URL

http://mariano.freevar.com/htaccess/test/foo/bar/baz/u/e/v/f

$_SERVER['PHP_SELF']

/htaccess/index.php

$_REQUEST

Array
(
    [varfixa1] => test
    [varfixa2] => foo
    [bar] => baz
    [u] => e
    [v] => f
)

.htaccess

RewriteEngine on
RewriteBase /htaccess

RewriteRule ^((?:(?:[^/]+/){2})+)([^/]+)/?$ $1?$2                 [QSA,L]
RewriteRule ^([^/]+/.*/)([^/]+)/([^/]+)/?$ $1?$2=$3               [QSA,L]
RewriteRule ^([^/]+)/([^/]+)/?$ index.php?varfixa1=$1&varfixa2=$2 [QSA,L]
RewriteRule ^([^./]+)/*$ index.php?varfixa=$1                     [QSA,L]

Headers

Host: mariano.freevar.com
User-Agent: claudebot
Accept: */*