Topic: Hide .php Extentions in .htaccess
I want to add several independent .php pages to the root folder of my MONSTRA CMS Installation with the file extension to be removed on the file e.g.
www.domain.com/page.php = www.domain.com/page
and
www.domain.com/subfolder/page.php = www.domain.com/subfolder/page
So if someone types in: www.domain.com/page.php they are redirected to: www.domain.com/page
I have included in the root .htaccess some apache rewrite rules, but I think these rules conflict with the original rules in the Monstra .htaccess file because i get the following results:
www.domain.com/page works

www.domain.com/page.php DOES NOT REDIRECT TO www.domain.com/page

if you add a trailing slash: www.domain.com/page/ i get a 500 internal server error response.

I would also like the trailing slash (www.domain.com/page/) to be redirected to (www.domain.com/page)
I am struggling to get my head around to understanding apache .htaccess, as I am newby to anything web development related and just starting to get my hands dirty...
If someone could help me by providing the correct .htaccess adapted from on MONSTRA .htaccess I would be really grateful.
Below is the code I used in my .htaccess file:
#
# Monstra CMS :: php & apache settings
#
# Set default charset utf-8
AddDefaultCharset UTF-8
# Don't show directory listings for URLs which map to a directory.
Options -Indexes
# PHP 5, Apache 1 and 2.
<IfModule mod_php5.c>
php_flag magic_quotes_gpc off
php_flag magic_quotes_sybase off
php_flag register_globals off
</IfModule>
Options +FollowSymLinks -MultiViews
# Turn mod_rewrite on
RewriteEngine On
## hide .php or .html extension
# To externally redirect foo.php ot foo.html to foo
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s([^.]+)\.(php|html) [NC]
RewriteRule ^ %1 [R,L,NC]
RewriteCond %{REQUEST_FILENAME}.html -f
RewriteRule ^ %{REQUEST_URI}.html [L]
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^ %{REQUEST_URI}.php [L]
# Setting rewrite rules.
<IfModule mod_rewrite.c>
RewriteEngine on
# Update code bellow for SEO improvements
# RewriteCond %{HTTP_HOST} ^www.example.org [NC]
# RewriteRule ^(.*)$ http://example.org/$1 [R=301,L]
RewriteBase /mydomain.com/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php [QSA,L]
# Update code bellow for SEO improvements
# Redirect 301 /home http://example.org/
</IfModule>