https://www.php.net/manual/uk/domelement.setattributenode.php
PHP: DOMElement::setAttributeNode - Manual
Adds new attribute node to element
phpmanual
https://www.php.net/manual/zh/domelement.setattributenode.php
PHP: DOMElement::setAttributeNode - Manual
Adds new attribute node to element
phpmanual
https://lists.w3.org/Archives/Public/public-html-bugzilla/2010Apr/0315.html
[Bug 6689] [blocked on web dom core] Element.setAttributeNode() shouldn't modify the attribute node...