Redirect all requests but one

I wonder how to redirect all requests like

foobar.com/cat
foobar.com/cat/1
foobar.com/etc

to

开发者_运维问答foobar.com/index.php

But not to affect

foobar.com/webmaster/

I don`t want foobar.com/webmaster/ to redirect to index.php. I want it default behavior

How to do that with mod_rewrite?

---

RewriteEngine on

RewriteRule ^webmaster/ - [QSA,L]
RewriteRule .* index.php [QSA,L]

---

try this foobar.com/(?!webmaster)[\w\/\d\_\-\:\;\?\=\.]+ as your regular expression to match all other except foobar.com/webmaster/

Apply this regex to select all except foobar.com/webmaster/ and match with

foobar.com/cat
foobar.com/cat/1
foobar.com/etc

add replace with

foobar.com/index.php