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PDO :: FETCH_CLASS模式可以用于一行（不是fetchAll）吗？

[英]Can PDO::FETCH_CLASS mode be used for one row (not fetchAll)?

原文 2014-10-23 15:05:23 3 1 php/ mysql/ pdo

I feel a little dirty asking this here, since I feel I should've just been able to Google it, but well... I didn't find anything. 我在这里问这个问题有点不高兴，因为我觉得我应该已经可以用Google了，但是...我什么都没找到。

Is there a way to use the fetchmode PDO::FETCH_CLASS in the normal fetch function? 有没有办法在正常的fetch功能中使用fetch模式PDO::FETCH_CLASS ？ I want to retrieve a single row, so using fetchAll is out of the question (performance issues). 我想检索一行，所以使用fetchAll是fetchAll的（性能问题）。

I know I could use setFetchMode(PDO::FETCH_CLASS, "MyClass") , but ideally I would prefer not to change the default fetch mode. 我知道我可以使用setFetchMode(PDO::FETCH_CLASS, "MyClass") ，但理想情况下，我不希望不更改默认的获取模式。 I realise that I could always manually set it back to PDO::FETCH_BOTH afterwards, but it's not quite as neat as I'd like (extra function calls, code clutter, etc.). 我意识到，以后我总是可以手动将其设置回PDO::FETCH_BOTH ，但是它不像我想要的那样整洁（额外的函数调用，代码混乱等）。

If it isn't possible or the extra function calls don't matter at all that is fine too. 如果不可能，或者额外的函数调用也没有关系，那也没关系。 I was just wondering since it seems such an obvious thing to want to do. 我只是想知道，因为似乎很想做。

PS PDO::fetch() does seem to accept PDO::FETCH_CLASS as it's first argument, but I can't find a way to pass the class-identifier string in... PS PDO::fetch()似乎确实接受PDO::FETCH_CLASS作为它的第一个参数，但是我找不到在...中传递类标识符字符串的方法。

1 个解决方案

The answer seems to be no. 答案似乎是否定的。 No there is no such function. 不，没有这样的功能。

Use either setFetchMode(PDO::FETCH_CLASS, "MyClass") with your statement, or use fetchAll((PDO::FETCH_CLASS, "MyClass") . 在您的语句中使用setFetchMode(PDO::FETCH_CLASS, "MyClass") ，或使用fetchAll((PDO::FETCH_CLASS, "MyClass") 。