<?php
// Any controller
public function show($id)
{
  $customer = $this->repository->showCustomerData($id);
  
  return $customer-isEmpty()
    ? json_response(false, 404, "Customer not found")
    : json_response(true, 200, "Customer info", $customer);
}

{
  "status": "true",
  "code": 200,
  "message": "Customer info",
  "data": {
  // customer data
  }
}

{
  "status": "false",
  "code": 404,
  "message": "Customer not found.",
  "data": null
}