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Bug #81682 DocumentType nodes cannot be cloned nor imported
Submitted: 2021-12-01 08:01 UTC Modified: -
From: jules dot bernable at gmail dot com Assigned:
Status: Open Package: DOM XML related
PHP Version: 8.1.0 OS: irrelevant
Private report: No CVE-ID: None
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 [2021-12-01 08:01 UTC] jules dot bernable at gmail dot com 
Description:
------------
When trying to clone or import a doctype node, the operation always fail.
AFAICT there's nothing in the DOM standard saying this should be the case (see https://dom.spec.whatwg.org/#dom-document-importnode).


Test script:
---------------
$original = new DOMDocument();
$original->loadHTML('<!DOCTYPE html>');
$docytpe = $original->doctype->cloneNode();
var_dump($doctype); // false

$other = new DOMDocument();
$doctype = $other->importNode($original->doctype);
var_dump($doctype); // false

Expected result:
----------------
The result should be a new DocumentType node with the same name, publicId and systemId and, in the case of importNode, associated with the new document.

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