php xml to array

function xml2array($xmlstring)
{
	$xml = simplexml_load_string($xmlstring);
	$json = json_encode($xml);
	return json_decode($json,TRUE);
}

function array2Xml($array, $rootElement = null, $xml = null) 
{ 
    $_xml = $xml; 
    if ($_xml === null) 
	{ 
        $_xml = new SimpleXMLElement($rootElement !== null ? $rootElement : '<root/>'); 
    } 
      
    foreach ($array as $k => $v) 
	{ 
        if (is_array($v)) 
		{  
            array2Xml($v, $k, $_xml->addChild($k)); 
        } 
        else 
		{ 
            $_xml->addChild($k, $v); 
        } 
    } 
    return $_xml->asXML(); 
}