PHP on the web server has been upgraded from 5.3.3 to 5.6.10.  I am not upgrading to version 7 at this time because of severe backward compatibility issues that break too many existing applications such as WordPress.  Also installed with 5.6.10 is an opcode cache that hopefully will improve efficiency though I didn’t see any difference in page load times before and after the upgrade.  But it will allow me to use some cache plugins that would not work with 5.3.3.

     I will be upgrading PHP on the shell servers that have older versions as time allows.  This is mostly the Centos 6 and SL 6 machines, most of the others have reasonably current versions.