从php的会话数组中删除购物车项目

Question

I have created a session array for items to go in a cart with its different properties. Each item has a remove button which deletes that item only.

FOR CREATING SESSION I HAVE USED

session_start();
if (isset($_POST['submit']))
{
    $front = $_POST['front_select'];
    $back = $_POST['back_select'];
    $side = $_POST['side_select'];
    $oid = $_POST['orderID'];
    $pid = $_POST['pid'];
    $cart = array (
    'oid' => $oid,
    'front' => $front,
    'back' => $back,
    'pid' => $pid,
    'side' => $side

    );


    $_SESSION['cart'][] = $cart;

    print_r($_SESSION['cart']);
}

FOR DISPLAYING ARRAY

 if(isset($_SESSION['cart'])){
                     $i = 0;
                        foreach ($_SESSION['cart'] as $item) {
                    if(isset($item['oid']) ){
<div class="col-xs-12 col-sm-12 col-md-12 col-lg-12">
                            <?php echo $i;?>
                            <h5>ORDER ID : <b id="oid">#<?php echo   $item['oid'];  ?></b> | ORDER TYPE : <b id="product_type">BLOUSE</b> | PRODUCT ID :  <b id="product_id"><?php echo $item['pid']; ?></b></h5>
                            <hr>
                        </div>
 <a id="remove_btn" href="removefromcart.php?id=<?php echo $i; ?>" class="btn btn-danger waves-effect waves-light">Remove</a>

}
}
}

removefromcart.php PAGE

<?php

session_start();
if (isset($_GET['id'])){
$id = $_GET['id'];
unset($_SESSION['cart'][$id]);
    unset($cart[$id]);
$_SESSION["cart"] = array_values($_SESSION["cart"]);

header('Location: cart.php');

    echo $id ;
}
else
{
    echo "ID NOT FOUND";
}
?>

Whenever I click on remove button page refreshes due to header but nothing deleted. What should I do Please HELP I really trust Stack overflow for helping noob coders.

AFTER THAT I USED below code to create array

if (isset($_POST['submit']))
{
    $front = $_POST['front_select'];
    $back = $_POST['back_select'];
    $side = $_POST['side_select'];
    $oid = $_POST['orderID'];
    $pid = $_POST['pid'];

    $cart = array (
    'oid' => $oid,
    'front' => $front,
    'back' => $back,
    'pid' => $pid,
    'side' => $side

    );

 $_SESSION['oid'] = $oid;
    $_SESSION['cart'][$oid] = $cart;

    print_r($_SESSION['cart']);
}

and getting

Array ( [0] => Array ( [oid] => IT574deb7ddbfe3 [front] => IT1_front_6 [back] => IT1_back_2 [pid] => IT1 [side] => IT1_side_7 ) [IT574ded04c8af2] => Array ( [oid] => IT574ded04c8af2 [front] => IT1_front_6 [back] => IT1_back_3 [pid] => IT1 [side] => IT1_side_2 ) )

REMOVE BUTTON CODE

 <div class="row">
                                <a id="remove_btn" href="removefromcart.php?id=<?php echo $item['oid']; ?>" class="btn btn-danger waves-effect waves-light">Remove</a>
                            </div>

Array first key is 0 which creates a problem for me. In my cart first item always remains although its remove button url id has different id.

Answer 1

Your delete isn't working, because you're not using that $id as your index when you build the cart:

$_SESSION['cart'][] = $cart;
                  ^--generate new ID based on current length of array

So if you have 3 items in your array, and add another one, its new index will be 3 , even if its $id happens to be 9999 or whatever.

You need to use that $id as the index everywhere:

$_SESSION['cart'][$id] = $cart;
                  ^^^---

and then your unset() will work as expected.