Question

I am using .htaccess for all my websites.

I would to make a universal .htaccess file to re-write to www.

for each and every domain address I have to replace on the .htaccess file

is there any tricks to get a universal which is change based on hosted server name with HTTP_HOST name

Answer 1

How about:

RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L,QSA]

UPD: got this rule worked locally