mysqli::rollback

定义和用法

rollback() / mysqli_rollback() 函数回滚指定数据库连接的当前事务。

提示：还可以查看 commit() 函数，它提交当前事务；以及 autocommit() 函数，它开启或关闭自动提交数据库修改。

实例

例子 1 - 面向对象风格

关闭自动提交，执行一些查询，提交查询，然后回滚当前事务：

<?php
$mysqli = new mysqli("localhost","my_user","my_password","my_db");

if ($mysqli -> connect_errno) {
  echo "Failed to connect to MySQL: " . $mysqli -> connect_error;
  exit();
}

// 关闭自动提交
$mysqli -> autocommit(FALSE);

// 插入一些值
$mysqli -> query("INSERT INTO Persons (FirstName,LastName,Age)
VALUES ('Peter','Griffin',35)");
$mysqli -> query("INSERT INTO Persons (FirstName,LastName,Age)
VALUES ('Glenn','Quagmire',33)");

// 提交事务
if (!$mysqli -> commit()) {
  echo "Commit transaction failed";
  exit();
}

// 回滚事务
$mysqli -> rollback();

$mysqli -> close();
?>

例子 2 - 过程式风格

关闭自动提交，执行一些查询，提交查询，然后回滚当前事务：

<?php
$con=mysqli_connect("localhost","my_user","my_password","my_db");

if (mysqli_connect_errno()) {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
  exit;
}

// 关闭自动提交
mysqli_autocommit($con,FALSE);

// 插入一些值
mysqli_query($con,"INSERT INTO Persons (FirstName,LastName,Age)
VALUES ('Peter','Griffin',35)");
mysqli_query($con,"INSERT INTO Persons (FirstName,LastName,Age)
VALUES ('Glenn','Quagmire',33)");

// 提交事务
if (!mysqli_commit($con)) {
  echo "Commit transaction failed";
  exit();
}

// 回滚事务
mysqli_rollback($con);

// 关闭连接
mysqli_close($con);
?>