DOMImplementation->createDocumentType()

Creates an empty DOMDocumentType object ()

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.

参数

qualifiedName

The qualified name of the document type to create.

publicId

The external subset public identifier.

systemId

The external subset system identifier.

返回值

A new DOMDocumentType node with its ownerDocument set to NULL.

范例

例 481. 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();

?>

上例将输出:

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

异常

DOM_NAMESPACE_ERR

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