我正在建立一个购物车，并遇到了一个我无法弄清楚的问题。
当我在购物车中保存更新后的数量时，它会清除<?php
session_start();
$new = $_GET['new']; //new product entry into cart
if($new){
if(!isset($_SESSION['cart'])){
$_SESSION['cart'] = array();
$_SESSION['items'] = 0;
$_SESSION['total_price'] = '0.00';
}
if(isset($_SESSION['cart'][$new])){
$_SESSION['cart'][$new]++;
}else{
$_SESSION['cart'][$new] = 1;
}
//$_SESSION['total_price'] = calculate_price($_SESSION['cart']);
//$_SESSION['items'] = calculate_items($_SESSION['cart']);
};
if(isset($_POST['save'])){ -----
foreach($_SESSION['cart'] as $newId=>$qty){ |
if($_POST[$newId] == '0'){ | I think the
unset($_SESSION['cart'][$newId]); | problem is
} else { | here?
$_SESSION['cart'][$newId] = $_POST[$newId]; |
} -----
}
//run price and item functions
};
if(($_SESSION['cart']) && (array_count_values($_SESSION['cart']))){
$cart = $_SESSION['cart'];
foreach($cart as $newProd=>$qty) {
require 'connect.inc.php';
$query = "SELECT `product_id`, `new_id`, `name`, `price`, `image` FROM `products` WHERE `new_id` = '$newProd'";
if ($query_run = mysql_query($query)) {
while ($query_row = mysql_fetch_assoc($query_run)) {
$product = $query_row['name'];
$price = $query_row['price'];
$image = $query_row['image'];
$productId = $query_row['product_id'];
$newId = $query_row['new_id'];
$tile = <<<TILE
<article class="itemCart">
<h1>$product</h1>
<img src="$image">
<p>$price GBP</p>
<form action="shopping-cart.php" method="post"><label for="$newId">Quantity </label>
<input id="cartQty" type="number" value="$qty" max="30" min="0" name="$newId"></br>
<input type="submit" name="save" value="Update"></form>
</article>
TILE;
echo $tile;
}
} else {
echo mysql_error();
}
}
}else{
echo '<h2>No items in your shopping cart</h2>';
};
中存储的值，但我更新的值除外。
foo(*o);
答案 0 :(得分：0)
我已经弄明白了！我正在用购物车中的每件商品回复<form>标签。
$tile = <<<TILE
<article class="itemCart">
<h1>$product</h1>
<img src="$image">
<p>$price GBP</p>
<form action="shopping-cart.php" method="post"><label for="$newId">Quantity </label>
<input id="cartQty" type="number" value="$qty" max="30" min="0" name="$newId"></br>
<input type="submit" name="save" value="Update"></form>
</article>
TILE;
echo $tile;
我已在<form action="shopping-cart.php" method="post">和</form>中包含整个脚本。我打算用ajax改进这个购物车，这样我每次都可以更新购物车而不会刷新页面...当我有时间学习它时。
希望这可以帮助那些犯了同样错误的人。