how to detect encoding of uploaded csv file
As someone noticed in the PHP docs here:
If you try to use mb_detect_encoding() to detect whether a string is valid UTF-8, use the strict mode, it is pretty worthless otherwise.
So you should try using the true param when detecting encoding:
mb_detect_encoding($str, mb_detect_order(), TRUE);If you can predict some possible encodings, you can list them instead of using mb_detect_order().