Cancel Subscription At Period End

Question

QUESTION:

How does one append the "at_period_end" argument to the following PHP function in accordance with the relevant Stripe documentation ?

DOCUMENTATION:

STRIPE: cancel subscription

CODE:

<?php

require_once('./lib/Stripe.php');
Stripe::setApiKey("$APIKEY");

$cu = Stripe_Customer::retrieve("$CUSTOMER_ID");
$cu->subscriptions->retrieve("$SUBSCRIPTION_ID")->cancel();

?>

Answer 1

I found the correct solution to be:

$cu->subscriptions->retrieve("$SUBSCRIPTION_ID")->cancel(
     array("at_period_end" => true ));

Answer 2

Try specify the argument as an array like this:

$at_period_end = true;
$cu->subscriptions->retrieve("$SUBSCRIPTION_ID")->cancel(
     array("at_period_end" => $at_period_end));