The following should work fine assuming there are no regular expressions, text assignments, etc. containing { or } inside the subs. With a little additional code (make a copy of the original text, remove harmful code, then search it and return sections of the original) this could be made to work for pretty much anything. Enjoy.

&get_subs('spider.pl', \@arr);
print @arr[0];

sub get_subs {
    my ($start, $n, $inp, $path, $p);
    $path = shift; $p = shift;

    open(INP, 'spider.pl') || die;
    $inp = ' ' . join('', <INP>);
    close(INP);

    while ($inp =~ /[\n ]sub[\n ]/g) {
        $start = pos($inp) - 4;
        $n = 1; pos($inp) = index($inp, '{', pos($inp)) + 1;
        while ($inp =~ /(}|{)/g) {
            if ($1 eq '}') { if (!(--$n)) { last; } }
            else { $n++; }
        }
        push(@$p, substr($inp, $start, pos($inp) - $start));
    }
}
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