$rest_obj = new RestService("web service URL", 'param1', 'param2');
    $rest_obj->requestName = 'webservice controller name';
    $rest_obj->requestData = '';
    $rest_obj->querydata = $data['request_params'];
    $rest_obj->requestType = "html";
    $rest_obj->responseType = "json";
    $rest_obj->getData();
    $fields_array = $rest_obj->response;