PHP-FPM is a robust FastCGI Process Manager for PHP that has some advanced features useful for heavy-loaded sites. PHP-FPM allows grouping processes into pools, each running under a separate user/group with its own settings. This guide explains how to use PHP-FPM pools to secure multiple websites with Apache on a single CentOS 7 server. For simplicity, this guide assumes you want to set up two websites. But, you can set up as many websites as you want as long as your server has enough resources.......