HHVM 4.113 is released! This release marks the end of support for 4.107; HHVM 4.108–4.112 remain supported, as do the 4.80 and 4.102 LTS releases.


  • Packages for Ubuntu 21.04 (Hirsute Hippo) are now available.

Breaking Changes

  • Fixed a bug where the typechecker would sometimes incorrectly infer the type of a value when dealing with arraykey and num-typed values. This may reveal some previously undetected errors.
  • The INI option hhvm.server.allow_duplicate_cookies was removed.

Slack Group

If you are interested in HHVM, you’re welcome to join our Slack group.

This replaces our IRC channel, which has been inactive for a long time.