Stripe-Void-The-Invoice-After-Cancel-The-Subscription.php

<?php
// webhook: customer.subscription.deleted
$sec_key = 'sk_live_xxxxxxxxxxxxxxxxxx';

require_once 'stripe-php/init.php';

$stripe = new \Stripe\StripeClient($sec_key);
$last_invoice = $stripe->invoices->all(['limit' => 1]);
$invoice_id = $last_invoice->data[0]->id;
$stripe->invoices->voidInvoice($invoice_id, []);