Apache rewrite based on subdomain

Question

I'm trying to redirect requests for a wildcard domain to a sub-directory.
ie. something.blah.example.com --> blah.example.com/something

I don't know how to get the subdomain name to use in the rewrite rule.

Final Solution:

RewriteCond %{HTTP_HOST} !^blah\.example\.com
RewriteCond %{HTTP_HOST} ^([^.]+)
RewriteRule ^(.*) /%1/$1 [L]

Or as pointed out by pilif

RewriteCond %{HTTP_HOST} ^([^.]+)\.blah\.example\.com$

Answer 1

@Sam

your RewriteCond line is wrong. The expansion of the variable is triggered with %, not $.

RewriteCond %{HTTP_HOST} ^([^\.]+)\.media\.xnet\.tk$
            ^

that should do the trick

Answer 2

Try this:

RewriteCond %{HTTP_HOST} (.+)\.blah\.domain\.com
RewriteRule ^(.+)$ /%1/$1 [L]

@pilif (see comment): Okay, that's true. I just copied a .htaccess that I use on one of my projects. Guess it has a slightly different approach :)