rewrite url for subdomain (joomla)

[wanttobe]

hi, i need your help, and there is the problem

1. i want to have virtual subdomain like subdomain.example.com

2. the true url that i want to rewrite is
http://example.com/index.php?option=com_content&view=article&id=73&Itemid=267&toko=subdomain

3. i have activated joomla SEF so i got new url, like
http://example.com/toko-user?toko=subdomain

4. i want htaccess to rewrite that url (no.3) to something like this
http: //subdomain.example.com

5. the code that i put in htaccess is

########## Begin - Custom subdomain
RewriteCond %{HTTP_HOST} ^([^.]+)\.example\.com [NC]
RewriteCond %1 !^www$ [NC]
RewriteRule ^(.*)$ http://example.com/toko-user?toko=%1 [L]
########## End - Custom subdomain

if i write url in address bar like http: //subdomain.example.com
i got the page that i want, but the url in address bar change to
http://example.com/toko-user?toko=subdomain (redirecting) and what i want is not that, but rewrite

but if i change the script to
RewriteRule ^(.*)$ /toko-user?toko=%1 [L]

i got internal server error (500)

can you tell me what is wrong with my code?

best regards

[Cags]

Using a domain in the second half of a RewriteRule causes a Redirect to occur, rather than a Rewrite (the same as if you provide the R flag).

A 500 error is nearly always caused by an infinite loop meaning the address never resolves. Your best bet will be to use RewriteLog and see what's actually happening during your request.

I don't see how just the rules you have posted could cause this, but I'm assuming you have other RewriteRules in the file that are causing the problem. One thing that I will mention is the fact that the rule you currently have will send all requests to the exact same page. You are not persisting the REQUEST_URI part of the request, not the QUERY_STRING, so all requests to a sub-domain will end up at /toko-user?toko=subdomain regardless of what page is requested from that subdomain.