RewriteCond for url with parameters

Question

I've got a problem to rewrite an url. I want this :

http://www.foo.com/test.php?u=s1&id=12345&img=12

to

http://app.foo.com/12345-s1-12.test

First parameter u is a string, parameters id and img are integers.

I've started with something like that :

RewriteCond %{REQUEST_URI} ^/test.php?u=(.*)&id=(.*)&img=(.*)/ [NC]
RewriteRule (.*) http://app.foo.com/%2-%1-%3.test [QSA,R=301,L]

Thanks :)

EDIT :

Still doesn't work but i'm close!

RewriteCond %{REQUEST_URI} ^/test.php [NC]
RewriteCond %{QUERY_STRING} ^u=(.*)&id=(.*)&img=(.*)
RewriteRule (.*) http://app.foo.com/%2-%1-%3.test [QSA,R=301,L]

Now it give me that link :

http://app.foo.com/12345-s1-12.test?u=s1&id=12345&img=12

Instead of :

http://app.foo.com/12345-s1-12.test

:(

Answer 1

Solved!

RewriteCond %{REQUEST_URI} ^/test.php [NC]
RewriteCond %{QUERY_STRING} ^u=(.*)&id=(.*)&img=(.*)
RewriteRule (.*) http://app.foo.com/%2-%1-%3.test? [R=301,L]

Placing a ? on the end of the RewriteRule removes previous query string information.