How to deal with encoding?

Question

Character encoding

Hello! It is necessary to migrate files, for this I read folders and files inside to create a "skeleton" of the transfer.
The original folders and files were in cracks. Translated them into a readable form:
convmv -rf cp1251 -t utf-8 --notest
Next, I get folders recursively, they are displayed in cracks, I fix them on the go. Next, I need to get files from this folder, and here is the problem. He sees files only in folders with an English name with a Russian name, he simply skips them, and he also skips Russian folders inside Russian ones. Checked is_dir - says false for Russian folders. I do not understand how I can achieve the correct encoding? It all happens on Windows. I know, in linux this would not be, but it is necessary on win.
iconv('windows-1251', 'utf-8', $str);

Answer 1

THE ANSWER IS NOT FOUND.
Put Homestead (Vagrant) and the problem was solved by itself.

Answer 2

Maybe try is_dir(iconv(...)) ?