PHP：点击添加按钮后购物车为空

时间：2018-01-07 14:13:32

标签： php mysql add cart

根据标题，我在向购物车添加产品时遇到问题：它会显示一条窗口消息，说明产品已添加，但事实上它并不存在。它给出了以下错误：

  

致命错误：无法使用stdClass类型的对象作为数组

 <?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>';
            }
        }
    }
 }
 ?>

    ?>

这是代码文件reserve.php：

 <?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>

html代码

print "<pre>"; var_dump($row); exit;

我在此行之后尝试了foreach e($_SESSION['cart'] as $key => $value) {：NULL并且内部有$value['item_name']的表格。这是什么意思？

在此之前，我尝试使用$value->item_name更改public bool TryDequeue(out T result) { Node<T> curHead; Node<T> curTail; Node<T> next; do { curHead = _head; curTail = _tail; next = curHead.Next; if (curHead == _head) { if (next == null) { result = default(T); return false; } if (curHead == curTail) { Interlocked.CompareExchange<Node<T>>(ref _tail, next, curTail); } else { result = next.Item; if (Interlocked.CompareExchange<Node<T>>(ref _head, next, curHead) == curHead) break; } } } while (true); return true; } ，我收到以下错误：

  

注意：未定义的属性：

中的stdClass :: $ item_name

请你帮我理解什么是错的？谢谢。

2 个答案:

答案 0 :(得分：0)

我解决了一些错误，尝试将部件组装到正确的位置 我把所有内容都修改了，你应该复制你需要的粘贴部分。

<?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>';//   do not send content when you use sessions $_SESSION['cart'][0] = $item_array;
        } 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>';
            }
        }
    }
 }


     $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)) {
             die();
$tmimi1=<<<mimi1
<div class="col-md-4">
<form method="post" action="reserve.php?action=add&id={$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="{$rr1}" class="img-responsive" style="width:100%;">
<h5 class="text-info">{$row['pname']}</h5>
<h5 class="text-danger">€{$row['price']}</h5>
<h5 class="text-info">{$row['pdescription']}</h5>
<input type="text" name="quantity" class="form-control" value="1">
<input type="hidden" name="hidden_name" value="{$row['pname']}">
<input type="hidden" name="hidden_price" value="{$row['price']}">
<input type="hidden" name="hidden_pdescription" value="{$row['pdescription']}">
<input type="submit" name="add" style="margin-top:5px;" class="btn btn-success" value="Add to Bag">
</div>
</form>
</div>
mimi1;
         }
}
echo($tmimi1);
                if(!empty($_SESSION["cart"])){
                    $total = 0;
                    foreach ($_SESSION["cart"] as $key => $value) {
$tmimi2 =<<<mimi2
                        <tr>
                            <td>{$value["item_name"]}</td>
                            <td>{$value["item_quantity"]}</td>
                            <td>${$value["product_price"]}</td>
                            <td>$
mimi2;
echo($tmimi2);
echo number_format($value["item_quantity"] * $value["product_price"], 2);

$tmimi2=<<<mimi3
</td>
                            <td><a href="Cart.php?action=delete&id={$value["product_id"]}"><span
                                        class="text-danger">Remove Item</span></a></td>

                        </tr>
mimi3;
echo($tmimi3);
                        $total = $total + ($value["item_quantity"] * $value["product_price"]);
                    }
$tmimi2=<<<mimi4
                        <tr>
                            <td colspan="3" align="right">Total</td>
                            <th align="right">$ 
mimi4;
echo($tmimi4);
echo number_format($total, 2); 
$tmimi2=<<<mimi5
</th>
                            <td></td>
                        </tr>
mimi5;
echo($tmimi5);                    }
$tmimi2=<<<mimi6
            </table>
        </div>

    </div>
mimi6;
echo($tmimi6);
?>

答案 1 :(得分：0)

您之前删除了有关从在线天气数据中获取阵列的帖子，然后将答案发回给您？我不知道如何向您发送您所要求的内容，然后您删除该问题，然后推送发布答案＆＃39;按钮！（如果你是mimi谁问或者还有另一个mimi =不确定），如果你之前问我，我会给你答案：

＆＃13;
＆＃13; 
<?php
function print_r2($var){
	echo('<h3>'.$var.':</h3><br>');
	print_r($GLOBALS[$var]);echo('br');
}
function hr(){
	echo('<hr>');
}

$lines=implode(file('http://samples.openweathermap.org/data/2.5/weather?lat=35&lon=139&appid=b6907d289e10d714a6e88b30761fae22'));
print_r2('lines');hr();

$data = json_decode($lines);
print_r2('data');hr();
print('wind obj:');print_r($data->wind);hr();
print('speed:');print_r($data->wind->speed);hr();
print('deg:');print_r($data->wind->deg);hr();
?>
＆＃13;
＆＃13;
＆＃13;

并且在我的屏幕上我得到了..push RUN CODE SNIPPET！

＆＃13;
＆＃13; 
<h3>lines:</h3><br>{"coord":{"lon":139.01,"lat":35.02},"weather":[{"id":800,"main":"Clear","description":"clear sky","icon":"01n"}],"base":"stations","main":{"temp":285.514,"pressure":1013.75,"humidity":100,"temp_min":285.514,"temp_max":285.514,"sea_level":1023.22,"grnd_level":1013.75},"wind":{"speed":5.52,"deg":311},"clouds":{"all":0},"dt":1485792967,"sys":{"message":0.0025,"country":"JP","sunrise":1485726240,"sunset":1485763863},"id":1907296,"name":"Tawarano","cod":200}br<hr><h3>data:</h3><br>stdClass Object
(
    [coord] => stdClass Object
        (
            [lon] => 139.01
            [lat] => 35.02
        )

    [weather] => Array
        (
            [0] => stdClass Object
                (
                    [id] => 800
                    [main] => Clear
                    [description] => clear sky
                    [icon] => 01n
                )

        )

    [base] => stations
    [main] => stdClass Object
        (
            [temp] => 285.514
            [pressure] => 1013.75
            [humidity] => 100
            [temp_min] => 285.514
            [temp_max] => 285.514
            [sea_level] => 1023.22
            [grnd_level] => 1013.75
        )

    [wind] => stdClass Object
        (
            [speed] => 5.52
            [deg] => 311
        )

    [clouds] => stdClass Object
        (
            [all] => 0
        )

    [dt] => 1485792967
    [sys] => stdClass Object
        (
            [message] => 0.0025
            [country] => JP
            [sunrise] => 1485726240
            [sunset] => 1485763863
        )

    [id] => 1907296
    [name] => Tawarano
    [cod] => 200
)
br<hr>wind obj:stdClass Object
(
    [speed] => 5.52
    [deg] => 311
)
<hr>speed:5.52<hr>deg:311<hr>
＆＃13;
＆＃13;
＆＃13;

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