How to remove .php extension and add a trailing slash in specific folder with .htaccess

Question

I currently have a URL that looks like this:

www.mysite.com/folder-name/page-name.php

but I need it to look like this:

www.mysite.com/folder-name/page-name/

I'm after a regular expression for the .htaccess that goes in "folder-name" and targets only the folder it is in. It needs to remove the .php extension and redirect to a url with a trailing slash at the end.

Also if the url is www.mysite.com/folder-name/ I need the the expression to be ignored to avoid a // at the end. I've had a look but couldn't find a solution for just a particular folder. Just beginning with PHP and regex's are blowing my mind!.

I've found code like this:

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{THE_REQUEST} ^GET\ /[^?\s]+.php
RewriteRule (.*).php$ /$1/ [L,R=301]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule (.*)/$ $1.php [L]
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule .*[^/]$ $0/ [L,R=301]

but it returns urls unto this:

www.mysite.com/var/www/vhosts/mysite.com/httpdocs/folder_name/page_name/

Answer 1

The reason why you are getting the path like that is because apache is guessing whether your rule's target ( $0/ ) is a file path or URL path, and it's guessing incorrectly that it's a file path. You need to either provide a rewrite base:

RewriteBase /

or make your targets absolute URI's

RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule (.*)/$ /$1.php [L]

RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule .*[^/]$ /$0/ [L,R=301]