What conditional to use for dynamic sidebar check?

dynamic_sidebar() produces sidebar output. So case by case:

  1. Checking if sidebar is active is pointless because otherwise it would just do nothing anyway. This check is useful if you need to perform it elsewhere for something different and/or more extensive than just calling it.

  2. Calling it just works. << so this is what you want

  3. I am not sure what this is supposed to be, but it is rather pointless. If it works in first half then second half is not called. If it doesn’t work in first half second half won’t do anything either.