DOMImplementation クラス

(PHP 5, PHP 7, PHP 8)

はじめに

DOMImplementation クラスは、個々のドキュメントオブジェクトモデルのインスタンス独自の操作を行うためのメソッド群を提供します。

クラス概要

class DOMImplementation {

/* メソッド */

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

}

DOMImplementation::__construct — 新しい DOMImplementation オブジェクトを作成する
DOMImplementation::createDocument — 指定した型とドキュメント要素の DOMDocument オブジェクトを作成する
DOMImplementation::createDocumentType — 空の DOMDocumentType オブジェクトを作成する
DOMImplementation::hasFeature — DOM 実装が、指定した機能を実装しているかどうかを調べる

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User Contributed Notes 1 note

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LANGE.LUDO ¶

10 years ago

Ok got it working like a charm using "proxy pattern" with traits. The idea being declaring the common methods inside a "trait" in order for extended and registered Node Classes to have access even if not derived / child of the extended DOMNode…

Here a small snippet :
<?php
    namespace my;

    trait tNode
    {    // We need the magic method __get in order to add properties such as 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 property definition
        private function parentElement()
        {    if($this->parentNode === null){return null;}
            if($this->parentNode->nodeType === XML_ELEMENT_NODE){return $this->parentNode;}
            return $this->parentNode->parentElement();
        }

        // JavaScript equivalent
        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;
        /* [...] */
    }

?>