htaccess - get all non-www traffic redirected to the www

问题

Can anyone suggest how I get non www traffic to redirect to the www version of a website using the htaccess file - I know I have one created in my root directory but cannot be sure what to put.. any ideas

回答1:

Relatively easily.

Match anything that does not begin with 'www.' and then redirect to the 'www.' version:

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

来源：https://stackoverflow.com/questions/9314520/htaccess-get-all-non-www-traffic-redirected-to-the-www