我不知道如何通過再次添加來更新已經在購物籃中的產品數量。如果數量為 1，添加數量為 3 的相同產品后，應在購物籃中顯示 4。我現在所能做的就是用新的數量替換添加的數量，或者在購物籃表中插入一個空元素，不包含任何產品詳細信息。<?php// Products are added to the basketif (!isset($_SESSION['basket'])) { $_SESSION['basket'] = array();}if ($_SERVER['REQUEST_METHOD'] == 'POST') { if (isset($_POST['id'])) { $_SESSION['basket'][$_POST['id']] = array( 'product_id'=>($_POST['id']), 'product_photo'=>($_POST['hidden_photo']), 'product_photo_alt'=>($_POST['hidden_photo_alt']), 'product_name'=>($_POST['hidden_name']), 'product_price'=>($_POST['hidden_price']), 'product_quantity'=>($_POST['quantity']) ); }}// This is the code with which I can only insert an empty element in the basket table with no product details.if ($_SERVER["REQUEST_METHOD"] == "POST") { if (isset($_POST['id']) && isset($_POST['quantity'])) { foreach ($_SESSION['basket'][$_POST['id']] as $item) { if ($_item['product_id'] === $_SESSION['basket']['product_id']) { $_SESSION['basket']['product_quantity'] += $item['product_quantity']; } } } }// If I apply below code it just replaces the quantity:if ($_SERVER["REQUEST_METHOD"] == "POST") { if (isset($_POST['id']) && isset($_POST['quantity'])) { foreach ($_SESSION['basket'] as $item) { if ($_item['product_id'] === [$_POST['id']]) { $item['product_quantity'] += $_POST['quantity']; } } } }?>
1 回答
茅侃侃
TA貢獻1842條經驗 獲得超21個贊
if ($_SERVER["REQUEST_METHOD"] == "POST") {
if (isset($_POST['do_it']) && $_POST['do_it'] == 'change') {
if (isset($_SESSION['basket'])) {
$is_available = 0;
foreach ($_SESSION['basket'] as $keys => $values) {
if ($_SESSION['basket'][$keys]['product_id'] == $_POST['id']) {
$is_available++;
$_SESSION['basket'][$keys]['product_quantity'] += $_POST['quantity'];
}
}
}
if ($is_available == 0) {
if (!isset($_SESSION['basket'])) {
$_SESSION['basket'] = array();
}
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
if (isset($_POST['id'])) {
$_SESSION['basket'][$_POST['id']] = array(
'product_id'=>($_POST['id']),
'product_photo'=>($_POST['hidden_photo']),
'product_photo_alt'=>($_POST['hidden_photo_alt']),
'product_name'=>($_POST['hidden_name']),
'product_price'=>($_POST['hidden_price']),
'product_quantity'=>($_POST['quantity'])
);
}
}
}
}
}
歸功于https://www.webslesson.info/2018/04/shopping-cart-by-using-bootstrap-popover-with-ajax-php.html
雖然，我不確定我是否理解$is_available代碼中的實際作用以及添加相同產品時它是如何指代增加數量的。
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