Another suggestion. Use PerlIO::Util's tee layer: 

#!/usr/bin/perl
use strict;
use warnings;

use PerlIO::Util;

*STDOUT->push_layer(tee => \my $capture_buf);

print "hello world\n";

print STDERR "captured STDOUT: '$capture_buf'";

__END__
$ ./819527.pl
hello world
captured STDOUT: 'hello world
'

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In reply to Re: Copy contents of STDOUT by almut
in thread Copy contents of STDOUT by perl_is_fun

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