use strict;
use warnings;

my $foo = 5;

print "Content-type: text/plain\n";
print "Content-disposition: inline; filename=foo.txt\n\n";

printf "Package: %s\n", __PACKAGE__;
printf "[%s] Before: %s\n", $$, $foo;
goodness(5);
printf "[%s] After: %s\n", $$, $foo;


}

sub goodness {
    my $val = shift;
    printf "[%s] goodness: %s\n", $$, $foo;
    $foo += $val;
[download]

Which Apache::Registry will turn into this:

package Apache::ROOTfoo_2ecom::test_2epl;
use Apache qw(exit);
sub handler {
#line 1 /www/foo.com/test.pl
use strict;
use warnings;

my $foo = 5;

print "Content-type: text/plain\n";
print "Content-disposition: inline; filename=foo.txt\n\n";

printf "Package: %s\n", __PACKAGE__;
printf "[%s] Before: %s\n", $$, $foo;
goodness(5);
printf "[%s] After: %s\n", $$, $foo;


}

sub goodness {
    my $val = shift;
    printf "[%s] goodness: %s\n", $$, $foo;
    $foo += $val;
}
[download]

By adding an extra '}' before the sub goodness declaration we are really closing sub handler {, and then at the end of the script we leave off the closing '}', since one will be added by Apache::Registry.