my @array;

&callaFunction();
&callaFunction();
&callaFunction();

foreach my $element ( @array ) {
  my %localHash = %{$element};
  # print %localHash's contents
}

sub callaFunction {
  my $hash = {}; 
  # fill $key and $value with some random info here
  $hash->{$key} = $value;
  push ( @array, $hash );
  # if you still need a global hash assign $hash to it here.
}