I started using Python about 5 years ago, but still used PHP for my main dev for a couple of years. PHP gradually got more and more painful to go back to, though, the more Python I wrote, and eventually I ditched PHP for all but mostly-static 3-page sites. I'm a fulltime web programmer, and we now do all our work in Django.<p>(That said, I'm using more and more Clojure for my personal stuff.)