如何在下面的代码中将object转换为MySQLi？

$mysqli = new mysqli("localhost", "username", "password", "database");

$result = $mysqli->query($sql);

$mysqli = new mysqli("localhost", "username", "password", "database");

// 检查连接是否成功
if ($mysqli->connect_errno) {
    echo "连接数据库失败：" . $mysqli->connect_error;
    exit();
}

// 构建SQL查询语句
$sql = "SELECT * FROM table_name";

// 执行查询
$result = $mysqli->query($sql);

// 处理查询结果
if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        // 处理每一行数据
        echo "ID: " . $row["id"] . ", Name: " . $row["name"] . "<br>";
    }
} else {
    echo "没有结果";
}

// 关闭连接
$mysqli->close();