ubuntu 18.04 upgrade php 7.2 to 7.3 code example

Example 1: ubuntu 16 upgrade php 7.0 to 7.4

sudo apt install -y php7.4-mysqli php7.4-pdo  php7.4-sqlite3 php7.4-ctype php7.4-fileinfo php7.4-zip php7.4-exif

sudo apt-add-repository ppa:ondrej/php