I tried to get the php apcu module enabled on the Raspbian Buster for a nextcloud installation but got stuck.
I think the issue goes back to having two php versions in Raspbian Buster:
On Buster php 7.2 and 7.3 are installed by default. Installing apcu with 'apt install php-apcu' works fine as such, but installs apcu as part of 7.3 (i.e. it can be found at '/var/lib/php/modules/7.3/'). apache2 itself is running with 7.2 though on Raspbian Buster. I also tried to change to 7.3 but that failed with an error message (with 'a2dismod php7.2' and 'a2enmod php7.3'). There is also no way I'm aware of to install php-apcu for 7.2 explicitly (with e.g. 'apt install php7.2-apcu').
Does anyone have similar issues; I'm I doing something completely wrong? Any ideas or comments how to enable apcu are more than welcome.