Last updated: Fri, 20 Nov 2009

DOMDocument::registerNodeClass

(PHP 5 >= 5.2.0)

DOMDocument::registerNodeClass — Register extended class used to create base node type

Opis

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.

Parametry

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.

Zwracane wartości

Zwraca TRUE w przypadku powodzenia, FALSE w przypadku błędu.

Rejestr zmian

Wersja	Opis
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` .

Przykłady

Przykład #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();

?>

Powyższy przykład wyświetli:

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

Przykład #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;
?>

Powyższy przykład wyświetli:

string(9) "myElement"
text in child

Przykład #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));
?>

Powyższy przykład wyświetli:

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

add a note User Contributed Notes
DOMDocument::registerNodeClass

crh3675 at gmail dot com
26-Sep-2009 03:23


Creating innerHTML and outerHTML



<?php



class DOMHTMLElement extends DOMElement

{

    function __construct() { parent::__construct();} 

    

    public function innerHTML()

    {

        $doc = new DOMDocument();

      foreach ($this->childNodes as $child){

          $doc->appendChild($doc->importNode($child, true));

        }

        $content = $doc->saveHTML();

        return $content;

    }

    

    public function outerHTML()

    {

        $doc = new DOMDocument();

        $doc->appendChild($doc->importNode($this, true));

        $content = $doc->saveHTML();

        return $content;

    }

}



$dom = DOMDocument::loadHTMLFile($file);

$dom->registerNodeClass('DOMElement','DOMHTMLElement');

            

if($dom)

{

    $xpath = new DOMXpath($dom);    

    $regions = $xpath->query("//*[contains(@class, 'editable')]");    

    $content = '';

    

    foreach($regions as $region){

        $content .= $region->outerHTML();

    }    

    

    return $content;

    

}else{                

    throw new Exception('Cannot parse HTML.  Please verify the syntax is correct.');

}

?>

arnold at adaniels dot nl
22-Jul-2009 10:10


Note than save and saveXML are not affected by __toString().

add a note

DOMDocument::relaxNGValidate

DOMDocument::normalizeDocument

Last updated: Fri, 20 Nov 2009