#!/usr/bin/perl

use strict;
use warnings;

my $regex = qr/(foo)(bar)(foo)/;
my $hit = 2; # geht natürlich nicht

# mehr Code
my $bla = "foobarfoo";

if($bla =~ m/$regex/){
   no strict 'refs';
   print ${$hit};
}

#!/usr/bin/perl

use strict;
use warnings;

my $regex = qr/(foo)(bar)(foo)/;
my $hit = 2; # geht natürlich nicht

# mehr Code
my $bla = "foobarfoo";

if(my @array = $bla =~ m/$regex/){
   print $array[$hit-1];
}