subdomain redirection 301 is not working

Question

I am using .htaccess code for 301 redirection my subdomain to domain. And also using domain.php?id=123 and need to redirect it into the domain name. My codes are below.

  RewriteEngine On
  RewriteCond %{HTTP_HOST} !^http://www.domain.com/dom.php?id=12$
  RewriteRule (.*) http://www.domain.com/ [R=301,L]

But when I trying to do this, i got an error like, it redirect to http://www.domain.com/?id=12 page

Answer 1

You cannot match REQUEST_URI and QUERY_STRING using RewriteCond %{HTTP_HOST} , try this:

RewriteEngine On

RewriteCond %{QUERY_STRING} ^id=123$
RewriteRule ^dom\.php$ /? [R=301,L,NC]

This will redirect http://www.domain.com/dom.php?id=12 to http://www.domain.com/ .

Or to redirect any http://www.domain.com/dom.php?id=<number> :

RewriteCond %{QUERY_STRING} ^id=\d+$
RewriteRule ^dom\.php$ /? [R=301,L,NC]