htaccess no-www for multiple domains

[the moose]

So, I have 2 domains - one is an alias of the other.

They are:

www.mydomain.com
www.mydomain.co.uk

I want to use htaccess to ensure that the following combinations:

mydomain.com/[whatever]
mydomain.co.uk/[whatever]
www.mydomain.com/[whatever]
www.mydomain.co.uk/[whatever]

all go to:

www.mydomain.co.uk/[whatever]

Just trying to have the domains active and not get the duplicate content for Google.

[the moose]

Does anyone have any idea how this is to be done with htaccess?

[timgolding]

i can tell you how its done with apache config if you can edit your apache configuration?

See http://www.codingforums.com/showthread.php?t=267701

[schleppel]

With mod_rewrite

Options +FollowSymLinks

RewriteEngine On

# If it's not www.example.co.uk
RewriteCond %{HTTP_HOST} !^www\.example\.co\.uk$ [NC]
# Redirect to www.example.co.uk
RewriteRule .* http://www.example.co.uk/$0 [R=301,L]

With <VirtualHost>s

# Catch the "other" domains
<VirtualHost *:80>
    ServerName example.co.uk
    ServerAlias example.com www.example.com

    # Redirect permanently to www.example.co.uk
    Redirect 301 / http://www.example.co.uk/
</VirtualHost>

# For www.example.co.uk
<VirtualHost *:80>
    ServerName www.example.co.uk

    # other config...
</VirtualHost>