Since there are a lot of people still wanting to host stats for Joint Operations, I've managed to fix the code base for JOStats so that it works with PHP 5.6+. There were a ton of edits but it's now fully working on PHP 5.6+ so you no longer have to find a host with PHP 5.2 to run stats.
Please make sure you read the Readme-NovaHQ.txt file before you install or upgrade your stats. It has all the information you need to install / upgrade your JOStats. If you need more help, please post in the forums here.
Download JOStats PHP 5.6+