I'm looking for a book or some lessons on taking my php programming to the next level. I've skimmed through all the ebooks on PHP I can find and can't seem to find what I'm looking for. I've been trying to analyze some nice apps like Gallery and PHPBB but I find myself getting lost in the code. The ebooks I have don't seem to touch on the advanced techniques of these apps.
My current goal is creating an installer for a small app I'm writing that does all the check I need it to do and setup the database and config file. I'm just currently not at a level where I can break down how Gallery and PHPBB installers function so I can apply the appropriate pieces to my app.
So to sum it up. I'm looking for advice on how I transition from beginner php programming to intermediate and advanced programming.
These books don't seem to do it for me.
PHP 5 Advanced; Larry Ullman
earning PHP and MySQL, Second Edition; Michele E. Davis, Jon A. Phillips (O'Reilly, 2007)
Build Your Own Database Driven Website Using PHP and MySQL, Third Edition; Kevin Yank (SitePoint, 2004)