如何使用php更改mysqli中字段值的位置？

<?php
// 连接到MySQL数据库
$conn = mysqli_connect("localhost", "username", "password", "database");

// 执行查询语句
$result = mysqli_query($conn, "SELECT * FROM table");

// 获取查询结果的关联数组
$row = mysqli_fetch_assoc($result);

// 修改字段值的位置
$newRow = array();
$newRow['field2'] = $row['field2'];
$newRow['field1'] = $row['field1'];
$newRow['field3'] = $row['field3'];

// 更新数据库
mysqli_query($conn, "UPDATE table SET field1 = '{$newRow['field1']}', field2 = '{$newRow['field2']}', field3 = '{$newRow['field3']}'");

// 关闭数据库连接
mysqli_close($conn);
?>