Here I will explain how to install PHP 7.3 on Debian Buster. If you to want to install another version of PHP, you only should change in all places where PHP 7.3 it is, for the version you to want to install. I will also explain how to install apache2.
In July 2019 Debian has the new version public to does, his name is Debian 10 Buster, it will receive support over the next five years. I will explain here with this Tutorial how Install Debian 10 Buster with Mate with Nvidia, but it is working similarly with all Desktop's (Gnome, Kde, Lxde, Lxqt, Xfce, Cinnamon, Debian and Mate).
With this Tutorial will you learn how Install Debian 9 Stretch with Nvidia. Debian has several ISOs for installation, here speak only Two. I will only speak here how to install Debian Stretch with Hybrid Image File.