RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !^www.domena.sk$ [NC]
RewriteRule ^(.*)$ http://www.domena.sk/$1 [L,R=301]
RewriteRule ^index.php$ http://www.domena.sk/$1 [L,R=301]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f
RewriteRule ^([^/]+)/$ $1.php [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !(\.[a-zA-Z0-9]{1,5}|/)$
RewriteRule (.*)$ /$1/ [R=301,L]
RewriteRule ^(.*)\.php$ http://www.domena.sk/$1/ [L,R=301]