实战Nginx与PHP（FastCGI）的安装、配置与优化:http://ixdba.blog.51cto.com/2895551/806622
Nginx配置文件详细说明:http://www.cnblogs.com/xiaogangqq123/archive/2011/03/02/1969006.html
由于做测试用，所以通过修改hosts文件来达到对浏览器输入不同网址输出不同地址....(语言表达不强，自己能理解）
hosts文件配置，将域名转接
127.0.0.1 localhost
139.217.2.21 www.qq.com
139.217.2.21 www.baidu.com
139.217.2.21 www.sina.com.cn
修改nginx的配置文件,给这三个网址分别加入一个server，如下写三遍，修改其中一些参数即可
server {
listen 80;
server_name qq.com www.qq.com;
root /var/www/site1;
index index.php index.html index.htm;
location / {
if (!-e $request_filename){
rewrite ^(.*)$ /index.php?s=$1 last;
break;
}
}
location ~* .php$ {
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_index index.php;
include fastcgi_params;
set $path_info "" ;
set $real_script_name $fastcgi_script_name;
if ($fastcgi_script_name ~ "^(.+?.php)(/.+)$" ){
set $real_script_name $1;
set $path_info $2;
}
fastcgi_param SCRIPT_FILENAME $document_root$real_script_name;
fastcgi_param SCRIPT_NAME $real_script_name;
fastcgi_param PATH_INFO $path_info;
}
}