我是一个对php感兴趣的新生。我也在努力做一个项目，我们可以在网上订购，以提高我的人才。有一点，我有一个问题，我将分享以下代码。我可以使用会话将项目添加到购物车，并将它们存储在会话目录中。之后，我需要保存所有的产品添加到这个购物卡到数据库后，我按“ checkout ”按钮。但我不知道如何将会话中保存的数据批量记录到数据库中。在下面的代码片段中，我可以用print\r显示会话中保存的所有数据（即所有添加的产品）。但是我该如何在数据库中注册它们呢。如果你帮助我，我会很高兴的。祝你今天愉快。
我的网页
我犯的错误。

<?php
session_start();
require_once 'dbconnect.php';
?>

<?php require('header.php'); ?>

<?php require('menu.php'); ?>

    <h1 style="text-align: center; color: blue;">Sepetim</h1>
    <div>
    <table style="width: 100%">
    <tr>
    <th class="cart">Ürün İsmi</th>
    <th class="cart">Miktar</th>
    <th class="cart">Fiyat Detayları</th>
    <th class="cart">Sipariş Toplamı</th>
    <th class="cart">Sil</th>
    </tr>
    <?php
    $total = 0;

    //If have something in the cart. Display it.
    if(!empty($_SESSION["cart"]))
    {

        foreach($_SESSION["cart"] as $keys => $values)
        {
            ?>
            <tr class="cart">
            <td style="background-color: #d3dcf2"><?php echo $values["item_name"]; ?></td>
            <td class="cart"><?php echo $values["item_quantity"] ?></td>
            <td class="cart"><?php echo $values["product_price"]; ?> ₺</td>
            <td class="cart"><?php echo number_format($values["item_quantity"] * $values["product_price"], 2); ?> ₺</td>
            <td class="cart"><a id="delete" href="shop.php?action=delete&id=<?php echo $values["product_id"]; ?>"><span> X</span></a></td>
            </tr>
            <?php 
            $total = $total + ($values["item_quantity"] * $values["product_price"]);
        }

    } 
    ?>
    </table>
    </div>
    <center>
    <div>
        <?php 
        echo "<br>";
        //products with basket added.
        echo "<b>Added products </b><br>";
        print_r(array_values($_SESSION["cart"]));

         echo "<br><br> <b>Array keys</b><br>";
        $column=implode("," , array_keys($_SESSION["cart"][0]));
        echo "$column";

        echo "<br>";
        echo "<br><br> <b>Array values</b><br>";
        $values=implode(",",array_values($_SESSION["cart"][0]));
        echo "$values";
        echo "<br><br>";

        echo "<b>Count in Array</b><br>";
        $count=count($_SESSION["cart"]);
        echo $count;

        echo "<br><br>";

        //Insert Database
        if(!empty($_SESSION["cart"]))
        {
          foreach($_SESSION["cart"] as $keys => $values){

            $product_id=$values["product_id"];
            $item_name=$values["item_name"];
            $quantity=$values["item_quantity"];
            $product_price=$values["product_price"];
            $pro_sum=$values["item_quantity"] * $values["product_price"];
            $sql = "INSERT INTO order (product_id,item_name,quantity,product_price,pro_sum,total) 
            VALUES ($product_id,'$item_name',$quantity,$product_price,$pro_sum,$total)";

            if( $DBcon -> query($sql) === TRUE){
                echo "New record created succesfully.";
             }else{
                echo "Error : " . $sql . "<br>" . $DBcon->error;
            }

          }
        }

        echo "<br><br>";

        echo "<br><br>";

         ?>
        <p><u>Ürün toplamı: </u><?php echo number_format($total,2); ?> ₺</p>
        <p><u>Vergiler ve Ücretler : </u><?php echo number_format($total*0.18); ?> ₺</p>
        <h3>Toplam: <?php echo number_format($total*1.18); ?> ₺</h3>
        <h4><a id="checkout" href="checkout.php"> Siparişi Tamamla</a></h4>
    </div>
    </center>

<?php require('footer.php'); ?>