I started on PHP, then I discovered Ruby and later Python. If you call yourself a programmer, go out and try these other server languages so you have a better perspective.
I love PHP: it is my first love, but it is far from 'the best' language. If you love PHP you will absolutely love these other languages they got going
Code School - TryRuby
Don't take this as offensive. I would have just appreciated if, when I thought PHP was the only language, someone urged me to checkout these other great languages.