Description:
------------
If I try to create a directory with UTF-8 characters the result is not as expected.

Expected folder name: Яндекс
Actual result: Яндекс

Even scandir doesn't understand UTF-8 folder- and filenames in PHP 7.
How to handle such files with PHP 7?

PHP version: 7.1.0-dev (Windows)

Test script:
---------------
<?php
mkdir(__DIR__ . '/Яндекс'); 
print_r(scandir(__DIR__));


Expected result:
----------------
Array
(
    [0] => .
    [1] => ..
    [2] => Яндекс

Actual result:
--------------
Array
(
    [0] => .
    [1] => ..
    [2] => ð»ð¢ð┤ðÁð║Ðü