Such as: 
use strict;

{
  package Foo;
  our $str = 'foo str';
}

{
  package Bar;
  our $str = 'bar str';
}


my $class = 'Foo';

# access Foo::str using soft ref
my $value;
{
  no strict 'refs';
  my $soft = $class.'::str';
  $value = $$soft;
}
# So, how to get $Foo::Str without soft ref?

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Moreover, how to know whether an arbitrary package has a specific global?

In reply to How to access globals in arbitrary classes, without using soft ref? by llancet

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