将数据从DB分配给购物车的变量

Question

我想用php制作购物车。首先，我从sql DB表中获取数据，然后将它们添加到数组中。现在我想将这些数据添加到html表中。每行包含一个名为＆＃39;添加到购物车的按钮＆＃39;。当我点击任何按钮（＆＃39;添加到购物车＆＃39;）时，只会将数组的最后一项添加到购物车数组中。我该怎么做。

$query = "SELECT * FROM `item` WHERE 1";

$result = mysqli_query($con,$query);
$k = mysqli_num_rows($result);
$row_array;
while($test_row = mysqli_fetch_array($result)){
    $row_array[]=$test_row;
    [enter image description here][1]
}
foreach($row_array as $key=>$value){
    echo "<tr>";
        echo "<td>";
            echo $row_array[$key]['item_id'];
            echo '<input type="hidden" name="item_id" value="' . $row_array[$key]['item_id'] . '" />';
        echo "</td>";

        echo "<td>";
            echo $row_array[$key]['item_name'];

        echo "</td>";

        echo "<td>";
            echo $row_array[$key]['item_category'];

        echo "</td>";

        echo "<td>";

        echo $row_array[$key]['item_price'];
            echo '&nbsp &nbsp &nbsp<input type = "submit" name = "add_to_cart" class = "btn btn-success" value = "Add to cart" />';
        echo "</td>";
    echo "</tr>";
}`