package MyModule2;

use strict;
use Exporter;
use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);

$VERSION     = 1.00;
@ISA         = qw(Exporter);
@EXPORT      = ();
@EXPORT_OK   = qw(func3 func4);
%EXPORT_TAGS = ( DEFAULT => [qw(&func3)],
                 All    => [qw(&func3 &func4)]);

my $myscalar = "MyScalarValue";

sub func3  {
   my $x;
   my $y;
   printf "MyModule2/func3: >%s<\n",$_[0];
   $x = eval "$_[0]";
   return $x;
}

sub func4  {
   my $x;
   my $y;
   printf "MyModule2/func4: >%s<\n",$_[0];
   $x = eval "$_[0]";
   $y = $myscalar;
   return $x;
}

1;

##</code><code>##

#!/usr/bin/perl -w

use strict;

use MyModule2 qw(:All);

printf "MyScript2/func3: >%s<\n",func3('$myscalar');
printf "MyScript2/func4: >%s<\n",func4('$myscalar');

##</code><code>##

perl MyScript2.pl
MyModule2/func3: >$myscalar<
Use of uninitialized value in printf at MyScript2.pl line 7.
MyScript2/func3: ><
MyModule2/func4: >$myscalar<
MyScript2/func4: >MyScalarValue<