(PHP 5, PHP 7)
The DOMImplementation interface 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 $doctype
= NULL
]]] )$qualifiedName
= NULL
[, string $publicId
= NULL
[, string $systemId
= NULL
]]] )