RewriteEngine On

# 404 Page

ErrorDocument 404 /404.php

# If a file exists as requested, or one can be found
# by appending .php to the query, go there.

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f

RewriteRule !.*\.php$ %{REQUEST_FILENAME}.php [QSA,L]

# If the file does not exist, redirect to page.php

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php !-f

RewriteRule ^(.*)$ page.php?page=$1 [NC,L,QSA]