You should really have tried this yourself first, but in PHP it’s pretty basic
<?php
if(isset($_GET['id'])){
if($_GET['id'] == xx){
header('Location: http://www.anotherURL.com');
exit ();
}
}
?>
Substitute xx
for whatever you want to test the id
against.
3
solved How to redirect to another URL if query string match? [closed]