The book that worked for me is Professional PHP5 (Programmer to Programmer) by Edward Lecky-Thompson, Heow Eide-Goodman, Steven D. Nowicki, Alec Cove The authors mainly talk about the architecture of apps and OOP: not about "how to create an app that will do something" but rather about "what is the right way to create an app that will do something". I've been in php programming business for years already but I still like to open this book from time to time and read it PS. Keep in mind that it is a rather advanced book, you may find it hard if you are still not 100% comfortable with php basics.
Here's a good online one in case you haven't seen it. Quite a bit of advanced topics: http://www.tuxradar.com/practicalphp
I think it would help if you defined exactly what "Advanced PHP" means to you. It could mean anything from "how to manage loops" to "how to programmatically build an artificial intelligence algorithm" depending on the person asking.