Beware if you're working with classes you've extended from DOMNode, DOMElement, etc.
Calling importNode() with an object of your derived class will result in the copy being an instance of the DOM super class.
You will *not* get a copy of the derived class or any of its properties or methods.
For example:
<?
class extDOMElement extends DOMElement {
function __construct($name, $value='', $namespaceURI=null) {
parent::__construct($name, $value, $namespaceURI);
}
}
class extDOMDocument extends DOMDocument {
// over-ride DOMDocument->createElement()
public function createElement($name, $value) {
// intention is to set extDOMElement->ownerDocument property
$orphan = new extDOMElement($name, $value);
$adopt = $this->importNode($orphan, true);
/* at this point $adopt is expected to be an instance of
* extDOMElement with ownerDocument property set
*/
return $adopt; // but $adopt is only a DOMElement
}
}
$doc = new extDOMDocument();
$el = $doc->createElement('tagName');
echo 'Element instanceof '.get_class($el);
?>
Will display "Element instanceof DOMElement" rather than the expected "extDOMElement"
DOMDocument->importNode()
(no version information, might be only in CVS)
DOMDocument->importNode() -- Import node into current document说明
class DOMDocument {DOMNode importNode ( DOMNode importedNode [, bool deep] )
}
This function returns a copy of the node to import and associates it with the current document.
参数
- importedNode
The node to import.
- deep
If set to TRUE, this method will recursively import the subtree under the importedNode.
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User Contributed Notes
TJ <php at tjworld dot net>
04-Nov-2005 05:15
04-Nov-2005 05:15
Fitopaldi
04-Aug-2005 02:29
04-Aug-2005 02:29
importNode returns a copy of the node to import and associates it with the current document, but not import the node to the current DOMDocument. Use appendChild for import the copy of the node to current DOMDocument.
<?
$domNode = $dom->importNode($aDomNode, true);
$currentDomDocument->appendChild($domNode);
?>