mysqli 事务

<?php
$host = 'localhost';
$user = 'username';
$password = 'password';
$database = 'database_name';

// 创建连接
$conn = new mysqli($host, $user, $password, $database);

// 检查连接
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 开始事务
$conn->begin_transaction();

try {
    // 执行 SQL 语句
    $sql1 = "UPDATE accounts SET balance = balance - 100 WHERE id = 1";
    $sql2 = "UPDATE accounts SET balance = balance + 100 WHERE id = 2";

    if ($conn->query($sql1) === TRUE && $conn->query($sql2) === TRUE) {
        // 提交事务
        $conn->commit();
        echo "事务提交成功";
    } else {
        // 回滚事务
        $conn->rollback();
        echo "事务回滚";
    }
} catch (Exception $e) {
    // 发生异常时回滚事务
    $conn->rollback();
    echo "发生异常: " . $e->getMessage();
}

// 关闭连接
$conn->close();
?>