[development] Eliminate hooks entirely in Drupal 6

[Fernando Silva]

On 1/25/07, Earl Miles <merlin at logrus.com> wrote:
> The main difference I can think of with a callback is a callback is generally
> specifically registered to one client or server, and a listener tends to be
> open to multiple clients. But I dunno what the official definitions might be,
> that's just a gut feeling I get from various things I've worked with over time.

http://www.helpqlodhelp.com/blog/archives/000047.html