No Nextcloud + data + it’s configuration works independent from PHP. If you anyway worry about something of nextcloud could break, just put it into occ maintenance:mode --on
to prevent any manipulation in between.
EDIT
AHHH!! Sorry you told in OT that you use PHP5. Sorry I mixed it up with the other topic. So Nextcloud should not show you something different of course.
In this case some folders and commands change slightly.
- the relates APCu package might be apt install php5-apcu or php5-apc.
- The php config folder is /etc/php5/apache2 respectively mods-available.
- The command to enable the module (create the symlink) is php5enmod.
So the 5 appears everywhere .