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# DOMImplementation->createDocumentType()

(no version information, might be only in CVS)

DOMImplementation->createDocumentType() -- Creates an empty DOMDocumentType object

## Beschreibung

class DOMImplementation {
DOMDocumentType createDocumentType ( [string qualifiedName [, string publicId [, string systemId]]] )
}

Creates an empty DOMDocumentType object. Entity declarations and notations are not made available. Entity reference expansions and default attribute additions do not occur.

## Parameter Liste

qualifiedName

  The qualified name of the document type to create.

publicId

  The external subset public identifier.

systemId

  The external subset system identifier.

## Rückgabewerte

A new DOMDocumentType node with its ownerDocument set to `NULL`.

## Beispiele

Beispiel 1. Creating a document with an attached DTD

`<?php
// Creates an instance of the DOMImplementation class
$imp = new DOMImplementation;
// Creates a DOMDocumentType instance
$dtd = $imp->createDocumentType('graph', '', 'graph.dtd');
// Creates a DOMDocument instance
$dom = $imp->createDocument("", "", $dtd);
// Set other properties
$dom->encoding = 'UTF-8';
$dom->standalone = false;
// Create an empty element
$element = $dom->createElement('graph');
// Append the element
$dom->appendChild($element);
// Retrieve and print the document
echo $dom->saveXML();
?>`

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
    <!DOCTYPE graph SYSTEM "graph.dtd">
    <graph/>

## Exceptions

`DOM_NAMESPACE_ERR`

  Raised if there is an error with the namespace, as determined by qualifiedName.

## Siehe auch

DOMImplementation->createDocument()

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