https://www.php.net/manual/uk/domimplementation.createdocumenttype.php
PHP: DOMImplementation::createDocumentType - Manual
Creates an empty DOMDocumentType object
phpmanual
https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/createDocumentType
DOMImplementation: createDocumentType() method - Web APIs | MDN
The DOMImplementation.createDocumentType() method returns a DocumentType object which can either be used with DOMImplementation.createDocument upon document...
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