Redirect WebPages in Apache WebServer

Recently I had to move my webserver to a different domain (i.e. URL).
Although the old domain was still around for some more time; I still wanted my old users/viewers to be redirected to the new website.

This article in yolinux did the trick
http://www.yolinux.com/TUTORIALS/ApacheRedirect.html

I had to replace my index.php with something like this :