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PHP: shopping cart empty after clicking the add button
http://forums.devnetwork.net/viewtopic.php?f=1&t=145362
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Author:  mariade [ Sun Jan 07, 2018 6:07 am ]
Post subject:  PHP: shopping cart empty after clicking the add button

As per title, I have a problem when adding products to the cart: it would show a window message that says that the product has been added, but in truth it is not there. It gives the following error: Fatal error: Cannot use object of type stdClass as array .

La linea di codice e': <td><?php echo $value['item_name']; ?></td>

Here is the code file reserve.php :


Syntax: [ Download ] [ Hide ]
 <?php
 
  session_start();
  ini_set('display_errors', 1);
  $connect = mysqli_connect('127.0.0.1', 'root', '***********', 'Community Garden List');
 
 
  if (isset($_POST['add'])) {
    if (isset($_SESSION['cart'])) {
        $item_array_id = array_column($_SESSION['cart'], 'product_id');
        if (!in_array($_GET['id'], $item_array_id)) {
            $count = count($_SESSION['cart']);
            $item_array = array(
                'product_id' => $_GET['id'],
                'item_name' => $_POST['hidden_name'],
                'product_price' => $_POST['hidden_price'],
                'item_quantity' => $_POST['quantity'],
            );
            $_SESSION['cart'][$count] = $item_array;
            echo '<script>window.location="reserve.php"</script>';
        } else {
            echo '<script>alert("Product is already Added to Cart")</script>';
            echo '<script>window.location="reserve.php"</script>';
        }
    } else {
        $item_array = array(
            'product_id' => $_GET['id'],
            'item_name' => $_POST['hidden_name'],
            'product_price' => $_POST['hidden_price'],
            'item_quantity' => $_POST['quantity'],
        );
        $_SESSION['cart'][0] = $item_array;
    }
 }
 
 if (isset($_GET['action'])) {
    if ($_GET['action'] == 'delete') {
        foreach ($_SESSION['cart'] as $keys => $value) {
            if ($value['product_id'] == $_GET['id']) {
                unset($_SESSION['cart'][$keys]);
                echo '<script>alert("Product has been Removed...!")</script>';
                echo '<script>window.location="reserve.php"</script>';
            }
        }
    }
 }
 ?>
 
    ?>



html code


Syntax: [ Download ] [ Hide ]
  <?php
 
     $query = 'SELECT * FROM product ORDER BY serial ASC';
     $result = mysqli_query($connect, $query);
 
     if (mysqli_num_rows($result) > 0) {
         while ($row = mysqli_fetch_array($result)) {
             ?>
             <div class="col-md-4">
            <form method="post" action="reserve.php?action=add&id='.$row['id'].">
            <div style="border: 1px solid #eaeaec; margin: -1px 19px 3px -1px; box-shadow: 0 1px 2px rgba(0,0,0,0.05); padding:10px;" align="center">
 
                <img src="<?php echo $row['image']; ?>" class="img-responsive" style="width:100%;>
            <h5 class="text-info"><?php echo $row['pname']; ?></h5>
            <h5 class="text-danger">€ <?php echo $row['price']; ?></h5>
            <h5 class="text-info"><?php echo $row['pdescription']; ?></h5>
            <input type="text" name="quantity" class="form-control" value="1">
            <input type="hidden" name="hidden_name" value="<?php echo $row['pname']; ?>">
            <input type="hidden" name="hidden_price" value="<?php echo $row['price']; ?>">
            <input type="hidden" name="hidden_pdescription" value="<?php echo $row['pdescription']; ?>">
            <input type="submit" name="add" style="margin-top:5px;" class="btn btn-success" value="Add to Bag">
            </div>
            </form>
            </div>
                }
        }
        ?>
   
 <?php
                if(!empty($_SESSION["cart"])){
                    $total = 0;
                    foreach ($_SESSION["cart"] as $key => $value) {
                        ?>
                        <tr>
                            <td><?php echo $value["item_name"]; ?></td>
                            <td><?php echo $value["item_quantity"]; ?></td>
                            <td>$ <?php echo $value["product_price"]; ?></td>
                            <td>
                                $ <?php echo number_format($value["item_quantity"] * $value["product_price"], 2); ?></td>
                            <td><a href="Cart.php?action=delete&id=<?php echo $value["product_id"]; ?>"><span
                                        class="text-danger">Remove Item</span></a></td>

                        </tr>
                        <?php
                        $total = $total + ($value["item_quantity"] * $value["product_price"]);
                    }
                        ?>
                        <tr>
                            <td colspan="3" align="right">Total</td>
                            <th align="right">$ <?php echo number_format($total, 2); ?></th>
                            <td></td>
                        </tr>
                        <?php
                    }
                ?>
            </table>
        </div>

    </div>
 



I've tried print "<pre>"; var_dump($row); exit; after this line: foreach e($_SESSION['cart'] as $key => $value) { and it comes a table with NULL inside. What does that mean?

Before that, i tried to change $value['item_name'] with $value->item_name , and i got the following error:
Notice: Undefined property: stdClass::$item_name in

Will you please help me to understand what's wrong?thank you.

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