现在使用的nginx，这里以版本为1.10.3的nginx为例，现在增加了try_files语法，比原来的rewrite路由的方式更加高效。

CI框架使用MVC框架，框架需要单一入口来处理请求，对于不存在的文件要做一下重新路由的功能，这是必需的。

为了支持CodeIgniter框架， linux的  nginx 增加了一项配置，如下：

server {  
        listen 8000 default_server;  
        server_name newcar.site;
        root /var/www/newcar;
        index index.php index.html index.htm;   

        location / {  
            try_files $uri $uri/ /index.php;  
        }  
        location ~ \.php$ {  
            include snippets/fastcgi-php.conf;
            include fastcgi_params;
            fastcgi_pass   unix:/var/run/php/php7.0-fpm.sock;  
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            fastcgi_param  PATH_INFO $fastcgi_path_info;
            fastcgi_split_path_info ^(.+\.php)(.*)$;
            fastcgi_param PATH_TRANSLATED $document_root$fastcgi_path_info;
        
        }  
    }

其中标黄的部分表示的意思其实就是rewrite机制，如果请求的文件不存在而且文件夹也不存在时，才会跳转到/index.php页面

Windows下nginx的配置：

server {
        listen       80;
        server_name  newcar.xin.com ;
        root   "D:/phpStudy/WWW/x.xin.com";
		index  index.html index.htm index.php;
        location / {            
            try_files $uri $uri/ /index.php;
        }
        location ~ \.php(.*)$ {
			include uxin-conf.d/www_newcar.conf;
            include        fastcgi_params;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            fastcgi_split_path_info  ^((?U).+\.php)(/?.+)$;
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            fastcgi_param  PATH_INFO  $fastcgi_path_info;
            fastcgi_param  PATH_TRANSLATED  $document_root$fastcgi_path_info;	
			
        }
		
}