Dom\HTMLElement::getElementsByClassName() not implemented

[cscott]

Description

The following code:

<?php
$doc = Dom\HTMLDocument::createFromString('');
$el = $doc->createElement('div');
$el->getElementsByClassName('foo');
echo("Success.\n");

Resulted in this output:

Error  Call to undefined method Dom\HTMLElement::getElementsByClassName().

But I expected this output instead:

Success.

Documentation for this method is at: https://developer.mozilla.org/en-US/docs/Web/API/Element/getElementsByClassName
and it is standardized at https://dom.spec.whatwg.org/#ref-for-dom-element-getelementsbyclassname

PHP Version

PHP 8.4.6 (cli) (built: Apr 11 2025 02:19:40) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.4.6, Copyright (c) Zend Technologies
    with Zend OPcache v8.4.6, Copyright (c), by Zend Technologies

Operating System

Ubuntu 24.04.2 LTS