link back to same site

[bluegray]

I'm thinking of adding some code to my page to change the stylesheet with php.
I will have to make some links like :

<a href="./switcher.php?set=red">
click here to change to RED style!</a>

switcher.php will look something like this:

<?php
setcookie ('sitestyle', $set, time()[phone], »
'/', 'yourdomain.com', '0');
header("Location: $HTTP_REFERER");
?>

I was wondering if this will have any effect on the PR rating as it is essentially a link back to the same page.

Thanks for any help.