<?php use Illuminate\Http\Request; /* |-------------------------------------------------------------------------- | API Routes |-------------------------------------------------------------------------- | | Here is where you can register API routes for your application. These | routes are loaded by the RouteServiceProvider within a group which | is assigned the "api" middleware group. Enjoy building your API! | */ Route::post('user', function(Request $request) { $request->validate([ 'age' => [ 'required', function($attribute, $value, $fail) { if($value < 60) { $fail($attribute.' must be 60 or above'); } } ], ]); return response('Success', 200); });