PHP

how to add an custom error to validater error in laravel

if (request('event') == null) {
    $validator->errors()->add('event', 'Please select an event');
}

laravel custom validation exception

// In the controller
throw IlluminateValidationValidationException::withMessages([
    "one_thing" => ["Validation Message #1"], 
    "another_thing" => ['Validation Message #2']
]);