http://shapeshed.com/journal/domain_...ing_in_apache/
PHP-Code:
RewriteEngine On
RewriteCond %{HTTP_HOST} ^(monkeyworld.com|ilovemonkeys.com|monkeysarecool.co.uk|monkeysrockmyworld.co.uk) [NC]
RewriteRule ^(.*)$ http://www.monkeyworld.com$1 [R=301,L]
RewriteCond %{HTTP_HOST} ^(www.ilovemonkeys.com|www.monkeysarecool.co.uk|www.monkeysrockmyworld.co.uk) [NC]
RewriteRule ^(.*)$ http://www.circalibrary.com$1 [R=301,L]