$config = array( 'billingAddress' => array( 'firstName' => 'John', 'lastName' => 'Smith', 'addressLine1' => '123 Main St', 'addressLine2' => '', 'city' => 'New York', 'state' => 'NY', 'postalCode' => '10001', 'country' => 'US' ), 'shippingOptions' => array( 'standard' => 4.99, 'express' => 9.99, 'overnight' => 19.99 ) );
if ($_POST['payment_method'] == 'credit_card') { $config['paymentMethod'] = 'Credit Card'; } else { $config['paymentMethod'] = 'PayPal'; } if ($_POST['delivery_date']) { $config['deliveryDate'] = $_POST['delivery_date']; }In this example, we are checking which payment method the customer has selected and setting the order configuration accordingly. We are also allowing the customer to choose a delivery date and including that in the configuration. Package library: It is difficult to determine the specific package library being used in these examples without more context. However, some popular libraries for e-commerce applications include Magento, WooCommerce, and Shopify.