Redirecting URL without www to www

Question

I need your help. I want to test if the URL is entered without www

like example.com it should be forwarded to www.example.com.

Answer 1

Try this mod_rewrite rule:

RewriteEngine on
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^ http://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

Answer 2

RewriteEngine On

RewriteCond %{HTTP_HOST} ^example\.com$ [NC]
RewriteRule ^.*$ http://www.example.com/$0 [NC,L,R=301]