<?php
$dsn = 'mysql:dbname=cheyun_cms;host=127.0.0.1';
$user = 'root';
$password = '111111';
//采用预处理+事务处理执行SQL操作
//1.连接数据库
try {
  $pdo = new PDO($dsn, $user, $password);
  $pdo->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
  die("数据库连接失败".$e->getMessage());
}
//2.执行数据操作
try{
  //开启事物,此时会关闭自动提交
  $pdo->beginTransaction();
  $sql = "insert into cy_log (logid, value, action, file) values (?, ?, ?, ?)";
  $stmt = $pdo->prepare($sql);
  //传入参数
  $stmt->execute(array(null,"test4","w",11));
  $stmt->execute(array(null,"test5","w",11));
  $stmt->execute(array(null,"test3","w",11));
  //提交事物，并且 数据库连接返回到自动提交模式
  $pdo->commit();
}catch(PDOException $e){
  echo '执行失败'.$e->getMessage();
  //如果数据库被设置成自动提交模式，rollback 在回滚事务之后将恢复自动提交模式。
  //包括 MySQL 在内的一些数据库， 当在一个事务内有类似删除或创建数据表等 DLL 语句时，会自动导致一个隐式地提交。
  //隐式地提交将无法回滚此事务范围内的任何更改。即 DDL 语句无法回滚
  $pdo->rollback();
}

<?php
$dsn = 'mysql:dbname=cheyun_cms;host=127.0.0.1';
$user = 'root';
$password = '111111';
//采用预处理+事务处理执行SQL操作
//1.连接数据库
try {
  $pdo = new PDO($dsn, $user, $password);
} catch (PDOException $e) {
  die("数据库连接失败".$e->getMessage());
}
//2.执行数据操作
//开启事物
$pdo->beginTransaction();
$sql = "insert into cy_log (logid, value, action, file) values (?, ?, ?, ?)";
$stmt = $pdo->prepare($sql);
$datalist = array(
  array(null,"test9","w",11),
  array(null,"test10","w",11),
  array(null,"test11","w",11)
);
//是否提交标志位
$isCommit = true;
foreach($datalist as $data){
  $stmt->execute($data);
  if($stmt->errorCode()>0){
    //回滚
    $pdo->rollback();
    $isCommit = false;
    break;
  }
}
if($isCommit){
  //提交事物
  $pdo->commit();
}