Nginx泛解析的匹配域名绑定到子目录配置

网站的目录结构为：

# tree /home/wwwroot/75271.com
/home/wwwroot/75271.com
├── bbs
│ └── index.html
└── www
└── index.html

2 directories, 2 files
/home/wwwroot/75271.com为nginx的安装目录下默认的存放源代码的路径。
bbs为论坛程序源代码路径；www为主页程序源代码路径；把相应程序放入上面的路径通过；http://www.75271.com 访问的就是主页http://bbs.75271.com 访问的就是论坛，其它二级域名类推。
有2种方法，推荐方法一
方法一：

server {
listen 80;
server_name ~^(?.+).75271.com$;
access_log /data/wwwlogs/75271.com_nginx.log combined;
index index.html index.htm index.php;
root /home/wwwroot/linuxeye/$subdomain/;
location ~ .php$ {
    fastcgi_pass unix:/dev/shm/php-cgi.sock;
    fastcgi_index index.php;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    include fastcgi_params;
    }
location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|flv|ico)$ {
    expires 30d;
    }
location ~ .*\.(js|css)?$ {
    expires 7d;
    }
}

方法二：

server {
listen 80;
server_name *.75271.com;
access_log /home/wwwlogs/75271.com_nginx.log combined;
index index.html index.htm index.php;
if ($host ~* ^([^\.]+)\.([^\.]+\.[^\.]+)$) {
    set $subdomain $1;
    set $domain $2;
}
location / {
    root /home/wwwroot/75271.com/$subdomain/;
    index index.php index.html index.htm;
}
location ~ .php$ {
    fastcgi_pass unix:/dev/shm/php-cgi.sock;
    fastcgi_index index.php;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    include fastcgi_params;
    }
location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|flv|ico)$ {
    expires 30d;
    }
location ~ .*\.(js|css)?$ {
    expires 7d;
    }
}