minimum Age validation laravel

Question

I want to validation a users information like date of birth for that i have used following line of statement in validation, But how do i make it dynamic so users minimum age could be 13. below that can't register?

  return Validator::make($data, [
            'first_name' => 'required|string|max:255',
            'last_name' => 'required|string|max:255',
            'email' => 'required|string|email|max:255|unique:users',
            'password' => 'required|string|min:6',
            'date_of_birth' =>'required|date|before:2011-06-08',
        ]);

Answer 1

According to the docs at https://laravel.com/docs/5.5/validation, you should be able to use any valid string that works with the strtotime() function. In this case strtotime('13 years ago') is a valid descriptor for the dynamic date you are after. Hence, the following should work:

return Validator::make($data, [
    'first_name' => 'required|string|max:255',
    'last_name' => 'required|string|max:255',
    'email' => 'required|string|email|max:255|unique:users',
    'password' => 'required|string|min:6',
    'date_of_birth' =>'required|date|before:13 years ago',
]);