how to make custom validator in laravel
generate a new rule object, by using the make:rule Artisan command.
Let's use this command to generate a rule that verifies a string is
uppercase. Laravel will place the new rule in the app/Rules directory.
If this directory does not exist, Laravel will create it when you
execute the Artisan command to create your rule:
php artisan make:rule Uppercase
go to https://laravel.com/docs/8.x/validation#custom-validation-rules
for details