install.apache

sudo apt-get install apache2 libapache2-mod-php php php-cli php-pear php-db php-mysql mysql-server php-apcu

(on upgrade, don't forget to check for and remove the PHP5 stuff)

- edit /etc/apache2/ports.conf and change:

Listen 80

- to 

Listen 127.0.0.1:80

- and

Listen *:443

- to

Listen 127.0.0.1:443

- enable the userdir and rewrite modules

sudo a2enmod userdir
sudo a2enmod rewrite
sudo a2enmod ssl
sudo a2enmod php7.2

- fix up the php configuration by editing
  /etc/apache2/mods-available/php7.2.conf and commenting out this bit:
#    <IfModule mod_userdir.c>
#        <Directory /home/*/public_html>
#            php_admin_value engine Off
#        </Directory>
#    </IfModule>

sudo service apache2 restart

- for dev machines, you may not want it to start at boot
sudo systemctl disable apache2
sudo systemctl disable mysql

Go through this and apply all settings:

https://www.insecure.ws/linux/apache_ssl.html