Well, if you don't already know PHP, learn that.

RoR is actually rather simple, and the demand is growing, but PHP is the more superior language. C is also good, but there are subsidiaries of C such as C#, C++, Visual C++, etc. So you would have to choose one to learn.

RoR will be confusing at first, but once you learn the basics, its even easier to code than PHP (or so I've heard).