DOM
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The DOMImplementation class

(PHP 5)

简介

The DOMImplementation interface provides a number of methods for performing operations that are independent of any particular instance of the document object model.

类摘要

DOMImplementation {
/* 属性 */
/* 方法 */
__construct ( void )
public DOMDocument createDocument ([ string $namespaceURI = NULL [, string $qualifiedName = NULL [, DOMDocumentType $doctype = NULL ]]] )
public DOMDocumentType createDocumentType ([ string $qualifiedName = NULL [, string $publicId = NULL [, string $systemId = NULL ]]] )
public bool hasFeature ( string $feature , string $version )
}

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DOM
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用户评论:

giorgio dot liscio at email dot it (2010-07-20 18:26:31)

officially, the w3 specifies that the way to access dom interfaces is through this class
so if you use
$doc = new DOMDocument("1.0", "UTF-8");
use instead:
$x = new DOMImplementation();
$doc = $x->createDocument(NULL,"rootElementName");
$doc->xmlVersion="1.0";
$doc->xmlEncoding="UTF-8";
it is not required by php's implementation, but, probably, it is a good practice
see:
http://w3.org/TR/DOM-Level-3-Core/core.html#DOMImplementation
http://w3.org/TR/DOM-Level-3-Core/core.html#DOMImplementationList
http://w3.org/TR/DOM-Level-3-Core/core.html#DOMImplementationSource

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