不从购物车中删除物品

Question

下面是我的 php 代码，展示了我如何从购物车中删除商品。网页中没有显示错误，但该项目没有删除，购物车没有更新。 使用完整代码编辑

    <div class="product_box">
            <form action="cart.php" method="post" enctype="multipart/data">

            <table align="center" width="700" bgcolor="skyblue">

                <tr>
                    <th>Remove</th>
                    <th>Product (s) </th>
                    <th>Quantity</th>
                    <th>Total Price</th>
                </tr>

        <?php  



        $total = 0;

         global $db;

         $ip = getIp();

         $sel_price ="select * from cart where ip_add='$ip'";

         $run_price = mysqli_query($db, $sel_price);

         while ($p_price=mysqli_fetch_array($run_price)) {

            $pro_id = $p_price['p_id'];

            $pro_price = "select * from products where product_id='$pro_id'";

            $run_pro_price = mysqli_query($db, $pro_price);

            while ($pp_price = mysqli_fetch_array($run_pro_price)) {

                $product_price = array($pp_price ['product_price']);

                $product_title = $pp_price['product_title'];

                $product_image = $pp_price['product_img1'];

                $single_price = $pp_price['product_price'];




                $values = array_sum($product_price);
                $total +=$values;

          //echo "Rs ." . $total;





            ?>

            <tr align="center">
                <td><input type="checkbox" name="remove[]"></td>
                <td><?php echo $product_title; ?><br>
                    <img src="admin_area/product_images/<?php echo $product_image;?>" width="50px" height="50px">
                 </td>
                <td><input type="text" name="qty" size="3"></td>
                <td><?php echo "Rs." . $single_price ?></td>
            </tr>



            <?php   } } ?> 
            <tr align="right">
                <td colspan="3">
                    <b> Sub Total: </b>
                </td>
                <td>
                    <?php echo "Rs." .$total; ?>
                </td>
            </tr>
            <tr align="center">
                <td colspan="1"><input type="submit" name="update_cart" value="Update Cart"></td>
                <td><input type="submit" name="continue" value="Continue Shopping"></td>
                <td><button><a href="checkout.php">Checkout</a></button></td>
            </tr>


            </table>

            </form>

            <?php
$ip = getIp();

        if (isset($_POST['update_cart'])) {

            foreach ($_POST['remove'] as $remove_id) {

                $delete_product = "delete from cart where p_id=".$remove_id." AND ip_add=".$ip;
                $run_delete = mysqli_query($db, $delete_product);
                if ($run_delete) {
                    echo "<script>window.open('cart.php','_self')</script>";
                }

            }
        }

}


             ?>
        </div>
        </div>

我尝试通过在 if 语句之后添加以下代码来检查错误，但没有成功。

else { echo mysqli_error($db);}

请帮忙谢谢。

Answer 1

尝试使用 writelog 检查您的 mysql 语句是否正在获取值。这是一个小功能，可以帮助您更好地调试。

<?php   
function writelog($content) {
    $file = 'log.txt';
    file_put_contents($file, date("Y-m-d H:i:s")." : ".$content."\r\n", FILE_APPEND | LOCK_EX);
}

//Only display php errors to the developer...
if($_SERVER['REMOTE_ADDR'] == "put your localhost ip address")
{
    error_reporting(0);
    ini_set('display_errors', 'On');
    $db_hostname = "localhost";
    $db_database = "ecommerce";
    $db_username = "root";
    $db_password = "";      
}
else
{
    error_reporting(0);
    ini_set('display_errors', 'On');
    $db_hostname = "localhost";
    $db_database = "ecommerce";
    $db_username = "root";
    $db_password = "";              
}

//Establishing database connection
$db_connection = mysqli_connect($db_hostname, $db_username, $db_password, $db_database) or die(mysqli_error($db_connection));

如何使用此功能的示例： write_log($delete_product);

这将创建一个文本文件，其中包含您当前的 php 文件。 从这个网站学习一个完整的 CRUD php mysqli 示例：

try this it will help you in understanding better

Answer 2

我认为你应该与复选框一致

<tr align="center">
                <td><input type="checkbox" name="remove[]"></td>
                <td><?php echo $product_title; ?><br>
                    <img src="admin_area/product_images/<?php echo $product_image;?>" width="50px" height="50px">
                 </td>
                <td><input type="text" name="qty" size="3"></td>
                <td><?php echo "Rs." . $single_price ?></td>
            </tr>

你应该在复选框中设置一个 value = product_id

<input type="checkbox" name="remove[]" id="<?=$pp_price['product_id']?>>

Answer 3

我得到了答案，我只是在输入复选框中添加了以下值，它可以工作。

<input type="checkbox" name="remove[]" value="<?php echo $pro_id; ?> ">

Answer 4

试试这个对你有帮助

$ip = getIp();
if (isset($_POST['update_cart'])) {
    foreach ($_POST['remove'] as $remove_id) {
        $delete_product = "delete from cart where p_id=".$remove_id." AND ip_add=".$ip;
        $run_delete = mysqli_query($db, $delete_product);
        if ($run_delete) {
            echo "<script>window.open('cart.php','_self')</script>";
        }
    }
}