PHP 5.4.33 Released

dom_import_simplexml

(PHP 5)

dom_import_simplexml Obtiene un objeto DOMElement desde un objeto SimpleXMLElement

Descripción

DOMElement dom_import_simplexml ( SimpleXMLElement $node )

Esta función toma el nodo node de la clase SimpleXML y lo convierte en un nodod DOMElement. Este nuevo objeto se puede usar como un nodo DOMElement nativo.

Parámetros

node

El nodo SimpleXMLElement.

Valores devueltos

El nodo DOMElement añdido o FALSE si ocurrió un error.

Ejemplos

Ejemplo #1 Importar SimpleXML a DOM con dom_import_simplexml()

<?php

$sxe 
simplexml_load_string('<books><book><title>blah</title></book></books>');

if (
$sxe === false) {
    echo 
'Error al analizar el documento';
    exit;
}

$dom_sxe dom_import_simplexml($sxe);
if (!
$dom_sxe) {
    echo 
'Error al convertir a XML';
    exit;
}

$dom = new DOMDocument('1.0');
$dom_sxe $dom->importNode($dom_sxetrue);
$dom_sxe $dom->appendChild($dom_sxe);

echo 
$dom->saveXML();

?>

Ver también

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User Contributed Notes 3 notes

up
2
crescentfreshpot at yahoo dot com
6 years ago
justinpatrin at php dot net:
> To get a proper DOM document (which you need to do most things) you need...

No you don't. Just do:
<?php
$dom
= dom_import_simplexml($xml)->ownerDocument;
?>
up
1
Jeff M
5 years ago
SimpleXML is an 'Object Mapping XML API'. It is not DOM, per se. SimpleXML converts the XML elements into PHP's native data types.

The dom_import_simplexml and simplexml_import_dom functions do *not* create separate copies of the original object. You are free to use the methods of either or both interchangeably, since the underlying instance is the same.

<?php
   
// initialize a simplexml object
   
$sxe = simplexml_load_string('<root/>');
   
   
// get a dom interface on the simplexml object
   
$dom = dom_import_simplexml($sxe);

   
// dom adds a new element under the root
   
$element = $dom->appendChild(new DOMElement('dom_element'));
   
   
// dom adds an attribute on the new element
   
$element->setAttribute('creator', 'dom');

   
// simplexml adds an attribute on the dom element
   
$sxe->dom_element['sxe_attribute'] = 'added by simplexml';

   
// simplexml adds a new element under the root
   
$element = $sxe->addChild('sxe_element');
   
   
// simplexml adds an attribute on the new element
   
$element['creator'] = 'simplexml';

   
// dom finds the simplexml element (via DOMNodeList->index)
   
$element = $dom->getElementsByTagName('sxe_element')->item(0);

   
// dom adds an attribute on the simplexml element
   
$element->setAttribute('dom_attribute', 'added by dom');
   
    echo (
'<pre>');           
   
print_r($sxe);
    echo (
'</pre>');
?>

Outputs:

SimpleXMLElement Object
(
    [dom_element] => SimpleXMLElement Object
        (
            [@attributes] => Array
                (
                    [creator] => dom
                    [sxe_attribute] => added by simplexml
                )

        )

    [sxe_element] => SimpleXMLElement Object
        (
            [@attributes] => Array
                (
                    [creator] => simplexml
                    [dom_attribute] => added by dom
                )

        )

)

What this illustrates is that both interfaces are operating on the same underlying object instance. Also, when you dom_import_simplexml, you can create and add new elements without reference to an ownerDocument (or documentElement).

So passing a SimpleXMLElement to another method does not mean the recipient is limited to using SimpleXML methods.

Hey Presto! Your telescope has become a pair of binoculars!
up
0
justinpatrin at php dot net
8 years ago
I've found that newer versions of PHP5 require some special syntax in order to properly convert between SimpleXML and DOM. It's not as easy as calling dom_import_simplexml() with a SimpleXML node. To get a proper DOM document (which you need to do most things) you need:
<?php
//$xml is a SimpleXML instance
$domnode = dom_import_simplexml($xml);
$dom = new DOMDocument();
$domnode = $dom->importNode($domnode, true);
$dom->appendChild($domnode);
?>

Switching back, though, is, well...simple.

<?php
//$dom is a DOMDocument instance
$xml = simplexml_import_dom($dom);
?>
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