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I need to save files with non-latin filenames on a filesytem, using PHP.
I want to make this work cross-platform. How do I know what encoding I can use to write the file? I understand many modern filesystems are UTF-8 based (is this correct?), but I doubt Windows XP is (for instance).
So, is there a robust detection mechanism?
Not an answer to your question, but if you don’t need to do extensive operations on filesystem level (like searching, sorting…), there is a nice cross-platform workaround for the issue outlined in this SO question:
URLEncode()ing file names.gets turned into
which should be safe to use in any filesystem and is able to map any UTF-8 character.
I find this much preferable to trying to “natively” deal with the host OS’s capabilities, which is guaranteed to be complicated and error-prone (in addition to operating system differences, I’m sure the various filesystem formats – FAT16, FAT32, NTFS, extFS versions 1/2/3…. bring their own set of rules to be aware of.)