Common .htaccess, whitelisting, maintenance, protocol redirects, filetype removal

.htaccess

RewriteEngine On
RewriteBase /

## Whitelisting + Maintenance

 # Whitelist IPs to a single page, redirect all else
 RewriteCond %{REMOTE_ADDR} !^000\.000\.000\.000
 RewriteCond %{REMOTE_ADDR} !^000\.000\.000\.000
 RewriteCond %{REQUEST_URI} ^/whitelist-me.php$
 RewriteRule ^(.*)$ https://domain.com [R=307,L]

 # Maintenance page with whitelisting IP and some assets used on the page
 RewriteCond %{REMOTE_ADDR} !^000\.000\.000\.000
 RewriteCond %{REQUEST_URI} !^/maintenance\.php$
 # Allow a specific requ
 RewriteCond %{REQUEST_URI} !^/company-logo.png$ [NC]
 # Allow a series of filetypes
 RewriteCond %{REQUEST_URI} !\.(css|jpe?g?|png|gif|woff|ttf) [NC]
 RewriteRule ^(.*)$ https://www.domain.com/maintenance.php [R=307,L]

## Protocol Redirects
 
 # non-www to www redirect
 RewriteCond %{HTTP_HOST} ^yourdomain.com [NC]
 RewriteRule ^(.*)$ http://www.yourdomain.com/$1 [L,R=301]
 
 # www to non-www redirect
 RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
 RewriteRule ^(.*)$ https://%1/$1 [R=301,L]
 
 # http to https redirect
 RewriteCond %{HTTPS} !=on
 RewriteRule ^/?(.*) https://%{SERVER_NAME}/$1 [R,L]
 
 # https to http redirect
 RewriteCond %{HTTPS} on
 RewriteRule (.*) http://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
 
 #######
 
 # http to https redirect && www to non-www
 RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
 RewriteRule ^(.*)$ https://%1/$1 [R=301,L]
 RewriteCond %{HTTPS} !=on
 RewriteRule ^/?(.*) https://%{SERVER_NAME}/$1 [R,L]
 
 # https to http redirect && www to non-www
 RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
 RewriteRule ^(.*)$ http://%1/$1 [R=301,L]
 RewriteCond %{HTTPS} on
 RewriteRule (.*) http://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

## Removing file extension

 RewriteEngine On
 RewriteBase /
 RewriteCond %{REQUEST_FILENAME} !-d
 RewriteCond %{REQUEST_FILENAME}\.php -f
 RewriteRule ^(.*)$ $1.php