-- Lighttpd Server configuration ---------------------------------------------

Place this code to /etc/lighttpd/lighttpd.conf:

server.modules	+=( "mod_rewrite", "mod_redirect" )
url.redirect	= ( "^([^\.^\?]+?[^\/])?(\?.*)?$" => "$1/$2" )
url.rewrite	= ( "^/([^\.^\?]+/)?(\?.*)?$" => "/controller/xamp.php$2" )



-- Apache Server configuration -----------------------------------------------

Place this code to .htaccess in root host directory 
or (in some cases) virtual host configuration file:

DirectoryIndex controller/xamp.php

RewriteEngine  On
RewriteCond    %{REQUEST_FILENAME}     !-d
RewriteCond    %{REQUEST_FILENAME}     !-s
RewriteCond    %{REQUEST_FILENAME}     !-l

RewriteRule    ^([^\.]+\/)?$   controller/xamp.php [L,QSA]