How to make it so that when a user registers, a subdomain is created?

Question

Domain name market

Those. let's say I have a registration form on the site, I want that, when registering an account, the account is linked to its subdomain, on which it would already work and the service would work and the user would perform all the actions he needs. How to implement such a system, the PHP + JS technology stack, and hosting has cPanel.
The idea is that the structure: domain.com/users/username1 needs to be converted to username1.domain.com

Answer 1

In the DNS records of the domain, add an A record with the name "@" and specify your ip - after that, requests for all subdomains will go to your ip
On your side, parse HTTP_HOST or redirect through .htaccess