PHP,PDO和例外

Question

我目前处于PDO的两难境地.我最近转而使用自己的自定义数据库类,因为我想利用事务.我面临的问题是如何从已经用try/catch for PDO包装的代码块中抛出异常.这是一个例子......

try {
    // PDO code

    // Transaction start

    // Throw manual exception here if error occurs (transaction rollback too)

   // Transaction commit

} catch (PDOException $e) {
    // Transaction rollback
    // Code to handle the exception
}

以上面的代码示例为例,记住PHP手册说的; "你不应该从你自己的代码中抛出PDOException".我如何处理自己的异常和 PDO 异常？某种筑巢？

Answer 1

try {
    // PDO code

    // Transaction start

    // Throw manual exception here if error occurs (transaction rollback too)
    throw new MyException("all went tits up");

   // Transaction commit

} catch (PDOException $e) {
    // Transaction rollback
    // Code to handle the exception
} catch (MyException $e) {
    // Transaction rollback
    // Code to handle the exception   
}

问题是,你将会有重复的代码,它们闻起来不太好.我建议只捕捉"例外",例如:

try {
    // PDO code

    // Transaction start

    // Throw manual exception here if error occurs (transaction rollback too)
    throw new MyException("all went tits up");

   // Transaction commit

} catch (Exception $e) {
    // Transaction rollback
    // Code to handle the exception
}