How to install PHP 7.x as PHP-FPM & FastCGI for ISPConfig 3.1 with apt on Debian 8 and 9

This tutorial shows how to install PHP 7.x as a PHP-FPM and a FastCGI version on a Debian Jessie or Stretch server from the Debian PHP Package maintainers site directly.

Read more: How to install PHP 7.x as PHP-FPM & FastCGI for ISPConfig 3.1 with apt on Debian 8 and 9