.htaccess

# <IfModule mod_rewrite.c>
# RewriteEngine on

# RewriteCond %{REQUEST_FILENAME} !-d
# RewriteCond %{REQUEST_FILENAME}.php -f
# RewriteRule ^(.*)$ $1.php [NC,L]
# #RewriteRule ^([a-z]+)\/?$ $1.php [NC]


# RewriteCond %{REQUEST_FILENAME} !-d
# RewriteCond %{REQUEST_FILENAME}.html -f
# RewriteRule ^(.*)$ $1.html
# #RewriteRule ^([a-z]+)\/?$ $1.html [NC]

# RewriteCond %{REQUEST_FILENAME} !-d
# RewriteCond %{REQUEST_FILENAME}.asp -f
# RewriteRule ^(.*)$ $1.asp
# #RewriteRule ^([a-z]+)\/?$ $1.asp [NC]

# </IfModule>
RewriteEngine on

# RewriteCond %{REQUEST_FILENAME} !-d
# RewriteCond %{REQUEST_FILENAME}.php -f
# RewriteRule ^(.*)$ $1.php [NC,L]

<IfModule mod_rewrite.c>
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.*)$ $1.php [NC,L]
RewriteRule ^([a-z]+)\/?$ $1.php [NC]
</IfModule>