The DOMImplementation class

(PHP 5, PHP 7, PHP 8)

Вступ

This class provides a number of methods for performing operations that are independent of any particular instance of the document object model.

Короткий огляд класу

class DOMImplementation {

/* Методи */

public createDocument(?string $namespace = null, string $qualifiedName = "", ?DOMDocumentType $doctype = null): DOMDocument

public createDocumentType(string $qualifiedName, string $publicId = "", string $systemId = ""): DOMDocumentType|false

public hasFeature(string $feature, string $version): bool

}

Зміст

DOMImplementation::__construct — Creates a new DOMImplementation object
DOMImplementation::createDocument — Creates a DOMDocument object of the specified type with its document element
DOMImplementation::createDocumentType — Creates an empty DOMDocumentType object
DOMImplementation::hasFeature — Test if the DOM implementation implements a specific feature

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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;
        /* [...] */
    }

?>

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