(PHP 5, PHP 7)
DOMImplementation::createDocumentType — Creates an empty DOMDocumentType object
$qualifiedName = NULL
[, string $publicId = NULL
[, string $systemId = NULL
]]] )Creates an empty DOMDocumentType object. Entity declarations and notations are not made available. Entity reference expansions and default attribute additions do not occur.
qualifiedNameThe qualified name of the document type to create.
publicIdThe external subset public identifier.
systemIdThe external subset system identifier.
A new DOMDocumentType node with its
ownerDocument set to NULL.
DOM_NAMESPACE_ERR
Raised if there is an error with the namespace, as determined by
qualifiedName.
此方法可以被静态调用,但会抛出一个 E_STRICT 错误。
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/>