你能帮我解决一下我的代码吗？我正在创建一个超级简单的购物车，可以添加购物车/更新和删除。但就目前而言，我已经做的是添加到购物车和显示项目。但我有一个错误。每次刷新页面时，会话都会自动附加到会话数组。
现在我需要做的就是这个。
验证产品是否在会话列表中。如果没有为此创建会话，如果是，则跳过它。
还有其他问题。如何创建更新/删除功能？
到目前为止，这是我的代码。这个过程只有1个PHP文件。
$category = $_GET['cat'];
$product_id = $_GET['product'];
//fn_print_r($_SESSION);
//unset($_SESSION['cart']);
$product_detail = get_allproduct_detail($product_id);
$prod_price = $product_detail['prod_price'];
$sale_price = $product_detail['sale_price'];
$prod_type = $product_detail['prod_type'];
if(!empty($_POST['product_id']) && !empty($_POST['product_name']) && !empty($_POST['product_price']) && !empty($_POST['sale_price']) && !empty($_POST['qty'])) {
$sess_id = $_POST['product_id'];
$sess_name = $_POST['product_name'];
$sess_price = $_POST['product_price'];
$sess_sale_price = $_POST['sale_price'];
$sess_qty = $_POST['qty'];
$compute_total = $sess_sale_price * $sess_qty;
$cart_row = array(
'product_id' => $sess_id,
'product_name' => $sess_name,
'product_price' => $sess_price,
'sale_price' => $sess_sale_price,
'qty' => $sess_qty,
'total' => $compute_total
);
if(!isset($_SESSION['cart'])){
$_SESSION['cart'] = array();
}
$_SESSION['cart'][] = $cart_row;
//fn_print_r($_SESSION);
}
这是表格流程
<form method="POST" action="?page=product&cat=<?php echo $_GET['cat']; ?>&product=<?php echo $_GET['product']; ?>" onsubmit="">
<div id="item_detail_right">
<label>Qty:<input type="text" name="qty" value="1" size="5" style="text-align: center" />
<input type="hidden" name="product_price" id="product_price" value="<?php echo $prod_price; ?>" />
<input type="hidden" name="sale_price" id="sale_price" value="<?php echo $sale_price; ?>" />
<input type="hidden" name="product_id" id="product_id" value="<?php echo $_GET['product']; ?>" />
<input type="hidden" name="product_name" id="product_name" value="<?php echo strtoupper(get_product_name($_GET['product'])); ?>" />
<input type="submit" value="+CART" />
<input type="button" value="+Wishlist" id="mywishlist" data-wishlist-id="<?php echo $_GET['product']; ?>" />
</div>
</form>
这是购物车的显示
if(!isset($_SESSION['cart']) || (count($_SESSION['cart']) == 0)) {
echo "<p>Your cart is empty</p>";
} else {
echo "<table border='0' style='font-size: 12px; width: 100%' cellpadding='5'>";
echo "<tr>";
echo "<td style='background-color: white; color: black; text-align: center'>Product ID</td>";
echo "<td style='background-color: white; color: black; text-align: center'>Name</td>";
echo "<td style='background-color: white; color: black; text-align: center'>Price</td>";
echo "<td style='background-color: white; color: black; text-align: center'>Sale Price</td>";
echo "<td style='background-color: white; color: black; text-align: center'>Quantity</td>";
echo "<td style='background-color: white; color: black; text-align: center'>Total</td>";
echo "<td style='background-color: white; color: black; text-align: center'></td>";
echo "</tr>";
$total = 0;
foreach($_SESSION['cart'] as $item) {
echo "<tr>";
echo "<td style='text-align: center; background-color: gray; color: black'>".$item['product_id']."</td>";
echo "<td style='text-align: left; background-color: gray; color: black'>".$item['product_name']."</td>";
echo "<td style='text-align: right; background-color: gray; color: black'>".number_format($item['product_price'],2)."</td>";
echo "<td style='text-align: right; background-color: gray; color: black'>".number_format($item['sale_price'],2)."</td>";
echo "<td style='text-align: center; background-color: gray; color: black'><input type='text' name='cart_qty[]' value='".$item['qty']."' size='10' style='text-align: center'></td>";
echo "<td style='text-align: right; background-color: gray; color: black'>".number_format($item['total'],2)."</td>";
echo "<td style='text-align: center; background-color: gray; color: black'><a href='#'>Update this?</a> | <a href='#'>Remove this?</div></td>"; //how can I use this to remove and update the session?
echo "</tr>";
$total += ($item['sale_price'] * $item['qty']);
}
echo "<tr>";
echo "<td colspan='7' style='text-align: right'>";
echo "<label>Subtotal Amount: </label><input type='text' name='subtotal' value='".number_format($total,2)."' readonly='readonly'>";
echo "<input type='submit' value='Place Item' />";
echo "</td>";
echo "</tr>";
echo "</table>";
}
这是我的数组
的示例输出Array
(
[visit] => nsrAROum86lb8VK
[slideshow] => 04-15-14
[cart] => Array
(
[0] => Array
(
[product_id] => 1
[product_name] => AJNA
[product_price] => 90
[sale_price] => 81
[qty] => 1
[total] => 81
)
[1] => Array
(
[product_id] => 1
[product_name] => AJNA
[product_price] => 90
[sale_price] => 81
[qty] => 1
[total] => 81
)
[2] => Array
(
[product_id] => 1
[product_name] => AJNA
[product_price] => 90
[sale_price] => 81
[qty] => 1
[total] => 81
)
[3] => Array
(
[product_id] => 1
[product_name] => AJNA
[product_price] => 90
[sale_price] => 81
[qty] => 1
[total] => 81
)
)
)
我将整个代码上传到此链接
http://www.mediafire.com/view/g6jah2bxbzda04l/aroma_shop.php
答案 0 :(得分：1)
您可以检查产品是否已在购物车中。
if(!isset($_SESSION['cart'])){
$_SESSION['cart'] = array();
}
// Instead of appending $cart_row immediately,
// $_SESSION['cart'][] = $cart_row;
// only add the $cart_row which has not been added previously
$found = false;
foreach ($_SESSION['cart'] as $c) {
if ($c['product_id'] == $cart_row['product_id']) {
$found = true;
}
}
if (!$found) {
$_SESSION['cart'][] = $cart_row;
}