DOMDocument
PHP Manual

DOMDocument::registerNodeClass

(PHP 5 >= 5.2.0, PHP 7)

DOMDocument::registerNodeClassRegister extended class used to create base node type

Descrierea

public bool DOMDocument::registerNodeClass ( string $baseclass , string $extendedclass )

This method allows you to register your own extended DOM class to be used afterward by the PHP DOM extension.

This method is not part of the DOM standard.

Parametri

baseclass

The DOM class that you want to extend. You can find a list of these classes in the chapter introduction.

extendedclass

Your extended class name. If NULL is provided, any previously registered class extending baseclass will be removed.

Valorile întoarse

Întoarce valoarea TRUE în cazul succesului sau FALSE în cazul eșecului.

Istoricul schimbărilor

Versiune Descriere
5.2.2 Prior to 5.2.2, a previously registered extendedclass had to be unregistered before being able to register a new class extending the same baseclass.

Exemple

Example #1 Adding a new method to DOMElement to ease our code

<?php

class myElement extends DOMElement {
   function 
appendElement($name) { 
      return 
$this->appendChild(new myElement($name));
   }
}

class 
myDocument extends DOMDocument {
   function 
setRoot($name) { 
      return 
$this->appendChild(new myElement($name));
   }
}

$doc = new myDocument();
$doc->registerNodeClass('DOMElement''myElement');

// From now on, adding an element to another costs only one method call ! 
$root $doc->setRoot('root');
$child $root->appendElement('child');
$child->setAttribute('foo''bar');

echo 
$doc->saveXML();

?>

Exemplul de mai sus va afișa:

<?xml version="1.0"?>
<root><child foo="bar"/></root>

Example #2 Retrieving elements as custom class

<?php
class myElement extends DOMElement {
    public function 
__toString() {
        return 
$this->nodeValue;
    }
}

$doc = new DOMDocument;
$doc->loadXML("<root><element><child>text in child</child></element></root>");
$doc->registerNodeClass("DOMElement""myElement");

$element $doc->getElementsByTagName("child")->item(0);
var_dump(get_class($element));

// And take advantage of the __toString method..
echo $element;
?>

Exemplul de mai sus va afișa:

string(9) "myElement"
text in child

Example #3 Retrieving owner document

When instantiating a custom DOMDocument the ownerDocument property will refer to the instantiated class, meaning there is no need (and in fact not possible) to use DOMDocument::registerNodeClass() with DOMDocument

<?php
class myDOMDocument extends DOMDocument {
}

class 
myOtherDOMDocument extends DOMDocument {
}

// Create myDOMDocument with some XML
$doc = new myDOMDocument;
$doc->loadXML("<root><element><child>text in child</child></element></root>");

$child $doc->getElementsByTagName("child")->item(0);

// The current owner of the node is myDOMDocument
var_dump(get_class($child->ownerDocument));

// Import a node from myDOMDocument
$newdoc = new myOtherDOMDocument;
$child $newdoc->importNode($child);

// The new owner of the node has changed to myOtherDOMDocument
var_dump(get_class($child->ownerDocument));
?>

Exemplul de mai sus va afișa:

string(13) "myDOMDocument"
string(18) "myOtherDOMDocument"


DOMDocument
PHP Manual