Nginx Configuration for Codeigniter

nginx.conf

server {
    listen       80 default_server;
    server_name  dev.example.com;
    
    location / {
        root /usr/share/nginx/html;
        index index.php index.html;
    }
    
    location /exampleci/ {
        root   /usr/share/nginx/html/exampleci;
        index  index.php;
        
        if (-f $request_filename) {
            expires 30d;
            break;
        }
        
        if (!-e $request_filename) {
            rewrite ^(.+)$ /exampleci/index.php?$1 last;
        }
        
    }

    location ~* ^.+.(jpg|jpeg|gif|css|png|js|ico|xml)$ {
        access_log        off;
        expires           30d;
        root /usr/share/nginx/html/;
    }
    
    error_page  404              /404.html;
    location = /404.html {
        root   /usr/share/nginx/html;
    }
    
    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }
    
    location ~ \.php$ {
        fastcgi_pass   127.0.0.1:9000;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
        include        fastcgi_params;
    }
    
    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    location ~ /\.ht {
        deny  all;
    }
}