Question

我试图循环表名cart的所有行，但foreach仅显示输入的最后一行，并始终忽略之前的行。假设我在cart_table只有5个产品，只显示product_id[5]。如果用户添加第六项，则现在仅显示product_id[6]。 $item_count也总是等于1，就好像只有一个项目有多个时一样。根据我对foreach($items as $item) $items的理解，即使有多个项目也不会被视为数组。当我var_dump($items);显示array(1) { [0]=>...

时

add_cart.php

    <?php 
ob_start();
require_once $_SERVER['DOCUMENT_ROOT'].'/ecommerce/core/init.php'; 
$product_id = isset($_POST['product_id'])? sanitize($_POST['product_id']):'';
$size = isset($_POST['size'])? sanitize($_POST['size']):'';
$available = isset($_POST['available'])? sanitize($_POST['available']):'';
$quantity  = isset($_POST['quantity'])? sanitize($_POST['quantity']):'';
$item = array(); 
$item[] = array(
    'id'            => $product_id, 
    'size'         => $size, 
    'quantity' => $quantity,
    'available' => $available
    ); 
$domain =($_SERVER['HTTP_HOST'] != 'localhost')?'.'.$_SERVER['HTTP_HOST']:false;
$query = $db->query("SELECT * FROM product WHERE id = '{$product_id}'"); 
$product = mysqli_fetch_assoc($query); 
$_SESSION['success_flash'] = $product['prod_name']. ' was added to your cart.'; 

//check if the cart cookie exists
if (is_array($cart_id != ' ')) {
$cartQ = $db->query("SELECT * FROM cart WHERE id = '{$cart_id}'"); 
$cart = mysqli_fetch_assoc($cartQ); 
$previous_items = json_decode($cart['items'],true); 
$item_match = 0; 
$new_items = array(); 

foreach($previous_items as $pitem){
    if ($item[0]['id'] == $pitem['id'] && $item[0]['size'] == $pitem['size']) {
        $pitem['quantity'] = $pitem['quantity'] + $item[0]['quantity']; 

if ($pitem['quantity'] > $available) {
    $pitem['quantity'] = $available; 

} 
$item_match = 1; 
} 
$new_items[] = $pitem; 
}

if ($item_match != 1) {
    $new_items = array_merge($item,$previous_items); 
} 

$items_json = json_encode($new_items); 
$cart_expire = date("Y-m-d H:i:s",strtotime("+30 days")); 
$db->query("UPDATE cart SET items = '{$items_json}', expire_date = '{$cart_expire}' WHERE id = '{cart_id}'"); 
setcookie(CART_COOKIE,'',1,"/",$domain,false); 
setcookie(CART_COOKIE,$cart_id,CART_COOKIE_EXPIRE,'/',$domain,false); 

}else{ 
// add to databse and set cookie
    $items_json = json_encode($item); 
    $cart_expire = date("Y-m-d H:i:s",strtotime("+30 days"));
    $db->query("INSERT INTO cart (items,expire_date) VALUES ('{$items_json}','{$cart_expire}')"); 
    $cart_id = $db->insert_id; 
    setcookie(CART_COOKIE,$cart_id,CART_COOKIE_EXPIRE,'/',$domain,false); 
}
?>

cart.php

<?php
require_once 'core/init.php';
//include 'includes/headerpartial.php';
if($cart_id != ' ') {
    $cartQ      = $db->query("SELECT * FROM cart WHERE id ='{$cart_id}' ");
    $result     = mysqli_fetch_assoc($cartQ);
    $items      = json_decode($result['items'], true);
    $i          = 1;
    $sub_total  = 0;
    $item_count = 0;
}
?>
<?php if($cart_id == ' '): ?>
    <div class="bg-danger">
        <p class='text-center text-danger'>Your cart is empty.</p>
    </div>
<?php else: ?>
    <?php
    foreach ($items as $item) {
        var_export($items);
        $product_id   = $item['id'];
        $productQuery = $db->query("SELECT * FROM product WHERE id ='{$product_id}' ");
        $product      = mysqli_fetch_assoc($productQuery);
        $sArray       = explode(',', $product['sizes']);

/*      foreach ($sArray as $sizeString) {
            $s = explode(':', $sizeString);
            if($s[0] == $item['size']) {
                $available = $s[1];
            }
        }*/

        ?>

        <tr class="p">
            <td class="image"><img src="<?= $product['image_1']; ?>"/></td>
            <td class="name"><?= $product['prod_name']; ?></td>
            <td class="price"><?= money($product['price']); ?></td>
            <td class="quantity"><?= $item['quantity']; ?></td>
            <td class="pricesubtotal"><?= money($item['quantity'] * $product['price']); ?></td>
            <td class="remove">
                <div>&times</div>
            </td>
        </tr>
        <?php
        $i ++;
        $item_count += $item['quantity'];
        $sub_total += ($product['price'] * $item['quantity']);

    }
    $tax         = TAXRATE * $sub_total;
    $tax         = number_format($tax, 2);
    $grand_total = $tax + $sub_total;

     <?php      endif;?>

Answer 1

这是其中一个问题。你告诉我你的id是一个自动增量int，所以我想提出这个答案。问题出在你的sql命令中。

UPDATE cart SET items = '{$items_json}', expire_date = '{$cart_expire}' WHERE id = {cart_id}

请务必将该命令放在引号中。另外，我强烈建议使用此命令准备JSON：

$itemJson = addslashes($itemJson);

然后，您可以运行该命令。另一种可能性是使用mysqli的prepare方法。以下是一些示例的链接：

w3schools.com

如果您有任何其他问题，请随时更新您的问题，但请务必在评论中注明@McStuffins。

对于每个循环不循环所有行

1 个答案: