have one page like post.php3 then put a ? sign... Now type num=$variable. That way the URL will be dynamic. One post.php3 have it use num for something.. Like looking up an Id Number.
So your end result will be something like
<?php
$variable = "2";
echo "<a href='post.php3?num=$variable'>Click Here</a>";
?>
Lata!
Check out my site!
Chad