DOMImplementation 类

(PHP 5, PHP 7, PHP 8)

介绍

DOMImplementation 类提供了一些方法,用于执行与 DOM 对象模型的任何特定实例无关的操作。

类摘要

class DOMImplementation {
/* 方法 */
public createDocument(?string $namespace = null, string $qualifiedName = "", ?DOMDocumentType $doctype = null): DOMDocument|false
public createDocumentType(string $qualifiedName, string $publicId = "", string $systemId = ""): DOMDocumentType|false
public hasFeature(string $feature, string $version): bool
}

目录

添加注释

用户贡献的注释 1 个注释

6
LANGE.LUDO
9 年前
好的,使用“代理模式”和特征可以完美地实现它。其思路是在一个“特征”中声明公共方法,以便扩展的和注册的 Node 类即使没有从扩展的 DOMNode 派生或不是其子类也能访问它们…

这里有一个小片段
<?php
namespace my;

trait
tNode
{ // 我们需要魔术方法 __get,以便添加属性,例如 DOMNode->parentElement
public function __get($name)
{ if(
property_exists($this, $name)){return $this->$name;}
if(
method_exists($this, $name)){return $this->$name();}
throw new
\ErrorException('my\\Node property \''.(string) $name.'\' not found…', 42, E_USER_WARNING);
}

// parentElement 属性定义
private function parentElement()
{ if(
$this->parentNode === null){return null;}
if(
$this->parentNode->nodeType === XML_ELEMENT_NODE){return $this->parentNode;}
return
$this->parentNode->parentElement();
}

// JavaScript 等价物
public function isEqualNode(\DOMNode $node){return $this->isSameNode($node);}
public function
compareDocumentPosition(\DOMNode $otherNode)
{ if(
$this->ownerDocument !== $otherNode->ownerDocument){return DOCUMENT_POSITION_DISCONNECTED;}
$c = strcmp($this->getNodePath(), $otherNode->getNodePath());
if(
$c === 0){return 0;}
else if(
$c < 0){return DOCUMENT_POSITION_FOLLOWING | ($c < -1 ? DOCUMENT_POSITION_CONTAINED_BY : 0);}
return
DOCUMENT_POSITION_PRECEDING | ($c > 1 ? DOCUMENT_POSITION_CONTAINS : 0);
}
public function
contains(\DOMNode $otherNode){return ($this->compareDocumentPosition($otherNode) >= DOCUMENT_POSITION_CONTAINED_BY);}
}

class
Document extends \DomDocument
{ public function __construct($version=null, $encoding=null)
{
parent::__construct($version, $encoding);
$this->registerNodeClass('DOMNode', 'my\Node');
$this->registerNodeClass('DOMElement', 'my\Element');
$this->registerNodeClass('DOMDocument', 'my\Document');
/* [...] */
}
}

class
Element extends \DOMElement
{ use tNode;
/* [...] */
}

class
Node extends \DOMNode
{ use tNode;
/* [...] */
}

?>
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