apache - Mod rewrite, append directory as parameter -

i'm wondering how directory rewriting directory gets appended parameter regardless of remaining url.

for example, if have urls these:

example.com/peter/lois/stewie.php example.com/peter/lois/brian.php?drinks=martinis example.com/peter/lois/quagmire/meg.php

and need them rewrite to

example.com/lois/stewie.php?person=peter example.com/lois/brian.php?drinks=martinis&person=peter example.com/lois/quagmire/meg.php?person=peter

how go doing that?

thanks!

edit

so have implemented in sites-available file:

rewriterule ^/([a-z0-9]+)/lois(.*) /lois$2?person=$1 [qsa,l]

but instead of returning like

example.com/lois/stewie.php?person=peter

it's returning like

example.com/peter/lois/stewie.php?person=peter

so it's putting parameter @ end of url should, it's not dropping earlier directory.

mod_rewrite work this:

rewriteengine on rewriterule ^([a-z0-9]+)/(.*\.php) /$2?person=$1 [qsa,l]

Shashtri