server

{

 listen       ;

 server_name xxx;

 ....if (!-e $request_filename) {

                 rewrite ^/(.*)$ /index.php/$1 last;

  }

  location ~ \.php {

                set $real_script_name $fastcgi_script_name;

                set $path_info "";

                include        fastcgi_params;

                if ($fastcgi_script_name ~ "^(.+?\.php)(/.+)$") {

                           set $real_script_name $1;

                           set $path_info $2;

                }

               ...

                fastcgi_param PATH_INFO $path_info;

                fastcgi_param SCRIPT_NAME $real_script_name;

  }

}