如何强制不自我关闭标签DOMdocument

How to generate Empty not self closing tag .

In fact, I need :

<IDX></IDX>

And some other tags with self closing tab ( so, LIBXML_NOEMPTYTAG doesn't work)

I try this :

$dom->createElement('IDX', '');

But, it's doesn't work

To resolve this problem I try to edit nodevalue directly :

$idx = $dom->createElement('IDX');
$idx->nodeValue = '';

And It's work .