Quote

…You may (and usually should) use the three-argument form of open to specify I/O layers (sometimes referred to as "disciplines") to apply to the handle that affect how the input and output are processed (see open and PerlIO for more details). For example:

Code: (dl )

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 open(my $fh, "<:encoding(UTF-8)", "filename")
    || die "can't open UTF-8 encoded filename: $!";

opens the UTF8-encoded file containing Unicode characters;…