RewriteEngine on

RewriteRule ^admin/?$ admin.php [NC]
RewriteRule ^admin/([^/.]+)/?$ admin.php?action=$1 [NC]


RewriteRule ^([^/.]+)/?$ index.php?a=$1 [L]
RewriteRule ^([^/.]+)/([^/.]+)/?$ index.php?a=$1&b=$2 [L]
RewriteRule ^([^/.]+)/([^/.]+)/([^/.]+)/?$ index.php?a=$1&b=$2&c=$3 [L]

write this in your .htaccess

links are going to look like this

yourpage.de/yourVariableValue1/yourVariableValue2/

[NC] will remove the case sensitivity of your static words like "admin"

its going to work, even if you type

yourpage.de/adMIN

Modrewrite for PHP variables

php, xhtml, htaccess

PHP