Comment by interwho

Personally, I'd go with PHP.

Why?

- It's easy to get things done fast.

- There are plenty of classes available online that'll make things even easier.

- It's easier to maintain (IMHO) than some other languages.

- It'll run on almost all web hosting services cheaply.

- It's scaleable.

If and when you need something more powerful, a seamless transition can be made over to another language.