Redirecting URL without www to www

问题

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.

回答1:

Try this mod_rewrite rule:

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

回答2:

RewriteEngine On

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

回答3:

If you are using nginx, then add this line to nginx config:

server {
  listen 80;
  server_name yourdomain.com;
  rewrite ^/(.*) http://www.yourdomain.com/$1 permanent;
}

来源：https://stackoverflow.com/questions/2272159/redirecting-url-without-www-to-www