It all comes down to what your goals are... do you want to create a SaaS? do you want to build large distributed systems? do you want to code an embedded OS? do you want to get a job building internal/external web sites for a large company?

You would be better off focusing on what you are trying to accomplish and talk to people in the field and then asking them what tools they use and if they could redo it from the beginning, what would they have done differently?

Also, some of the choices of your career have the toolset determined already... if you want to get a job at an insurance company that uses PHP, then PHP is the main thing you should focus on for now.

Also, languages are just tools to add to your toolbelt. Having many notches on your toolbelt always fun and cool, but doesn't always help you with your career.