oxsimplexml.php

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<?php

class oxSimpleXml
{
    protected function _addSimpleXmlElement($oXml, $oInput)
    {
        if (is_object( $oInput )) {
            $aObjectVars = get_object_vars( $oInput );
        } elseif (is_array($oInput) ) {
            $aObjectVars = $oInput;
        } else {
            return $oXml;
        }

        foreach ($aObjectVars as $sKey => $oVar) {
            if (is_object( $oVar ) ) {
                $oChildNode = $oXml->addChild($sKey);
                $this->_addSimpleXmlElement($oChildNode, $oVar);
            } elseif (is_array( $oVar) ) {
                foreach ($oVar as $oSubValue) {
                    //this check for complex type is probably redundant, but I give up to solve it over single recursion call
                    //use existing Unit tests for refactoring
                    if (is_array($oSubValue) || is_object($oSubValue)) {
                        $oChildNode = $oXml->addChild($sKey);
                        $this->_addSimpleXmlElement($oChildNode, $oSubValue);
                    } else {
                        $oXml->addChild($sKey, $oSubValue);
                    }
                }
            } else {
                //assume $oVar is string
                $oXml->addChild($sKey, $oVar);
            }
        }

        return $oXml;
    }

    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);
    }
}