example_nginx_config_wpmulsite.conf

map $uri $blogname{
    ~^(?P<blogpath>/[^/]+/)files/(.*)   $blogpath ;
}

map $blogname $blogid{
    default -999;

    #Ref: http://wordpress.org/extend/plugins/nginx-helper/
    #include /var/www/wordpress/wp-content/plugins/nginx-helper/map.conf ;
}

server {
    listen 80;
    server_name example.com ;

    root /var/www/vhosts/example.com/html;
    index index.php;

    location ~ ^(/[^/]+/)?files/(.+) {
        try_files /wp-content/blogs.dir/$blogid/files/$2 /wp-includes/ms-files.php?file=$2 ;
        access_log off; log_not_found off; expires max;
    }

    #avoid php readfile()
    location ^~ /blogs.dir {
        internal;
        alias /var/www/vhosts/example.com/html/content/uploads ;
        access_log off; log_not_found off; expires max;
    }

    if (!-e $request_filename) {
        rewrite /wp-admin$ $scheme://$host$uri/ permanent;
        rewrite ^(/[^/]+)?(/wp-.*) $2 last;
        rewrite ^(/[^/]+)?(/.*\.php) $2 last;
    }

    location / {
        try_files $uri $uri/ /index.php?$args ;
        index index.php;
    }

    location ~ \.php$ {
            try_files $uri =404;
            fastcgi_split_path_info ^(.+\.php)(/.+)$;
            fastcgi_pass unix:/tmp/php5-fpm.sock;
            fastcgi_index index.php;
            include fastcgi_params;
    }


    #add some rules for static content expiry-headers here
}

Hello
Would you like to tell me how to set up nginx conf of ​multisite in WordPress installed in the subdirectory of domain using Nginx?