It's very simple, but can be tricky

$_=q(JAPH : What a JAPH is? Is a "little" (or not) perl script
which prints "Just another Perl hacker" or "JAPH".
It could be very long and ofuscated :( or simple and easy
For example perl -e 'print "JAPH"' is the most basic JAPH.
We can find extremely difficult and ofuscated JAPH.
This is a game, is very funny, There is more than one way to do
it, so we can make infinites 'JAPH'. Go on! Make your Just
another Perl hacker and be the most original);
$_='JAPH';
print $_;
die "See you soon baby... $_";
die "Not dead $_?"=> $_= eval(23/0);    #Divide by cero
@data=<DATA>;
chomp @data; @data=map{eval}@data;
@data=grep{/JAPH/ or /Just another Perl hacker/}@data;
print join "\n",@data;
__END__
$_='Just another Perl Hacker';
$_=$|=$);
s, .*,,s,print;
[download]

Hopes