Installing PHP 7.3 on Linux Mint 19
sudo apt install software-properties-common
sudo add-apt-repository ppa:ondrej/php
sudo apt-get update
sudo apt install php7.3 php7.3-common php7.3-opcache php7.3-cli php7.3-gd php7.3-curl php7.3-mysql
hp -v
_https://www.linuxhowto.info/how-to-install-php-on-linux-mint-19/