PHP and passing variables?

[ragazzo]

I want to send out emails with a link that has a unique ID per message (i.e., http://www.server.com/unsub?ID=383dke92 and http://www.server.com/unsub?ID=kd0a83l2) and when a user clicks on the link, the ID value will be passed to a form field called ID. How do I do this? Thanks in advance.

 

[Beau]

<input type="hidden" name="ID" value="<?php echo $_GET['ID']; ?>"/>

 

[ragazzo]

bam! thanks