Sorry if this has been covered, I can't find anything on this specifically.
I have wildcard subdomains on (*.mysite.com) I need a mod_rewrite expression for this rewrite:
bob.mysite.com => mysite.com/users/index.php?user=bob
bob.mysite.com/profile/ => mysite.com/users/index.php?user=bob/profile/
Obviously "bob" and "profile" are just examples, I need the general case. Thanks for your help!
The $ operator will let you extract backreferences from matches in rewrite rules and the % operator will let you extract references from conditions.
RewriteCond %{HTTP_HOST} !www.mysite.com$ [NC] # Presuming you don't want to do www
RewriteCond %{HTTP_HOST} ^(.*)\.mysite\.com [NC] # Catch subdomain
RewriteCond %{REQUEST_URI} !index\.php [NC] # Don't rewrite if we already have
RewriteRule ^(.*)$ /users/index.php?user=%1$1 [L]
