<?php // helper routine: collect the checkout data (size, appearance) and redirect // to index.[html, php] or to the spreadshirt checkout require_once 'ShirtOfDay.php'; // initialize spreadshirt library (load data) $aod = new ShirtOfDay(); $checkoutURL = $aod->goToCheckout($_POST['size'], $_POST['appearance']); // redirect to your website root document (index.php) because // the checkout url could not resolved if ($checkoutURL === NULL) { echo "Sorry, the parameters are not valid!"; echo '<meta http-equiv="refresh" content="20; URL=index.php">'; } else { // redirect to the spreadshirt checkouta header('Location: ' . $checkoutURL); // you can use this stuff too // echo "redirecting to checkout, please wait"; // echo '<meta http-equiv="refresh" content="0; URL='.$checkoutURL.'">'; }