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The DOMImplementation class

(PHP 5, PHP 7, PHP 8)

Introduction

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

Class synopsis

class DOMImplementation {
/* Methods */
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
}

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User Contributed Notes 1 note

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LANGE.LUDO
9 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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