www to non-www with removing extensions htaccess - regex

Question

i've removed .php extensions first on my website. then i've forwarded www to non-www version. but there is a problem with that.
my .htaccess file looks like this:
Options +FollowSymLinks -MultiViews
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([^/]+)/$ $1.php
RewriteRule ^([^/]+)/([^/]+)/$ /$1/$2.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !(\.[a-zA-Z0-9]{1,5}|/)$
RewriteRule (.*)$ /$1/ [R=301,L]
RewriteCond %{HTTP_HOST} ^www\.example\.com$ [NC]
RewriteRule ^(.*)$ http://example.com/$1 [R=301,L]
RewriteCond %{HTTP_HOST} ^188\.166\.104\.194
RewriteRule (.*) http://example.com/$1 [R=301,L]
www forwards to non-www with that .htaccess. that is cool. but the problem is with the other files.
i'm now using: http://example.com/contact instead of: http://example.com/contact.php
but when you try to open http://www.example.com/contact that .htaccess forwards me to http://example.com/contact.php/
how do i fix that?
have a nice day!

Answer 1

Change the order of rules and some refactoring:
Options +FollowSymLinks -MultiViews
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^(www\.example\.com|188\.166\.104\.194)$ [NC]
RewriteRule (.*) http://example.com/$1 [R=301,L]
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteCond %{REQUEST_URI} !(\.[a-zA-Z0-9]{1,5}|/)$
RewriteRule (.*)$ /$1/ [R=301,L]
RewriteRule ^([^/]+)/$ $1.php [L]
RewriteRule ^([^/]+)/([^/]+)/$ /$1/$2.php [L]
Make sure to test is after clearing your browser cache.