Answers for "laravel validation required if another field has value"

laravel required if another field has value

'last_name' => 'required_if:another_field,value'

laravel 8 validation required if another field is not null

$request->validate([
  "old_password" =>"nullable",
  "new_password" =>"confirmed|nullable|different:old_password|required_with:old_password",
  "password_confirmation" =>"nullable|required_with:new_password|required_with:old_password"
]);

laravel form validation based on another field value

$validator = Validator::make($request->all(),[
        'program'           => 'required',
        'music_instrument'  => 'required_if:program.*,in:Music'
  ]);