need PHP code for clickbank hoplink

Hello, I am a vendor for clickbank setting up my affiliate links to allow affiliates to use different links to send them to three different pages (products). I am currently using the code below, but it only works for the last "If" statement (product 3) and the "else" statement (product 1), but not for product 2.

Currently using these three clickbank links:

AFFILIATE.VENDER.hop.clickbank.net/

and

AFFILIATE.VENDER.hop.clickbank.net/?site2=product2

and

AFFILIATE.VENDER.hop.clickbank.net/?site3=product3

code:

<?php
$site2 = $_GET['site2'];
$site3 = $_GET['site3'];

if($site2 == "product2")
{
$address = "www.example.com/product2/";
header("Location: $address");
}

if($site3 == "product3")
{
$address = "www.example.com/product3/";
header("Location: $address");
}

else
{
$address = "www.example.com/product1/";
header("Location: $address");
}

?>




So, product 1 & 3 works, but NOT product 2. Can someone tell me if there is something I can fix here to make this work right?

 

Why don't make one variable?

index.php?site=product1
index.php?site=product2
index.php?site=product3

$address = "";
$site = $_GET['site'];

if ($site === "product2") {
   $address = "www.example.com/product2/";
   header("Location: $address");
} elseif ($site === "product3") {
   $address = "www.example.com/product3/";
   header("Location: $address");
} else {
   $address = "www.example.com/product1/";
   header("Location: $address");
}

Code (markup):

and this case is suitable for switch statement.

 

That worked, thank you!