Another possible solution I prefer is to avoid having variables in the required script 
# main script
require "conf.pl";
my $conf = get_conf();
print $conf->{foo};
...
# conf.pl
sub get_conf {
  { foo => "bar", color => "red" }
}
1;

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In reply to Re: Require Centralized Variables by axelrose
in thread Require Centralized Variables by mhorner

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