Redirect HTTP to HTTPS from .htaccess

.htaccess

# .htaccess redirects can vary depending on server caching, reverse proxies and CDNs
# Try these RewriteConditions in order, starting from the top and stepping down
# until one works. Only enable one RewriteConds at a time.

RewriteEngine On

# 1. Try this first
RewriteCond %{HTTPS} off

# 2. Docs suggest on|off should work, but try this anyway
# RewriteCond %{HTTPS} !on

# 3. Try port sniffing instead?
# RewriteCond %{SERVER_PORT} !=443
# RewriteCond %{SERVER_PORT} 80

# 4. If the above doesn't work, this might (why?)
#    Known to work on LiquidWeb's Cloud sites
# RewriteCond %{ENV:HTTPS} !on

# 5. Cloudflare and maybe other CDNs
# RewriteCond %{HTTP:X-Forwarded-Proto} =http

RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]