DB_common::commit()

<?php
// Once you have a valid DB object named $db...

$db->autoCommit(false);

$db->query('CREATE TABLE blah (a integer)');
$db->commit();

$db->query('INSERT INTO blah (a) VALUES (11)');

$res =& $db->query('SELECT a FROM blah');
if (DB::isError($res)) {
    echo $res->getMessage() . "\n";
}
while ($res->fetchInto($row, DB_FETCHMODE_ORDERED)) {
    echo $row[0] . "\n";
}
$res->free();

$db->query('DROP TABLE blah');
$db->commit();
?>