Heroku’s PHP support beta now allows the explicit declaration of both
php as dependencies in
During a deploy, only the requested runtime(s) will be installed, so if you require regular PHP in addition to HHVM for any reason, make sure it’s specified appropriately.
If HHVM is declared as a dependency, Composer installs will be executed using HHVM to satisfy the dependency requirement. HHVM identifies itself as PHP version “5.5.99” when queried using
phpversion() or in