htaccess redirect subdomain to root domain

Question

I want to redirect this subdomain:

http://abc.domain-name.com

to a folder on the root domain that uses the same name:

http:         


        

Answer 1

You should consider about search engines and use permanent redirect (301), also its best practice to use NC flag at the end if second line to be matched in a case-insensitive manner.

RewriteEngine On
RewriteCond %{HTTP_HOST} ^blog\.example\.com  [NC]
RewriteRule ^(.*) http://www.example.com/$1 [L,R=301]