Módulo cartão

// Créditos aplicados à fatura
$invoiceCredit	=	(int)($GetInvoiceResults['credit'] * 100);

if ( $invoiceCredit > 0 and $discount_item > 0 ) {
	$whmcs_discount = (int)($invoiceCredit + $discount_item);
}
elseif ( $invoiceCredit > 0 and !$discount_item ) {
	$whmcs_discount = (int)$invoiceCredit;
}
elseif ( !$invoiceCredit and $discount_item > 0 ) {
	$whmcs_discount = (int)$discount_item;
}

if ( $whmcs_discount > 0 ) {
	$discount = [
		'type' => 'currency',
		'value' => $whmcs_discount,
	];
	$_SESSION['discount']	= $discount;
}

if ($debug) {
	echo '<pre class="debug"><p class="ok">Itens calculáveis da Fatura</p>';
	print_r($invoiceItemsItem);
	echo '<br>';
	print_r($items);
	echo '$discount:<br>', print_r($discount), '<br>';
	echo '</pre>';
}