/** * get a currency id and exchange rate it by unit library **/ private function update_a_exchange_rate($unit_id, $currency_code) { $res = wpl_units::update_a_exchange_rate($unit_id, $currency_code); $success = $res ? true : false; $response = array('success' => $success, 'res' => $res); echo json_encode($response); exit; }