PHP XML inserting element after (or before) another element

Question

I have a previously generated XML like this:

Answer 1

Fetch the node and use

• DOMNode::insertBefore — Adds a new child before a reference node

instead of appending to the documentElement.

You can do that from the DOMDocument as well when passing in the shop node as second argument. Personally, I find it easier to just do that from the shop node because you have to fetch it anyway:

$shopNode->insertBefore($newNode);