aapanel interface doesn't support empty PHP logs, so I searched:
- Open Cron
- Create Cron like this:

- Code:
echo -n "" > /www/server/php/81/var/log/slow.log; echo -n "" > /www/server/php/81/var/log/php-fpm.log; echo -n "" > /www/server/php/80/var/log/slow.log; echo -n "" > /www/server/php/80/var/log/php-fpm.log;
- run it every time you need a clean.
To clean MySQL slow log you can use
echo -n "" > /www/server/data/mysql-slow.log;