public static function FormatRequestData(array $data, $outputType) { $requestData = ""; switch ($outputType) { case "xml": $requestData = urlencode('<?xml version="1.0" encoding="UTF-8"?><request>' . XmlHelper::array2xml($data) . '</request>'); break; case "json": $requestData = json_encode($data); break; } return $requestData; }