使用PHP在while循环中使用动态输入字段数组更新MYSQL数据库

我不是新来的，但这是我第一次在这个网站上寻求帮助

我有一个非常有趣的问题，我用整个

↓ 靠近底部，与while循环内的其他回声分离↓

<form class="" action="" method="post">
  <div class="form-item-special">
    <input class="colorize-button"
           type="submit" name="update_all_stock" value="Update All" />
  </div>

  <table>
    <thead>
      <tr>
        <th>Location ID</th>
        <th>Item Number</th>
        <th>Name</th>
        <th>Description</th>
        <th>Storage</th>
        <th>Edit Stock</th>
        <!-- <th>Delete</th> -->
        <th>In Stock</th>
        <!-- <th>Adjust</th> -->
      </tr>
    </thead>
    <tbody>

    <?php  
      if(isset($_GET['l_id'])) {
        $selected_items_id = $_GET['l_id'];

        $query = "SELECT * FROM items WHERE item_location_id = '$selected_items_id'";
        $selected_items_result = mysqli_query($connection, $query);

        if(!$selected_items_result) {
          echo "No items found " . mysqli_error($connection);
        } else {
          while($row = mysqli_fetch_assoc($selected_items_result)) {

            $item_id = $row['item_id'];
            $item_location_id = $row['item_location_id'];
            $item_number = $row['item_number'];
            $item_name = $row['item_name'];
            $item_description = $row['item_description'];
            $item_storage = strtoupper($row['item_storage']);
            $item_inventory = $row['item_inventory'];

            echo "<tr>";

            echo    "<td>$item_location_id</td>";
            echo    "<td>$item_number</td>";
            echo    "<td>$item_name</td>";
            echo    "<td>$item_description</td>";
            echo    "<td>$item_storage</td>";
            echo    "<td><a href='users.php?source=edit_stock&i_id=$item_id'>Edit Stock</a></td>";
            echo    "<td>$item_inventory</td>";


            echo    "<td><input style='width: 50px;' type='number' name='adjust[][".$item_id."]' value='0' /></td>";


            echo    "</tr>";
          } // end while statement
        } // end else statement

      } // end $_GET['l_id']
    ?>

    </tbody>
  </table>
  <!-- <div class="form-item-special">
    <input class="colorize-button"
           type="submit" name="update_all_stock" value="Update All" />
  </div> -->
</form>

---

我已经为此工作了两个多星期，到处寻找答案。请帮忙

循环结束时，

$value

中有什么内容？在我看来，它似乎没有指定要更新的项id，因此它使用相同的值更新所有行，这是循环结束时

$value

保留的值，因为每次都会覆盖它

---

如果调整值不是零，为什么不在循环中运行查询？在中添加一些

echo

语句，以查看变量的值有助于调试。

注意$selected\u items\u id，这是sql注入漏洞

if(isset($_POST['update_all_stock'])) {
    $i = 0;
    foreach ($_POST['adjust'] as $key => $value) {
      $new_array = $_POST['adjust'];
      $value = $new_array[$key -= $i];
      $value = implode(",", $value);  

      $i ++;
    }
    $update_stock = "UPDATE items SET ";
    $update_stock .= "item_inventory = '". $value ."'";

    $update_stock_result = mysqli_multi_query($connection, $update_stock);

    if(!$update_stock_result) {
      echo "FAILED TO UPDATE STOCK ".mysqli_error($connection);
    }
  }