MySQLi-在bind_param之后声明变量? [英] MySQLi - declaring variable after bind_param?
问题描述
这可能是一个完全愚蠢的问题,但是我看到了几个示例,这些示例在将变量放入bind_param之后声明了这些变量:
http://devzone.zend.com/article/686
This may be a completely dumb question, but I've seen a couple examples declaring the variables AFTER putting them in bind_param:
http://devzone.zend.com/article/686
我以前从未见过这样做,而且我所有的编程知识都说我应该事先定义它们.这是有效/首选的方式吗?
I've never seen this done before and all my programming knowledge says I should define them before hand. Is this a valid/preferred way?
推荐答案
这是可能的,因为绑定的是对该问题的变量的引用,但我发现它的样式非常糟糕:
This is possible, because what gets bound is a reference to the variable in question, but I find it horribly bad style:
-
这使代码更难阅读,维护和调试-可以在行下甚至在绑定和查询之间调用的其他函数中更改变量.
It makes code harder to read, maintain and debug - the variable could be changed further down the line, or even in other functions called in between the binding and the query.
在声明变量之前将其绑定将引发(不,它不会.为@webbiedave干杯)E_NOTICE
消息
Binding a variable before declaring it will throw an (No it doesn't. Cheers @webbiedave)E_NOTICE
message
如果您问我,查询应该放在一个地方,然后立即执行,以备将来阅读.
If you ask me, a query should be built in one place, and then executed straight away, for the sake of future readability.
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