Passing and Parse PayPal IPN Custom field

Question

I have setup a PayPal IPN file. When the user is at the site and press submit details about the transaction is uploaded to the db. The relevant id is sent via PayPal as the

Answer 1

Here is an example using JSON:

Then on the other side:

$custom = json_decode($_POST['custom'], true);
$member_id = $custom[0];
$coupon = $custom[1];

You can also parse associative arrays too:

 $member_id, 'coupon' => $coupon);
  $data = json_encode($arr);
?>

Then on the other side:

$custom = json_decode($_POST['custom'], true);
$member_id = $custom['id'];
$coupon = $custom['coupon'];

There's a nice symmetry when using JSON to parse the data.