Oh, it's a question about PHP... Anyway, I either use the one that's official for the language, the one that applies to the project I'm just working on, or the

Oh, it's a question about PHP... Anyway, I either use the one that's official for the language, the one that applies to the project I'm just working on, or the one that seems the most sensible to me. For the latter I normally check a few very popular projects for the language and see what they agree on.