my %hash =("var1", "info1", "var2", "info2", "var3", "info3");

##</code><code>##

if (grep {$_ eq $where} @array) {
  push @result_array, $hash{$where};
} else {
  push @result_array, $where;
}

##</code><code>##

push @result_array, $hash{$where} || $where;