(PHP 5, PHP 7)
The DOMImplementation class provides a number of methods for performing operations that are independent of any particular instance of the document object model.
$namespaceURI
= null
, string $qualifiedName
= null
, DOMDocumentType $doctype
= null
) : DOMDocument$qualifiedName
= null
, string $publicId
= null
, string $systemId
= null
) : DOMDocumentType