(PHP 5 >= 5.2.0, PHP 7, PHP 8)
ArrayIterator::uasort — Sort with a user-defined comparison function and maintain index association
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,那么它们在排序数组中的相对顺序是未定义的。
Always returns true
.