DOMImplementation::createDocumentType
(PHP 5, PHP 7, PHP 8)
DOMImplementation::createDocumentType — Creates an empty DOMDocumentType object
說明
$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.
參數
-
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.
錯誤／異常
-
DOM_NAMESPACE_ERR -
Raised if there is an error with the namespace, as determined by
qualifiedName.
在 PHP 8.0.0 之前可以靜態呼叫此方法，但會發出
E_DEPRECATED 錯誤。自 PHP 8.0.0 起，靜態呼叫此方法會拋出 Error 異常
範例
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();
?>
以上例程會輸出：
<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE graph SYSTEM "graph.dtd"> <graph/>
參見
- DOMImplementation::createDocument() - Creates a DOMDocument object of the specified type with its document element