php / mysql购物车重定向问题

Question

所以我想进入我的orderSuccess.php文件，但是该文件显示此错误消息（我告诉它）：

header("Location: $redirectLoc");应该重定向到orderSuccess.php，但不满足其条件，它只是刷新页面("Location: $redirectLoc"); = $redirectLoc = 'checkout.php'; < / p>

它需要到达orderSuccess.php，但失败：

<?php
// Initialize shopping cart class
require_once 'Cart_class.php';
$cart = new Cart;

// Include the database config file
require_once 'dbConfig.php';

// Default redirect page
$redirectLoc = 'index.php';

// Process request based on the specified action
if(isset($_REQUEST['action']) && !empty($_REQUEST['action'])){
    if($_REQUEST['action'] == 'addToCart' && !empty($_REQUEST['id'])){
        $productID = $_REQUEST['id'];

        // Get product details
        $query = $db->query("SELECT * FROM products WHERE id = ".$productID);
        $row = $query->fetch_assoc();
        $itemData = array(
            'id' => $row['id'],
            'name' => $row['name'],
            'price' => $row['price'],
            'qty' => 1
        );

        // Insert item to cart
        $insertItem = $cart->insert($itemData);

        // Redirect to cart page
        $redirectLoc = $insertItem?'viewCart.php':'index.php';
    }elseif($_REQUEST['action'] == 'updateCartItem' && !empty($_REQUEST['id'])){
        // Update item data in cart
        $itemData = array(
            'rowid' => $_REQUEST['id'],
            'qty' => $_REQUEST['qty']
        );
        $updateItem = $cart->update($itemData);

        // Return status
        echo $updateItem?'ok':'err';die;
    }elseif($_REQUEST['action'] == 'removeCartItem' && !empty($_REQUEST['id'])){
        // Remove item from cart
        $deleteItem = $cart->remove($_REQUEST['id']);

        // Redirect to cart page
        $redirectLoc = 'viewCart.php';
    }elseif($_REQUEST['action'] == 'placeOrder' && $cart->total_items() > 0){
        $redirectLoc = 'checkout.php';

        // Store post data
        $_SESSION['postData'] = $_POST;

        $first_name = strip_tags($_POST['first_name']);
        $last_name = strip_tags($_POST['last_name']);
        $email = strip_tags($_POST['email']);
        $phone = strip_tags($_POST['phone']);
        $address = strip_tags($_POST['address']);

        $errorMsg = '';
        if(empty($first_name)){
            $errorMsg .= 'Please enter your first name.<br/>';
        }
        if(empty($last_name)){
            $errorMsg .= 'Please enter your last name.<br/>';
        }
        if(empty($email)){
            $errorMsg .= 'Please enter your email address.<br/>';
        }
        if(empty($phone)){
            $errorMsg .= 'Please enter your phone number.<br/>';
        }
        if(empty($address)){
            $errorMsg .= 'Please enter your address.<br/>';
        }
//What happens here
        if(empty($errorMsg)){
            // Insert customer data in the database
            $insertCust = $db->query("INSERT INTO customers (first_name, last_name, email, phone, address) VALUES ('".$first_name."', '".$last_name."', '".$email."', '".$phone."', '".$address."')");
            // error 3 HERE!!!!! HERE!
            if($insertCust){
                $custID = $db->insert_id;

                // Insert order info in the database
                $insertOrder = $db->query("INSERT INTO orders (customer_id, grand_total, created, status) VALUES ($custID, '".$cart->total()."', NOW(), 'Pending')");
                //error 2
                if($insertOrder){
                    $orderID = $db->insert_id;

                    // Retrieve cart items
                    $cartItems = $cart->contents();

                    // Prepare SQL to insert order items
                    $sql = '';
                    foreach($cartItems as $item){
                        $sql .= "INSERT INTO order_items (order_id, product_id, quantity) VALUES ('".$orderID."', '".$item['id']."', '".$item['qty']."');";
                    }

                    // Insert order items in the database
                    $insertOrderItems = $db->multi_query($sql);
                    //error 1
                    if($insertOrderItems){
                        // Remove all items from cart
                        $cart->destroy();

                        // Redirect to the status page
                        $redirectLoc = 'orderSuccess.php?id='.$orderID;
                    }else{
                        $sessData['status']['type'] = 'error';
                        $sessData['status']['msg'] = 'Some problem occurred, please try again1.';
                    }
                }else{
                    $sessData['status']['type'] = 'error';
                    $sessData['status']['msg'] = 'Some problem occurred, please try again2.';
                }
            }else{
                $sessData['status']['type'] = 'error';
                $sessData['status']['msg'] = 'Some problem occurred, please try again';
            }
        }else{
            $sessData['status']['type'] = 'error';
            $sessData['status']['msg'] = 'Please fill all the mandatory fields.<br>'.$errorMsg;
        }
        $_SESSION['sessData'] = $sessData;
    }
}

// Redirect to the specific page
header("Location: $redirectLoc");
exit();

这是数据库：