Perl for Newbies - Part 3 - Modules and ObjectsPerl ModulesLoading Modules and Importing their FunctionsUsing Variables from a Different Namespace

3.2.3. Using Variables from a Different Namespace

It is also possible to use the global variables of different packages. However, such variables need to be declared using the use vars qw($myvar1 @myvar2)construct.

Here's an example for a module that defines a variable and another one that access it:

# This file is MyVar.pm
#
package
 MyVar;

use strict;
use warnings;

# Declare a namespace-scoped variable named $myvar.
use vars
qw($myvar);

sub 
print_myvar
{

print
$myvar,
"
\n
";
}

1;
#!/usr/bin/perl

use strict;
use warnings;

use MyVar;

$
MyVar::
myvar =
"Hello";

MyVar::print_myvar();

$
MyVar::
myvar =
"World";

MyVar::print_myvar();

Written by Shlomi Fish