for example, the following configuration block. I have N PHP sites, and they all have the same configuration items except server_name and root. Is there any way to reuse the same configuration?

by the way, is there a security risk to my next configuration item? If so, how do I modify it?

Thank you very much! ^ _ ^

server {
    listen 80 default_server;
    listen [::]:80 default_server;
    
    root /var/www/html;
    
    -sharp Add index.php to the list if you are using PHP
    index index.php index.html index.htm index.nginx-debian.html;
    
    server_name www.xxx.com;
    
    location / {
            -sharp First attempt to serve request as file, then
            -sharp as directory, then fall back to displaying a 404.
            try_files $uri $uri/ =404;
    }       
    
    location ~ \.php$ {
            include snippets/fastcgi-php.conf;
            fastcgi_pass unix:/run/php/php7.0-fpm.sock;
    }       
    
    location ~ /\.ht {
        deny all;
    }
}