nginx for CodeIgniter rewrite

codeigniter_rewrite_for_nginx

server {
    listen       80;
    server_name  mrkt.com;

    access_log  /var/www/html/logs/mrkt.access.log  main;
    error_log /var/www/html/logs/mrkt.error.log;

    location / {
        root   /var/www/html/mrkt;
        index  index.html index.htm index.php;
        if (-f $request_filename) {
            expires 30d;
            break;
        }
        if (!-e $request_filename) {
            rewrite ^(.+)$ /index.php?$1 last;
            break;
        }   
    }
    location ~ \.php$ {
        root /var/www/html/mrkt;
        fastcgi_pass   127.0.0.1:9000;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
        include        fastcgi_params;
    }

}