[php-src] Issue #13012: DOMNode::isEqualNode() is incorrect when attribute order is different

Issue: https://github.com/php/php-src/issues/13012 Author: JoshyPHP ### Description [The spec says](https://dom.spec.whatwg.org/#concept-node-equals): *"If A is an element, each attribute in its attribute list has an attribute that equals an attribute in B’s attribute list."* The order in which the attributes are listed should not matter. I double checked the expected behaviour in Gecko/Blink just in case. ```php <?php $dom = new DOMDocument; // <x a="a" b="b"/> $el1 = $dom->createElement('x'); $el1->setAttribute('a', 'a'); $el1->setAttribute('b', 'b'); // <x b="b" a="a"/> $el2 = $dom->createElement('x'); $el2->setAttribute('b', 'b'); $el2->setAttribute('a', 'a'); var_dump($el1->isEqualNode($el2)); ``` Resulted in this output: ``` bool(false) ``` But I expected this output instead: ``` bool(true) ``` ### PHP Version PHP 8.3.1 ### Operating System _No response_