如何将.htaccess重定向到www。 版？ （不工作）

Question

I have the following code in .htaccess . It doesn't seem to work for some reason. Can anyone see why? It's in the root of my website.

Options +FollowSymLinks
RewriteEngine On

#Limit redirects at once (stops server crash)
 RewriteOptions MaxRedirects=10

#Redirect visitors to www. version of website
 RewriteCond %{HTTP_HOST} !^www\. [NC]
 RewriteRule ^(.*)$ http://www.MYDOMAIN.COM/$1 [R=301]

Obviously, mydomain.com is my domain name. Thanks in advance to anyone who can spot any problems!

UPDATE:

This works no problems. But if I access mydomain.com/link1/link2/ then it does not work.

The .htaccess for '/link2/' is:

#settings
 Options +FollowSymLinks
 RewriteEngine On
#homepage
 DirectoryIndex index.php

And for '/link1/':

#/linkgenerator/ never used, but temp redirect for neatness
 Redirect 302 /fbwiki/linkgenerator/ /fbwiki/link-generator/

#Serve error pages
  ErrorDocument 400 /link1/error.php
  ErrorDocument 401 /link1/error.php
  ErrorDocument 403 /link1/error.php?status=403
  ErrorDocument 404 /link1/error.php?status=404
  ErrorDocument 500 /link1/error.php?status=500

Answer 1

This config works for me

RewriteEngine on
RewriteCond %{HTTP_HOST} ^domain\.com
RewriteRule ^(.*)$ http://www.domain.com/$1 [R=permanent,L] 

Answer 2

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

Answer 3

It is not working for sub directories because those sub-directories have their own rewrite rules and by default these rules are not inherited by lower level .htaccess from their parents.

To overcome this you have 2 options:

1. Append similar www forcing rules in your lower level .htaccess as well OR

2. Add this line on top of your lower level .htaccess files:

    RewriteEngine On RewriteOptions Inherit # remaining rules will be below this 

UPDATE: Keep your www rule like this:

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