Which type of format is this in laravel api?

This format is called JSON, it's the most common format when working with apis.

If you want to see the data structured, you can use https://jsoneditoronline.org/ for example.

@MANELGAVALDA - But what do we call this (Please view on online json viewer to view my data) { "success": "0", "post": { "username": [ "The username has already been taken." ], "email": [ "The email has already been taken." ] } }

and this one:

{ "success": "1", "post": { "user_id": 35783, "name": "vicky", "email": "[email protected]", "phone": "7678278765", "token": "5652432d00bdb28357fb71540a23e704a45a90076815bf9801" } }

i want to know exactly array or object or what is it

@RAVIAWASTI - They are surrended with curly braces {}, so they are both JSON objects https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Objects/JSON.

A JSON object can have nested JSON objects inside, that's why you have more {} inside.

And in the first case this JSON object has 2 arrays of 1 item inside:

[ "The username has already been taken." ] // First array
[ "The email has already been taken." ] // Second array

while using validation in controller

$data = $request->all();

   $validator = Validator::make($data, [
       'username' => 'required|numeric|digits:10|unique:users',
    'name' => 'required|max:80|regex:/^[\pL\s\-]+$/u',
    'email' => 'required|email|max:60|unique:users',
    ]);

   
  if ($validator->fails())
  {
  return response()->json(['success'=>'0','post'=>$validator->errors()]);
  }

i am getting data like this(i want to remove [ ] from first one)

{ "success": "0", "post": { "username": [ "The username has already been taken." ], "email": [ "The email has already been taken." ] } }

but i want in this format

{ "success": "0", "post": { "username": "The username has already been taken", "email": "The email has already been taken." } }