Change effective on 14 November 2014
New versions of the following runtimes are now available on Heroku:
The HHVM runtime on the Cedar stack has been deprecated, and no further updates will be made for that stack, meaning the latest available version of HHVM on Cedar remains 3.2.0. Support for HHVM will be removed completely from Cedar stack at a future date; this EOL will be announced separately.
Please migrate to the cedar-14 stack for continued access to HHVM.
Other changes in this update:
mongoextension for PHP to version 1.5.8