$User->startTrans()

$User->commit()

$User->rollback()

// 在User模型中启动事务
$User->startTrans()
// 进行相关的业务逻辑操作
$Info = M("Info"); // 实例化Info对象
$Info->save($User); // 保存用户信息
if (操作成功){
  // 提交事务
  $User->commit()
}else{
  // 事务回滚
  $User->rollback()
}

<?php
namespace SMS\Controller;
use Think\Controller;
class IndexController extends Controller {
  public function index(){
    $data['operator'] = 'Testss';
    M()->startTrans();
    $result = M('feehistory')->add($data);
    $result1 = $result2 = true;
    if(!empty($result)){
      $regdelData['level'] = '111';
      $result1 = M('regdel')->add($regdelData);
      $regData['level'] = '101';
      $result2 = M('reg')->where("registryCode='13693536752-SJB-HUAX-12345678'")->save($regData);
    }
    if(!empty($result) && !empty($result1) && !empty($result2) ){
      M()->commit();
      //$this->success('事物提交',__ROOT__);
      echo '事物提交';
    }else{
      M()->rollback();
      //$this->error('事物回滚',__ROOT__);
      echo '事物回滚';
    }
  }
}