May 2018 PHP runtime and extensions updates

Change effective on 24 May 2018

The following new runtime versions are now available for PHP applications:

  • PHP 7.1.18
  • PHP 7.2.6

The following PHP extensions have been added or updated:

  • ext-blackfire, version 1.20.0
  • ext-newrelic, version

The version of Composer that is used during builds and available at runtime is now 1.6.5.

An issue has been fixed that could cause PHP-FPM to crash on the heroku-18 stack.

The default runtime on the heroku-18 stack is now PHP 7.