Two domains, 1 hosting, domain alias, and $_SERVER['SERVER_NAME']

One hosting, and have two domain, one primary and one more alias.
But the alias is only to be pointed into one of the subdirectory, and main domain hppy as it is.

Example:

public_html/ <- main domain take from here
-- dir1/
-- dir2/
-- 2nddomain/ <-- domain alias from here
--- index.html
-- dir3/
- index.php

So, in root directory, in this case public_html/ create index.php as below:

<?
if ( $_SERVER['SERVER_NAME'] == "number1.ac.com.my")
        header("Location: http://number1.ac.com.my/number1/");
else
        header("Location: http://anotherweb.com.my/index.php");;
?>

Ok. Good luck.

Thanks

//alak