PDO事务管理DEMO

try {
    $dsn = "mysql:host=127.0.0.1;port=3306;dbname=dab"; 
    $pdo = new PDO($dsn, 'root', '');
    $pdo -> setAttribute(PDO::ATTR_AUTOCOMMIT, false);
    $pdo -> beginTransaction();
    $sql = "update DAB_NTOS_ADMIN set name = :name where id = :id";
    $sth = $pdo->prepare($sql);
    $sth ->bindValue(':name', 'KILL');
    $sth ->bindValue(':id', 3);
    $flag = $sth-> execute(); // true or false
    echo $flag;
    $pdo -> commit();
} catch (Exception $e) {
    if ($pdo) $pdo -> rollBack();
} finally { 
    $pdo = null;
}

* finally在php5.5支持，老版本不支持