如何根据 id PHP 从会话数组中删除变量

Question

im 添加产品后尝试从购物车中删除产品。

你能帮忙吗

这是我的代码

加入购物车

.html：

<input type="hidden" name="pid" value="<?php echo $row['product_id']?>
<input type="double" name="weight" placeholder="Weight?" required>

.PHP：

session_start();
$pid = $_POST['pid'];
$weight = $_POST['weight'];
$p = "pid";
$p .= (string) $pid;
$w = "weight";
$w .= (string) $pid;
$_SESSION[$p]=$pid;
$_SESSION[$w] = $weight;
if(isset($_SESSION)){
header('location:../shopping-cart.php');
}

执行后，将添加产品。

在购物车中显示

foreach($_SESSION as $key => $values){
if(strpos($key, "pid") !== false){
$sql="select * from products where product_id = $_SESSION[$key]";
$result=$connect->query($sql);
$r = mysqli_fetch_assoc($result);
$w = "weight";
$w .= (string) $r['product_id'];
$weight = $_SESSION[$w];

HTML PHP 代码

<?php echo $r["product_name"];?>    
<?php echo 'LBP '.number_format($r['product_price'],0)?>
<input type="hidden" id="unitprice" onchange="f();" value="<?php echo $r['product_price']?>">
<input type="text" onchange="f();" id="quantity" value="<?php echo $weight ?>">
<input type="submit" value="Delete">
<input type="hidden" name="pid" value="<?php echo $r['product_id'] ?>">
<input type="hidden" name="pweight" value="<?php echo $weight ?>">

从购物车中删除不起作用 有什么帮助吗？

session_start();

$pidremove = $_POST['pid'];
$weightremove = $_POST['pweight'];

foreach($_SESSION as $key => $values){
if($_SESSION[$w]==$pidremove)
{
unset($_SESSION[$w]);
unset($_SESSION[$p]);
echo 'done';
}
}

Answer 1

HTML：

<input type="hidden" name="pid" value="<?php echo $row['product_id']; ?>" />
<input type="submit" name="remove" value="Remove">

.PHP：

unset($_SESSION['pid' . $_POST['pid']]
unset($_SESSION['weight' . $_POST['pid']]