ArrayIterator::uksort

(PHP 5 >= 5.2.0, PHP 7)

ArrayIterator::uksort — Sort by keys using a user-defined comparison function

说明

public ArrayIterator::uksort ( callable $cmp_function ) : void

This method sorts the elements by keys using a user-supplied comparison function.

Note:

If two members compare as equal, their relative order in the sorted array is undefined.

参数

cmp_function

在第一个参数小于，等于或大于第二个参数时，该比较函数必须相应地返回一个小于，等于或大于 0 的整数。

callback ( mixed $a, mixed $b ) : int

返回值

没有返回值。

参见