ArrayIterator::uasort

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

ArrayIterator::uasort — Sort with a user-defined comparison function and maintain index association

说明

public ArrayIterator::uasort(callable $callback): bool

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

注意:
如果两个成员完全相同，那么它们将保持原来的顺序。在 PHP 8.0.0 之前，它们在排序数组中的相对顺序是未定义的。

参数

callback: 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

总是返回 true 。

参见

ArrayIterator::asort() - Sort entries by values
ArrayIterator::ksort() - Sort entries by keys
ArrayIterator::natcasesort() - Sort entries naturally, case insensitive
ArrayIterator::natsort() - Sort entries naturally
ArrayIterator::uksort() - Sort by keys using a user-defined comparison function
uasort() - 使用用户自定义的比较函数，保持索引和值的对应关系，原地排序 array。

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