Originally Posted by Bowser Koopa

Weird, I know many mainstream startups in the past 3 years who use PHP. MailChimp for one. Not to mention my own startups.

blog.mailchimp.com/ewww-you-use-php



No, Facebook isn't in PHP because Zuck was a PHP programmer. Zuck was also a perl programmer, but Facebook isn't in perl now is it? Despite all that, after the original PHP code was leaked, they completely rewrote the system from the ground up back in the earlier days, before their current scale... They had some and still do of the best programmers in the world working for them, if they wanted to switch to something else they could have.

In fact, they're so dead set on using PHP that they're creating some of the best stuff to come out for PHP, HipHop VM, which is amazing, and more recently better type hinting and that in Hack, their PHP language.