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;?>
(PHP 5, PHP 7, PHP 8)
dom_import_simplexml — Obtém um objeto DOMAttr ou DOMElement a partir de um objeto SimpleXMLElement
Esta função toma o nó node de um atributo ou de um elemento (uma
instância de SimpleXMLElement) e cria um nó
DOMAttr ou DOMElement, respectivamente.
O novo DOMNode refere-se ao mesmo nó XML subjacente
de SimpleXMLElement.
O objeto DOMAttr ou DOMElement.
| Versão | Descrição |
|---|---|
| 8.0.0 |
Esta função não retorna mais null em caso de falha.
|
Exemplo #1 Importa SimpleXML para o DOM com dom_import_simplexml()
<?php
$sxe = simplexml_load_string('<livros><livro><titulo>Blá</titulo></livro></livros>');
if ($sxe === false) {
echo 'Erro ao analisar o documento';
exit;
}
$dom_sxe = dom_import_simplexml($sxe);
if (!$dom_sxe) {
echo 'Erro ao converter o XML';
exit;
}
$dom = new DOMDocument('1.0');
$dom_sxe = $dom->importNode($dom_sxe, true);
$dom_sxe = $dom->appendChild($dom_sxe);
echo $dom->saveXML();
?>O exemplo acima produzirá:
<?xml version="1.0"?> <livros><livro><titulo>Blá</titulo></livro></livros>
Exemplo #2 Importa SimpleXML para o DOM e modifica SimpleXML por meio do DOM
Tratamento de erros omitido por questões de brevidade.
<?php
$sxe = simplexml_load_string('<livros><livro><titulo>Blá</titulo></livro></livros>');
$elt = dom_import_simplexml($sxe);
$elt->setAttribute("foo", "bar");
echo $sxe->asXML();
?>O exemplo acima produzirá:
<?xml version="1.0"?> <livros foo="bar"><livro><titulo>Blá</titulo></livro></livros>
justinpatrin at php dot net:> To get a proper DOM document (which you need to do most things) you need...No you don't. Just do: <?php$dom = dom_import_simplexml($xml)->ownerDocument;?>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!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($dom);?>//No need to initiate, import and append on example#1(...)$dom_sxe = dom_import_simplexml($sxe);if (!$dom_sxe) { echo 'Erreur lors de la conversion du XML'; exit;}//$dom = new DOMDocument('1.0');//$dom_sxe = $dom->importNode($dom_sxe, true);//$dom_sxe = $dom->appendChild($dom_sxe);//use ownerDocument propertie echo $dom->ownerDocument->saveXML();?>Very useful to add a CDATA node with SimpleXMLElement (use it like addChild) :<?phpclass My_SimpleXMLElement extends SimpleXMLElement { public function addChildWithCData($name, $value = NULL) { $new_child = $this->addChild($name); $node = dom_import_simplexml($new_child); $no = $node->ownerDocument; $node->appendChild($no->createCDATASection($value)); return $new_child; }}