oxsimplexml.php

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<?php

class oxSimpleXml
{

    public function objectToXml($oInput, $sDocument)
    {
        $oXml = new SimpleXMLElement("<?xml version=\"1.0\" encoding=\"utf-8\"?><$sDocument/>");
        $this->_addSimpleXmlElement($oXml, $oInput);

        return $oXml->asXml();
    }

    public function xmlToObject($sXml)
    {
        return simplexml_load_string($sXml);
    }

    protected function _addSimpleXmlElement($oXml, $oInput, $sPreferredKey = null)
    {
        $aElements = is_object($oInput) ? get_object_vars($oInput) : (array) $oInput;

        foreach ($aElements as $sKey => $mElement) {
            $oXml = $this->_addChildNode($oXml, $sKey, $mElement, $sPreferredKey);
        }

        return $oXml;
    }

    protected function _addChildNode($oXml, $sKey, $mElement, $sPreferredKey = null)
    {
        $aAttributes = array();
        if (is_array($mElement) && array_key_exists('attributes', $mElement) && is_array($mElement['attributes'])) {
            $aAttributes = $mElement['attributes'];
            $mElement = $mElement['value'];
        }

        if (is_object($mElement) || is_array($mElement)) {
            if (is_int(key($mElement))) {
                $this->_addSimpleXmlElement($oXml, $mElement, $sKey);
            } else {
                $oChildNode = $oXml->addChild($sPreferredKey? $sPreferredKey : $sKey);
                $this->_addNodeAttributes($oChildNode, $aAttributes);
                $this->_addSimpleXmlElement($oChildNode, $mElement);
            }
        } else {
            $oChildNode = $oXml->addChild($sPreferredKey? $sPreferredKey : $sKey, $mElement);
            $this->_addNodeAttributes($oChildNode, $aAttributes);
        }

        return $oXml;
    }

    protected function _addNodeAttributes($oNode, $aAttributes)
    {
        $aAttributes = (array) $aAttributes;
        foreach ($aAttributes as $sKey => $sValue) {
            $oNode->addAttribute($sKey, $sValue);
        }

        return $oNode;
    }
}