(PHP 5)
DOMImplementation::createDocumentType — Creates an empty DOMDocumentType object
Creates an empty DOMDocumentType object. Entity declarations and notations are not made available. Entity reference expansions and default attribute additions do not occur.
The qualified name of the document type to create.
The external subset public identifier.
The external subset system identifier.
A new DOMDocumentType node with its ownerDocument set to NULL.
Raised if there is an error with the namespace, as determined by qualifiedName.
This method may be called statically, but will issue an E_STRICT error.
Example #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();
?>
以上例程会输出：
<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE graph SYSTEM "graph.dtd"> <graph/>