Add Trailing Slash to URL - .htaccess

Question

My current .htaccess file looks like this:
RewriteEngine on
RewriteBase /
Options +FollowSymLinks -Indexes
RewriteRule ^video/(.*)$ video.php?id=$1 [L]
RewriteRule ^video/(.*)$([a-zA-Z0-9]+) video.php?id=$1 [L]
RewriteRule ^tag/(.*)/page-(.*)/$ tag.php?tag=$1&page=$2 [L]
RewriteRule ^tag/(.*)/page-(.*)$ tag.php?tag=$1&page=$2 [L]
RewriteRule ^tag/(.*)?$ tag.php?tag=$1
RewriteRule ^page/(.*)$ page.php?id=$1 [L]
RewriteRule ^feed feed.php [L]
i want to add a slash to all my url's
like this:
> example.com/video/video_id/
>
> example.com/tag/keyword/
>
> example.com/tag/keyword/page-2/ (3... and so on...)
>
> example.com/page/name/
>
> example.com/feed/
And i want to redirect my current links to the new slash url's
Can somebody help me, please?

Answer 1

Your current htaccess file supports a trailing / although you probably would prefer
RewriteRule ^video/(.*)/$ video.php?id=$1 [L]
So that you don't have to handle the / in video.php
Just update all of your URLs to be example.com/video/video_id/ instead of example.com/video/video_id in whatever you are using (your framework/flat HTML files).
Your old URLs will still work. If you really want to redirect them, you can:
RewriteCond %{REQUEST_URI} ^video/ [NC]
RewriteRule ^video/(.*)$ video.php?id=$1 [L,R=301]
The [NC] means No-case checking (so /VIDEO) would work. The [R=301] means permanent redirect (useful for SEO).
Go through and expand for your other rules.
Edit:
Sorry, I don't think it was quite right before. Try the following:
RewriteEngine on
RewriteBase /
Options +FollowSymLinks -Indexes
RewriteCond %{REQUEST_URI} ^video/ [NC]
RewriteRule ^video/(.*)$ video/$1/ [L,R=301]
RewriteRule ^video/(.*)/$ video.php?id=$1 [L]
RewriteCond %{REQUEST_URI} ^tag/ [NC]
RewriteRule ^tag/(.*)/page-(.*)$ tag/$1/page-$2/ [L,R=301]
RewriteRule ^tag/(.*)/page-(.*)/$ tag.php?tag=$1&page=$2 [L]
...