How to set up a virtual host in Apache in a special way?

Question

Apache HTTP Server

Folks, I just made a new server, I set up phpmyadmin, but not through the installation (there are always problems with it), but simply by creating a directory inside /var/www/phpmyadmin, there is also a directory of the main site /var/www/mainsite.ru, I wanted to I would like phpmyadmin to work as a subdomain, like this http://phpmyadmin.mainsite.ru, but the domain cannot be transferred at the moment, there is only an ip-address. How to make the site work while in this mode - http://phpmyadmin.ip-address?

Answer 1

so that the site works in this mode so far - http://phpmyadmin.ip-address?

no way!
ps and what's stopping you from temporarily registering some domain inhosts