DOM
The DOM extension is an extension that allows developers to work with XML documents using the Document Object Model, DOM, API. It provides a set of classes and functions to parse, manipulate, and generate XML documents.
The DOM extension provides a tree-based representation of an XML document, where each element, attribute, and text node is represented as an object. This allows developers to traverse and manipulate the XML document easily.
<?php
// from PHP manual : https://www.php.net/manual/en/class.domcomment.php
$xml = new DOMDocument();
$xml->loadXML('<?xml version=\1.0\ encoding=\utf-8\?>
<configuration version=\2\>
<!-- test --> -->
test -->
</configuration>'
);
$xpath = new DOMXPath($xml);
$comments = $xpath->query('//comment()');
$elements = $xpath->query('//configuration');
echo $comments[0]->textContent;
// result: test -->
echo $elements[0]->textContent;
// result: test -->
?>