#69 Help with code completion

[Igor Ryzhkov]

Hello everybody!
I'm new to emacs but working hard to learn it.
I'm trying to understand how code completion works in php-mode. (php-mode is already installed and working on my machine)

I've downloaded many html files from php.net and put it in my .../emacs/php_manual directory,
I've set php-manual-path to it (without closing slash?)

But how do I use it? Should I create TAGS file?
I've found M-/ but I think it's not it (it doesn't know a lot of functions)

And another question:
Is it possible to have PHP code completion like in this video: http://www.youtube.com/watch?v=vOj7btx3ATg (at least that pop-up suggestion box? )

Thank for your answers in advance!