Trailing slash at end of URL bug .htaccess

Question

My problem is, when I enter http://example.com/admin/ it works well, $_GET['decode'] contains right information and I can work with it. But when I enter http://example.com/admin (without slash), my URL redirects to http://example.com/admin/?decode=admin and everything is messed up. Could someone helps me?

Here is my .htaccess:

RewriteEngine on 
Options +FollowSymlinks

<FilesMatch "(config.php|defines.php|functions.php)">
  Order Allow,Deny
  Deny from all
</FilesMatch>

Header set X-UA-Compatible "IE=Edge,chrome=1"

RewriteCond %{HTTP_HOST} ^www\.(.*) [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,NC,L]

RewriteCond %{REQUEST_URI} !(/$|\.) 
RewriteRule (.*) %{REQUEST_URI}/ [R=301,L] 

RewriteRule ^([^\.]+)$ ./index.php?decode=$1 [L,QSA]

php_value date.timezone "Europe/Bratislava"

Answer 1

It is because mod_dir is adding a trailing slash in the directory URI (/admin) after your last rule is run by mod_rewrite.

Try this code:

DirectorySlash Off
RewriteEngine on 
Options +FollowSymlinks

<FilesMatch "(config.php|defines.php|functions.php)">
  Order Allow,Deny
  Deny from all
</FilesMatch>

Header set X-UA-Compatible "IE=Edge,chrome=1"

RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC]
RewriteRule ^ http://%1%{REQUEST_URI} [R=301,NE,L]

## Adding a trailing slash
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{THE_REQUEST} \s/+(.*?)[^/][?\s]
RewriteRule [^/]$ %{REQUEST_URI}/ [L,R=301]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^/]+)/?$ ./index.php?decode=$1 [L,QSA]

php_value date.timezone "Europe/Bratislava"