$::i       # implicit, 
$main::i   # explicit

##</code><code>##

#!/usr/bin/perl -w

use strict;

my @array = qw(one two three);

&one;

sub one { 
  local $::i;
  foreach $::i(@array) {
    &two;
  }
}

sub two {
  print "$::i\n";
}

##</code><code>##

#!/usr/bin/perl -w

use strict;

my @array = qw(one two three);

one();

sub one { 
  foreach (@array) {
    two($_);
  }
}

sub two {
  print "$_[0]\n";
}