How to configure nginx to configure domain names for each subdirectory in a virtual host?

Question

How to configure nginx to configure domain names for each subdirectory in a virtual host?
The requirement is that two directories, home and admin
, are placed in a virtual host. Home binding home.xx.com
admin binds admin.xx.com
I don’t want to create two virtual hosts.

Answer 1

server {

    listen 80;
    server_name *.xx.com;

    # set a default root
    set $rootdir /home/xx/public_html;

    # try if is a subdomain
    if ($host ~* ^(.+)\.xx\.com$) {
        set $rootdir /home/xx/subdomains/$1;
    }

    root $rootdir;
}