PDO::rollBack

(no version information, might be only in CVS)

PDO::rollBack --  Rolls back a transaction

Description

bool PDO::rollBack ( void )

警告

這個函數是實驗性質的。這個函數的行為、名稱、和關於此函數的任何其他文件在未來PHP的發行中可能會在不通知的情況下改變。 使用此延伸需自行承擔風險。

When issued against databases that support transactions, PDO::rollBack() rolls back any work in progress and and returns the connection state to autocommit mode.

You must issue PDO::beginTransaction() to set the connection state to manual commit mode before issuing PDO::rollBack() has any effect.

範例

範例 1. Roll back a transaction

<?php
/* Begin a transaction, turning off autocommit */
$dbh->beginTransaction();

/* Change the database schema and data */
$sth = $dbh->exec("DROP TABLE fruit");
$sth = $dbh->exec("UPDATE dessert
    SET name = 'hamburger'"
);

/* Recognize mistake and roll back changes */
$dbh->rollBack();

/* Database connection is now back in autocommit mode */
?>

參考

PDO::beginTransaction()
PDO::commit()