Make virtual host, htaccess or php.ini or http.conf or etc?

Question

I want to make a blog system. A popular blog address looks like blogname.sitename.com .

I think that this address should redirect to something like sitename.com/index.php?user=blogname .

Because is not logical that make a subdomain for every blog. Is that correct?

So, I write this code for .htaccess :

RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{HTTP_HOST} !^(www|mail).mydomain.com$ [NC]
RewriteCond %{HTTP_HOST} !^(www|mail).mydomain.com$ [NC]
RewriteCond %{HTTP_HOST} ^(www\.)?([a-z0-9-]+).mydomain.com$ [NC] 
RewriteRule ^(.*)/$ ?option=user&id=$2 [R=301,L]

But it does not work. I guess that I should do some configuration another where.

Where is the configuration source? What is the configuration?

Answer 1

使用$ 2代替％2

RewriteRule ^(.*)/$ /index.php?user=$2 [R=301,L]