you mean you want to redirect surfers to different/random urls from predefined urls.
if this is the case then you can do like this
PHP Code:
<?php
$arr = array("url1", "url2");
header ("Location: " . $arr[array_rand($arr)]); ?>
this will randomly send surfers to one of the url.
you can add many more urls in above code like this
PHP Code:
<?php
$arr = array("url1", "url2", "url3", "url4", "url5", "url6");
header ("Location: " . $arr[array_rand($arr)]); ?>
You can even send surfers from specific country to specific url also.
Thanks