How to degrade from phalcon 2.0.13 to phalcon 2.0.10 on Ubuntu 14.04.4 LTS

If you kept phalcon.so somewhere (before doing upgrade/recompile), you can just copy entire binary back to extensions dir and reload server.

This is how I do the upgrades - in any case of problem, I can revert in a 10 sec to old version w/o recompiling.

If you don't have a copy, then just download 2.0.10 from: https://github.com/phalcon/cphalcon/archive/phalcon-v2.0.10.tar.gz and recompile.

Phalcon releases: https://github.com/phalcon/cphalcon/releases