Class PurchaseRequest has been deleted so demo codes needs to be updated

[Medicmind]

You need to update the demo scripts. The line

$purchase_request = new FatZebra\PurchaseRequest($_POST['amount'], $_POST['reference'], $_POST['name'], $_POST['card_number'], $_POST['card_expiry_month'] ."/". $_POST['card_expiry_year'], $_POST['card_cvv'], null, 'AUD');

needs to become

$response=$gateway->purchase($_POST['amount'], $_POST['reference'], $_POST['name'], $_POST['card_number'], $_POST['card_expiry_month'] ."/". $_POST['card_expiry_year'], $_POST['card_cvv'], null, 'AUD');

since you've deleted the PurchaseRequest class in FatZebra.class.php