In a recent post to the PHP-GTK Community site, there's a new presentation on code completion for PHP-GTK in Netbeans (illustrated here).

Jose Antonio Bayona Medina has put up a slideshow demonstrating how to use the basic technique outlined in this chapter to add PHP-GTK 2 autocompletion in Netbeans 6.7.

You can see the presentation in the post or head over to Slideshare and check out this and other presentations by Jose Antonio Bayona Medina about more PHP-GTK work and code completion.