> Help on the PHP side of things would be most appreciated, because that's
> the part I'm least familiar with.
SAPI/Embed in PHP is very experimental which means that it can be molded to
suit PL/PHP needs. To my knowlege its only used as a plugin for irssi (irc
client which you can script using PHP), and a very poorly implemented MySQL
module.
Anyway if you need any help with it just shout :)
Edin