DOMDocument->registerNodeClass()
(PHP 5 >= 5.2.0)
DOMDocument->registerNodeClass() — Register extended class used to create base node type
Beschreibung
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.
Parameter Liste
- baseclass
-
The DOM class that you want to extend. You can find a list of these classes in the chapter introduction.
Of course, you won't be able to register a class extending DOMDocument but you can always start your document by instanciating your own extending class.
- extendedclass
-
Your extended class name. If NULL is provided, any previously registered class extending baseclass will be removed.
Rückgabewerte
Gibt bei Erfolg TRUE zurück, im Fehlerfall FALSE.
ChangeLog
| Version | Beschreibung |
|---|---|
| PHP 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 . |
Beispiele
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();
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
<?xml version="1.0"?> <root><child foo="bar"/></root>