### 事务 ~~~ /** * 事务处理 */ public function transaction() { $sql = "insert into aa_user(username) values ('aaphp')"; $database = new Database(); $result = $database->beginTransaction(); if ($result) { echo '开启事务成功<br/>'; } else { echo '开启事务失败<br/>'; } $database->execute($sql); if (false) { $result = $database->rollback(); if ($result) { echo '事务回滚成功<br/>'; } else { echo '事务回滚失败<br/>'; } } else { $result = $database->commit(); if ($result) { echo '事务提交成功<br/>'; } else { echo '事务提交失败<br/>'; } } } ~~~