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    DOMDocument::registerNodeClass

    (PHP 5 >= 5.2.0, PHP 7)

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

    설명

    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.

    인수

    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.

    반환값

    성공 시 TRUE를, 실패 시 FALSE를 반환합니다.

    변경점

    버전 설명
    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.

    예제

    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();

    ?>

    위 예제의 출력:

    <?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;
    ?>

    위 예제의 출력:

    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));
    ?>

    위 예제의 출력:

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

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    User Contributed Notes 2 notes

    up
    4
    crh3675 at gmail dot com
    15 years ago
    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.');
    }
    ?>
    up
    1
    arnold at adaniels dot nl
    15 years ago
    Note than save and saveXML are not affected by __toString().
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