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Facebook does not "normal" PHP that much, they use host of languages, including Hack, erlang and lots of Python.

• jackweirdy 9y ago
  Right. That's why I said "Started With".
• urethrafranklin 9y ago
  Most of their code is Hack, and Hack is a superset of PHP (last time I checked all it really adds is static typing and async) https://news.ycombinator.com/item?id=14659729 https://news.ycombinator.com/item?id=14659729
  • ergo14 9y ago
    > all it really adds is static typing and async You make that sound like its not a big deal vs vanilla php.
    • urethrafranklin 9y ago
      It's really not. All the sadness and broken-ness of PHP is still there.
      • ADefenestrator 9y ago
        A lot broken-ness is still left for the sake of compatibility (especially since HHVM's open-source), but Collections and type hinting make a huge difference.