htaccess to remove html and php code example

Example 1: htaccess remove .html

#remove html file extension-e.g. https://example.com/file.html will become https://example.com/file
RewriteEngine on 
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.html -f
RewriteRule ^(.*)$ $1.html [NC,L]

Example 2: rewrite .php to no extension

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([^\.]+)$ $1.php [NC,L]