Devops: Upgrade to PHP 7.4 - maple-dev-team/docs GitHub Wiki
$ sudo apt-get update
$ sudo apt -y install software-properties-common
$ sudo add-apt-repository ppa:ondrej/php
$ sudo apt-get update
$ sudo apt -y install php7.4
$ sudo apt install php7.4-{bcmath,xml,curl,bz2,intl,gd,mbstring,mysql,zip,pgsql}
$ sudo a2dismod php7.2
$ sudo a2enmod php7.4
$ sudo service apache2 restart