Depending on your requirements you’ll need to redirect your users from domain.com to www.domain.com with a permanent redirect in order to improve your site SEO ranking. We already know how to do it with apache and mod_rewrite, but how do you make it in nginx ? It’s not too hard.

Apache configuration:

#.htaccess
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.domain\.com
RewriteRule (.*) http://www.domain.com$1 [R=301,L]

Nginx configuration:

# /etc/nginx/nginx.conf
if ($http_host !~ "^www\.domain\.com$") {
    rewrite  ^(.*)    http://www.domain.com$1 permanent;
}

You can specify custom php.ini file with spawn-fcgi using this format:

/usr/bin/spawn-fcgi [options] -- /usr/bin/php-cgi \
  -c /etc/php-fastcgi.ini