New Programming Language – Recommendations and Why?

Hey Everyone,
I am considering learning a new programming language. However I am not sure if this is what I want to do right now. Is it smarter to learn a new one? Or strengthen and focus on PHP even more?

I welcome all thoughts and comments.

Here are my considerations:

  • Strengthen my PHP Skills, and OOP Skills
  • Perl
  • Python
  • Ruby
  • Grails (Groovy on Grails?)