HHVM 4.128 is released! This release has long term support, so:

  • this release will be supported for approximately 48 weeks
  • the next LTS will be released in approximately 24 weeks
  • HHVM 4.102 (LTS) and HHVM 4.123–127 remain supported
  • support has ended for 4.80 (LTS) and 4.122


  • Compatible editors (e.g. Visual Studio Code) will now suggest fixes for some type errors, such as undefined variable names that appear to be typoes.
  • hackfmt -i (or --in-place) now accepts multiple filenames in one invocation.

Breaking Changes

  • newctx now requires an as constraint.