Enable mod_rewrite and .htaccess through httpd.conf
and then put this code in your .htaccess
under DOCUMENT_ROOT
directory:
Options +FollowSymLinks -MultiViews
# Turn mod_rewrite on
RewriteEngine On
RewriteBase /
RewriteRule ^([^/]+)/([^/]+)/?$ index.php?action=$1&example=$2 [L,QSA]
RewriteRule ^([^/]+)/?$ index.php?action=$1 [L,QSA]