PerlIO::encoding(3)	Perl Programmers Reference Guide     PerlIO::encoding(3)

NAME
     PerlIO::encoding - encoding layer

SYNOPSIS
       use PerlIO::encoding;

       open($f, "<:encoding(foo)", "infoo");
       open($f, ">:encoding(bar)", "outbar");

       use Encode qw(:fallbacks);
       $PerlIO::encoding::fallback = FB_PERLQQ;

DESCRIPTION
     This PerlIO layer opens a filehandle with a transparent encoding filter.

     On input, it converts the bytes expected to be in the specified character
     set and encoding to Perl string data (Unicode and Perl's internal Unicode
     encoding, UTF-8).	On output, it converts Perl string data into the speci-
     fied character set and encoding.

     When the layer is pushed, the current value of $PerlIO::encoding::fallback
     is saved and used as the CHECK argument when calling the Encode methods en-
     code() and decode().

SEE ALSO
     open, Encode, "binmode" in perlfunc, perluniintro

perl v5.44.0			   2026-05-14		     PerlIO::encoding(3)