如何使用php更新插入后的房间状态

<?php
// 连接数据库
$servername = "数据库服务器地址";
$username = "数据库用户名";
$password = "数据库密码";
$dbname = "数据库名";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("连接数据库失败: " . $conn->connect_error);
}

// 更新房间状态
$roomId = 1; // 假设要更新的房间ID为1
$newStatus = "已入住"; // 假设要更新的房间状态为"已入住"

$sql = "UPDATE rooms SET status = '$newStatus' WHERE id = $roomId";

if ($conn->query($sql) === TRUE) {
    echo "房间状态更新成功";
} else {
    echo "房间状态更新失败: " . $conn->error;
}

$conn->close();
?>