You can get $5 shared webhosting anywhere and use php. Or apt-get the php Apache module and be ready.
The barrier to entry is very very low (for better or worse), and if you're careful and avoid most of the crazy, you can make really fast , low overhead, lightly dynamic pages. Of course, it also gives you more than enough rope to get yourself into a lot of trouble, and I have feelings about the modern trend of obfuscating things with frameworks and autoloads, but lots of people think they're great.
The barrier to entry is very very low (for better or worse), and if you're careful and avoid most of the crazy, you can make really fast , low overhead, lightly dynamic pages. Of course, it also gives you more than enough rope to get yourself into a lot of trouble, and I have feelings about the modern trend of obfuscating things with frameworks and autoloads, but lots of people think they're great.