Use htaccess to redirect all traffic from root to specific subdomain page

Question

I have a site that has been up for some time. I had a blog on a subdomain for some time. I have decided to do away with the main site and just support the blog subdomain.

I have a redirect setup for this, but it carries all the extra parameters through to the blog which results in a file not found page appearing. I just want the redirect to go to the index page without parameters.

What I currently have in my .htaccess file is this

RewriteCond %{HTTP_HOST} ^.*$
RewriteRule ^/?(.*)$ "http\:\/\/blog\.foo\.org\/index\.php" [R=301,L]

When I get a request to

http://www.foo.org/foo/foo/?module=foo

it redirects to

http://blog.foo.org/foo/foo/index.php?module=foo

I want it to redirect to http://blog.foo.org/index.php

Answer 1

RewriteEngine On
Options +FollowSymlinks
RewriteCond %{HTTP_HOST} ^(www\.)?foo\.org$ [NC]
RewriteRule ^ http://blog.foo.org/ [R=301,L]

Answer 2

You have to specify the query in the replacement to override the original:

RewriteCond %{HTTP_HOST} !^blog\.example\.org$ [NC]
RewriteRule ^ http://blog.example.org/index.php? [R=301,L]

Answer 3

I have One issue, please help me. My issue is I have url subdomain.mydomain.com and want to redirect them mydomin.com/folder1/index.php?user=subdomain. but I don't want to change URL in addressbar so in addressbar the url should be subdomain.mydomain.com. What i have to do? My .htaccess code is

RewriteCond %{HTTP_HOST} !^www\.mydomain.com [NC]
RewriteCond %{HTTP_HOST} ([^.]+)\.mydomain.com [NC]
RewriteRule ^(.*)$ http://mydomain.com/folder1/index.php?user=%1 [L]

It redirect correctly, But Unfortunately, it affects the addressbar, so it's useless for me. Please help me. What I have to do? Thanks in advance.