Hello, how is possible to configure properly mod_php into newest ISPConfig with php 7.3. on Debian 10?
mod_php should not be used anymore, it's an outdated PHP mode that does not support proper user separation or in other words, it is insecure on systems that host multiple websites and it's incompatible with HTTP/2. Use php-fpm as PHP mode instead.
You can still activate mod_php mode under System > server config > web in the current ISPConfig version. This option will get removed in the next major ISPConfig release and all sites that use mod_php will get converted to php-fpm.