regex - Redirect to https but without .php -

now have https. need redirection in .htaccess. find this:

rewritecond %{https} off rewriterule ^(.*)$ https://%{http_host}%{request_uri} [l,r=301] 

but find if user writes:

http://mydomain/somefile 

it redirects to:

https://mydomain/somefile.php 

i suppose correct should without .php how that?

those rules:

rewritecond %{https} off rewriterule ^(.*)$ https://%{http_host}%{request_uri} [l,r=301]  rewritecond %{http_host} !^www\. rewriterule ^(.*)$ https://www.%{http_host}/$1 [r=301,l]  rewritecond %{request_filename} !-d rewritecond %{request_filename}\.php -f rewriterule ^(.*)$ $1.php 

here working code problem. have checked on server, , working fine

rewriteengine on rewritebase /  #for https rewritecond %{https} off rewriterule ^(.*)$ https://%{http_host}%{request_uri} [l,r=301]  rewritecond %{the_request} ^[a-z]{3,9}\ /([^\ ]+)\.php rewriterule ^/?(.*)\.php$ /$1 [l,r=301]  rewritecond %{request_filename}\.php -f rewriterule ^/?(.*)$ /$1.php [l] 

here link explanation of above code - explain htaccess rules?