Install PHP 7.3 / PHP 7.3-FPM With Apache2

Step 1: Setup PHP with Apache2 HTTP Server

sudo apt update
sudo apt install apache2
sudo systemctl stop apache2.service
sudo systemctl start apache2.service
sudo systemctl enable apache2.service

Step 2: Install PHP 7.3 with Apache2 Support

sudo apt-get install software-properties-common
sudo add-apt-repository ppa:ondrej/php
sudo apt update

sudo apt-get install php7.3 libapache2-mod-php7.3 php7.3-cli php7.3-mysql php7.3-gd php7.3-imagick php7.3-recode php7.3-tidy php7.3-xmlrpc

Step 3: Configure PHP 7.3 for Apache2

sudo nano /etc/php/7.3/apache2/php.ini

file_uploads = On
allow_url_fopen = On
memory_limit = 256M
upload_max_filesize = 100M
max_execution_time = 360
date.timezone = America/Chicago

sudo systemctl restart apache2.service