PHP Google Json styleguide

<?php

// Whenever you have a successful operation, either having a response object, or just empty response
// Call this function, and pass your collection array, or single object into this function.

function success($entity)
{
  if (is_array($entity)) {
    $content = [
      'data' => [
        'items' => $entity
      ]
    ];
  }

  if (is_object($entity)) {
    $data = $entity;

    $data->fields = join(array_keys(get_object_vars($data)), ',');

    $content = [
      'data' => $data
    ];
  }

  return json_encode($content, JSON_PRETTY_PRINT);
}

// Failure result, including business errors, server errors should be called by this function
// with a different status code (if it's internal error aka.)
function failure($code, $errors = [], $httpStatus = 200)
{

  $errors = array_map(function ($item) {

    // Do translations here, for each message field if you want, or send for front-end
    if (isset($item['message']) && $item['message']) {
      return $item;
    }
  }, $errors);

  $content = [
    'error' => [
      'code' => $code,
      'message' => $code, // Do some translations function if you have, to convert code to message
      'errors' => $errors
    ]
  ];

  return json_encode($content, JSON_PRETTY_PRINT);
}


$user = (object) ['first_name' => 'Ali', 'last_name' => 'Torabi'];

echo "\r\nSample success for list of items \r\n";
echo success([['name' => 'ali']]);

echo "\r\nSample success only a single item \r\n";
echo success($user);

echo "\r\nFailure with error code \r\n";
echo failure('ERROR_FIELD', [['location'=> 'email', 'message' => 'EMAIL_IS_NOT_CORRECT']]);


--- results:

Sample success for list of items 


{
    "data": {
        "items": [
            {
                "name": "ali"
            }
        ]
    }
}


Sample success only a single item 


{
    "data": {
        "first_name": "Ali",
        "last_name": "Torabi",
        "fields": "first_name,last_name"
    }
}


Failure with error code 


{
    "error": {
        "code": "ERROR_FIELD",
        "message": "ERROR_FIELD",
        "errors": [
            {
                "location": "email",
                "message": "EMAIL_IS_NOT_CORRECT"
            }
        ]
    }
}