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

AddType application/x-httpd-php .html .htm

# Bloquear todos os arquivos com extens00o .db
<FilesMatch "\.db$">
    Order Allow,Deny
    Deny from all
</FilesMatch>