Change effective on 03 August 2017
The following new runtime versions are now available for PHP applications:
The following PHP extensions have been added or updated:
ext-amqp, version 1.9.1
ext-blackfire, version 1.17.3
ext-mongodb, version 1.2.9
ext-newrelic, version 22.214.171.124
ext-phalcon, version 3.2.1
ext-pq, version 2.1.2
ext-rdkafka, version 3.0.3
ext-redis, version 3.1.3
blackfire extensions will no longer be automatically enabled during Heroku CI builds.
An issue has been fixed that prevented applications which use the PHP buildpack as a
require-dev Composer dependency to build on Heroku CI.