File::BOM provides get_encoding_from_filehandle and get_encoding from_stream to identify the encoding of Unicode files. Example:

use File::BOM qw( :all );
open $fh, '<', $filename;
my ($encoding) = get_encoding_from_filehandle($fh);

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In reply to Re: How do I determine encoding format of a file ? by idsfa
in thread How do I determine encoding format of a file ? by donno20

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