break;
        case "service_INS":
            $validate = new validate();
            $data = $validate->services_ins();
            $function = new functions();
            $data = $function->service_INS($mysqli);
            break;
        case "category_SEL":
            $validate = new validate();
            $data = $validate->category_sel();
            $function = new functions();
            $data = $function->category_SEL($mysqli);
            break;
        case "category_INS":
            $validate = new validate();
            $data = $validate->category_ins();
            $function = new functions();
            $data = $function->category_INS($mysqli);
            break;
        default:
            break;
    }
} else {
    http_response_code(200);
    $data['status'] = "error";
    $data['success'] = false;
    $data['message'] = "No method specified";
}
// let's send the data back
header("Content-Type: application/json");
echo json_encode($data);