(PHP 5, PHP 7, PHP 8)
DOMImplementation::createDocumentType — Creates an empty DOMDocumentType object
$qualifiedName, string $publicId = "", string $systemId = ""): DOMDocumentType|falseCreates 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.
在 PHP 8.0.0 之前可以靜態(tài)調用此方法，但會(huì )發(fā)出
E_DEPRECATED 錯誤。自 PHP 8.0.0 起，靜態(tài)調用此方法會(huì )拋出 Error 異常
示例 #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();
?>
以上例程會(huì )輸出：
<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE graph SYSTEM "graph.dtd"> <graph/>