$transaction = Yii::app()->db->beginTransaction(); //创建事务$transaction->commit(); //提交事务$transaction->rollback(); //回滚事务// 以下实例将需要事务处理的操作放进try里$transaction = Yii::app()->db->beginTransaction();try {$a = XXX::model()->findByPk(X);$a->x = 1;$a->update();$b = YYY::model()->findByPk(Y);$b->y = 2;$b->update();$transaction->commit(); //提交事务会真正的执行数据库操作} catch (Exception $e) {$transaction->rollback(); //如果操作失败, 数据回滚}