.htaccess query string redirect

I've been searching on Google and testing for hours, but still haven't made any headway.

Basically, I'm looking to direct any requests from:
http://www.example.com/index.php?code=whatever to http://www.example.com

I thought this should work:

RewriteRule ^index.php?code=(.*)$ http://www.example.com/ [R=301]

But it definetely does not. Can anyone point me in the right direction? Thanks!

 

What about this ?

RewriteCond %{QUERY_STRING} ^code=
RewriteRule index\.php$ http://domain.com/ [R=301]

Code (markup):

 

I should have been a bit more thourough in my question, I apologize. Basically, I want the normal user to see the full url string:

http://www.example.com/index.php?code=whatever

But I would like the search engine spiders to be directed to the homepage, so:
http://www.example.com

I have it pretty close with the following:

RewriteCond %{HTTP_USER_AGENT} ^Googlebot [OR]
RewriteCond %{HTTP_USER_AGENT} ^Slurp [OR]
RewriteCond %{HTTP_USER_AGENT} ^MSNbot
RewriteCond %{QUERY_STRING} ^code=(.*)$
RewriteRule ^index.php$ index.php? [R=301]
RewriteRule ^index.(.*)$ http://www.example.com/ [R=301,L]

There are a couple issues though. If you are NOT a spider and you go to the full URL string, you get redirected to "http://www.example.com/?code=test" rather than "http://www.example.com". Also, I'm not sure if having the last two redirects they way they are is very efficient.

 

I have problem like this URL:

http://www.macdevcenter.com/pub/a/mac/2004/02/03/latex.html?page=2
-OR-
http://www.oreilly.com/pub/a/mac/2004/02/03/latex.html?page=last

how to made RewriteRule in HTACCESS file, from URL above.

I try changed my .HTACCESS file before, to make some rewrite URL, then I use this script, to get permalink name of URL:

$URLID = str_replace(ABSOLUTE_PATH . PHOTOSHOP_PATH ,'', $_SERVER["REQUEST_URI"]); 
$URLID = str_replace(".html",'', $URLID); 
     
$sql = "SELECT * FROM ".COM_TUTOR." WHERE 
comPermalink = '$URLID'"; 

PHP:

But I want to get the last query (page=2) too
then I can do this script in PHP:
note: I want the HTML extention is still used.

<? if($page=2) { echo "this is page number 2"; } else { echo "this is page number 1"; } ?>

PHP:

thanks