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.IX Title "PerlIO::encoding 3perl"
.TH PerlIO::encoding 3perl 2023-11-30 "perl v5.38.2" "Perl Programmers Reference Guide"
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.SH NAME
PerlIO::encoding \- encoding layer
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 1
\&  use PerlIO::encoding;
\&
\&  open($f, "<:encoding(foo)", "infoo");
\&  open($f, ">:encoding(bar)", "outbar");
\&
\&  use Encode qw(:fallbacks);
\&  $PerlIO::encoding::fallback = FB_PERLQQ;
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
This PerlIO layer opens a filehandle with a transparent encoding filter.
.PP
On input, it converts the bytes expected to be in the specified
character set and encoding to Perl string data (Unicode and
Perl's internal Unicode encoding, UTF\-8).  On output, it converts
Perl string data into the specified character set and encoding.
.PP
When the layer is pushed, the current value of \f(CW$PerlIO::encoding::fallback\fR
is saved and used as the CHECK argument when calling the Encode methods
\&\fBencode()\fR and \fBdecode()\fR.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
open, Encode, "binmode" in perlfunc, perluniintro