There's a market for all three. Personally, I'd advise you to look at a few code examples, and pick the one that 'looks' best.

If you need to, have a quick glance at a few tutorials, and decide which one you like best.

You can't misfire all that much.

(Though, I would advise against PHP, but that's just my personal hatred towards the php language and its interpreter, and is a very subjective opinion)