Disclaimer: I'm by no means an LDAP guru, but I've read up on it.

Net::LDAP and Mozilla::LDAP both seem to store entry values in anonymous arrays. (A DN can have multiple values, like in the 'phones' field.) My documentation suggests $entr->get(), but doesn't mention that that returns the anonymous array.

In any case, I suspect something like:

($phone) = @{ $entr->get('telephoneNumber') };
($user) = @{ $entr->get('cn') };
($email) = @{ $entr->get('mail') };
[download]

would do more what you want. Another approach would be to add $phone = $phone->[0]; after the get() call.