElementsByTagName() method returns a list of nodes, not a single node, so you need to use a loop or fetch a specific element from the list.
$xml = new DOMDocument();
$xml->load($url);
$products = $xml->documentElement->getElementsByTagName('product_record');
foreach ($products as $product) {
$test = $product
->appendChild($xml->createElement('test'))
->appendChild($xml->createTextNode("testing"));
}
echo $xml->saveXML();
The DOMDocument::create*() methods create specific nodes and return them. The appendChild() method adds it to a parent node and returns the added node.
Your example returns an UTF-16 encoded XML. Import it into an UTF-8 XML document if you want to change the encoding:
$utf8 = new DOMDocument('1.0', 'UTF-8');
$utf8->appendChild($utf8->importNode($xml->documentElement, TRUE));
Demo: http://viper-7.com/1eCPeo