php-cgi/focal 2:8.3+94+ubuntu20.04.1+deb.sury.org+2 all [upgradable from: 2:7.4+75]
php-cli/focal 2:8.3+94+ubuntu20.04.1+deb.sury.org+2 all [upgradable from: 2:7.4+75]
php-fpm/focal 2:8.3+94+ubuntu20.04.1+deb.sury.org+2 all [upgradable from: 2:7.4+75]
php-gd/focal 2:8.3+94+ubuntu20.04.1+deb.sury.org+2 all [upgradable from: 2:7.4+75]
php-mbstring/focal 2:8.3+94+ubuntu20.04.1+deb.sury.org+2 all [upgradable from: 2:7.4+75]
php-mysql/focal 2:8.3+94+ubuntu20.04.1+deb.sury.org+2 all [upgradable from: 2:7.4+75]
php-xml/focal 2:8.3+94+ubuntu20.04.1+deb.sury.org+2 all [upgradable from: 2:7.4+75]
php-zip/focal 2:8.3+94+ubuntu20.04.1+deb.sury.org+2 all [upgradable from: 2:7.4+75]
Step 1
apt list --upgradable
Step 2
For every package listed:
apt-get remove php-<name>
apt-get install php7.4-<name>
E.g.
apt-get remove php-zip
apt-get install php7.4-zip
apt-get remove php-gd
apt-get install php7.4-gd
apt-get remove php-mbstring
apt-get install php7.4-mbstring
apt-get remove php-xml
apt-get install php7.4-xml
apt-get remove php-cli
apt-get install php7.4-cli
apt-get remove php-mysql
apt-get install php7.4-mysql
apt-get remove php-fpm
apt-get install php7.4-fpm
Step 3
How do I set the default version for PHP CLI installed via APT?
Step 4
apt list --upgradable