ArrayIterator::uasort

(PHP 5 >= 5.2.0, PHP 7)

ArrayIterator::uasortSort with a user-defined comparison function and maintain index association

说明

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

This method sorts the elements such that indices maintain their correlation with the values they are associated with, using a user-defined comparison function.

Note:

如果两个成员完全相同,那么它们在排序数组中的相对顺序是未定义的。

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。注意:在 PHP 7.0.0 之前的版本中,整数的区间为 -2147483648 to 2147483647。

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

返回值

没有返回值。

参见

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