Adding tools to your toolbelt is part of the craft, no? You can add another language to your roster without abandoning PHP. I used to write PHP, and will write

Adding tools to your toolbelt is part of the craft, no? You can add another language to your roster without abandoning PHP. I used to write PHP, and will write it happily after a refresher if I need to. However, I learnt ton of languages after I learnt PHP. That shouldn't be an issue. On your question, PHP is alive because of the same reasons why FORTRAN and even COBOL alive. It's useful.