php readdir problem with japanese language file name

Question

I have the following code

Answer 1

As @bobince mentioned, PHP returns filenames in the specified encoding for System Locale, which is used by non-Unicode aware applications. If the character doesn't exist in the current system encoding, the filename will contain '?' instead and will not be accessible.

You can try installing php-wfio.dll at https://github.com/kenjiuno/php-wfio, and refer to files via the wfio:// protocol.