If people are capable of sitting down and reading that endless ramble of function lists and php specs, they are more patent than i.
As a few people have said, Play with the code, php is very flexable, and has very good error reporting so its easy to find when you go wrong.
My suggestion is do what you want to do and google up what ever function you need when you need it, chances are you will get the manual, althogh sometimes there are even simpler and better explained tutorals "/
Plus most the time u will get functions with names nothing like what the function actaly does for a purpose, so the google helps "/
Personly i think i learnt most of php from installing Hacks on me forum, and basicaly looking at the sorce code and trying to figure out exsactly whats going on "/
If you prefer tutorals, probaly better idea to just get a book "/