为什么排序失败? [英] Why would sort fail?

问题描述

我正在编写一个库例程，该例程将对嵌套数组进行一些相当复杂的排序.

I'm writing a library routine, which among other things will do some rather complex sorting of nested arrays.

我从文档中看到，所有数组排序功能(包括使用内置比较器的功能)在失败时都可以返回false-但是什么时候会出现这种情况???

I see from the documentation that all the array sort function (including the ones using built-in comparators) can return false on failure - but when would this ever be the case???

推荐答案

当您发送给函数的变量是 NOT 数组时，它将失败. 示例:

It would fail when the variable you send to the function is NOT an array
Example:

asort('Hello');//fails
asort(array(1,2,35,7,2,8,3));//true

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