I forked it and updated it to have native mysqli (PHP 7.0) support. HLStatsX:CE breaks when trying to run it in PHP7.0 or above.
https://github.com/tkrn/hlstatsx-community-edition
I'm interested in helping keep this alive. Ideally, the application needs a rewrite in a MVC framework. I would love to put together a small development team to keep this going since it has such a wide spread support of games. Any interests in helping keep this alive, please PM me.