什么时候应该使用intval和何时int [英] When should one use intval and when int

问题描述

有什么更好的选择:

// Option 1:
$intValue = (int) $numericValue;

// Option 2:
$intValue = intval($numericValue);

这两行之间是否有区别，在哪种情况下应使用哪一个?

Is there any difference between these two lines, and which should be used in which situation?

推荐答案

1. intval比强制转换为int慢(这是一个函数)
如果
2. intval的第一个参数是字符串，则可以接受它.

1. intval is slower than casting to int (it's a function)
2. intval can accept a base if its first parameter is a string

由于第二项确实很晦涩，因此客观上我们应该说intval简直是更糟".

Since the second item is really obscure, objectively we should say that intval is simply "worse".

但是，个人而言，我喜欢阅读intval($var)胜过(int)$var(后者可能还需要包装其他括号)，并且由于如果您要在循环内转换为int，您肯定做错了什么，我使用intval.

However, personally I like reading intval($var) better than (int)$var (the latter may also require wrapping in additional parens) and since if you are converting to int inside a loop you are definitely doing something wrong, I use intval.

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