htaccess Redirect Wildcard Subdomains to https (Including www)

Question

Currently my htaccess file redirects non-https requests for all of my subdomains to https... except for www requests. Ie http://subdomain.example.com gets redirected to https://subdomain.example.com (this is correct) but www.subdomain.example.com get redirected to https://www.subdomain.example.com (not correct). Here's my .htaccess code:

<IfModule mod_rewrite.c>
    <IfModule mod_negotiation.c>
        Options -MultiViews
    </IfModule>

    RewriteEngine On

    # Redirect Trailing Slashes...
    RewriteRule ^(.*)/$ /$1 [L,R=301]

    # Trying to redirect to https
    RewriteCond %{HTTPS} off
    RewriteCond %{SERVER_PORT} !=443
    RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,NE,R=301]

    # Handle Front Controller...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteRule ^ index.php [L]

</IfModule>

Answer 1

Try changing this:

RewriteCond %{HTTPS} off
RewriteCond %{SERVER_PORT} !=443
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,NE,R=301]

to

RewriteCond %{HTTPS} off
RewriteCond %{SERVER_PORT} !=443
RewriteCond %{HTTP_HOST} ^(?:www\.|)(.+\.example\.com)$ [NC]
RewriteRule ^ https://%1%{REQUEST_URI} [L,NE,R=301]