How to correctly force SSL on WordPress via wp-config.php?

If I edit the wp-config.php I am supposed to add:

define('FORCE_SSL_ADMIN', true);define('FORCE_SSL_LOGIN', true);

However, my website has .htaccess rules to force https and www across the entire website:

Options +FollowSymlinksRewriteEngine OnRewriteCond %{SERVER_PORT} 80 [OR]RewriteCond %{HTTP_HOST} ^website.comRewriteRule ^(.*)$ https://www.website.com/$1 [L,R=301]

I know there are other rewriterules available, but again not sure which one is correct.

Which of the following 3 should I be using in wp-config.php

1. Without isset(), with curly brackets, with server_port

   if ($_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https') {    $_SERVER['HTTPS'] = 'on';    $_SERVER['SERVER_PORT'] = 443;}

2. Without curly brackets & without server_port?

   if (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')    $_SERVER['HTTPS'] = 'on';

3. Are curly brackets needed/better or "more correct" & is server_port required?

   if (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https') {    $_SERVER['HTTPS'] = 'on';    $_SERVER['SERVER_PORT'] = 443;}

I've found a few other slightly different variations of this all over the internet regarding wordpress SSL but I can't figure out what one is the correct/main one.