How to redirect all my urls with no extension to end with .php

I originally wanted to have all my urls end with no extension. Unfortunately, I've tried many htaccess codes and I've just about given up.

So now I want to make it so if a person wants to visit a page in my site, but forgets to enter .php, he/she wi开发者_开发技巧ll automatically be redirected to the same url but with the .php

How can this be done? Thanks!

Here are the rules:

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

1. It will check if requested resource is not a existing folder. For example: you requesting http://www.example.com/help. If there is such folder present (/help) the rule will do nothing (priority is given to a folder). If you do not want this behaviour then remove the first line.

2. It will check if there is such .php file before rewriting. For example: you requesting http://www.example.com/aboutus but there is NO aboutus.php file there -- no rewrite will occur.

3. All such requests should be without trailing slash: should be http://www.example.com/aboutus and NOT http://www.example.com/aboutus/

4. The rule will work for URL in subfolders as well: e.g. http://www.example.com/pages/help/aboutus will be rewritten just fine.

5. Because of the above checks the rule will not enter into a rewrite loop (no 500 error on this rule)

6. Query string (page parameters) will be preserved

Options +FollowSymLinks -MultiViews
# Turn mod_rewrite on
RewriteEngine On
RewriteBase /

## hide .php extension
# To externally redirect /dir/foo.php to /dir/foo
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s([^.]+)\.php [NC]
RewriteRule ^ %1 [R,L,NC]

## To internally redirect /dir/foo to /dir/foo.php
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^ %{REQUEST_URI}.php [L]

In response to Sun Love, the code you posted works well except for situations where you have a trailing slash without the file extension (I get a 500 error) because the first RegEx doesn't match for this situation.

example.com/test.html -- works (redirects to /test)

example.com/test -- works (no redirect)

example.com/test.html -- works (redirects to /test)

example.com/test/ -- doesn't work (500 error)

There is probably a better way to do this but I added another rewrite condition to fix this:

RewriteEngine on
Options +FollowSymLinks -MultiViews
RewriteBase /

## hide .php extension
# To externally redirect /dir/foo.php to /dir/foo
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s([^.]+).php
RewriteRule ^ %1 [R=301,L]

RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s([^.]+)/\s
RewriteRule ^ %1 [R=301,L]

## To internally redirect /dir/foo to /dir/foo.php
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.*)$ $1.php [L]

Try this .htaccess:

Options +FollowSymLinks
RewriteEngine On
RewriteBase /

RewriteRule ^([^\.]+)$ $1.php [L]

EDIT: ^([^\.]+)$ $1.php [L]