I've yet to see a single, practical, simple end-to-end tutorial published for free (like the vast majority of the "rubbish" ones) that even uses SPL. Of course,

I've yet to see a single, practical, simple end-to-end tutorial published for free (like the vast majority of the "rubbish" ones) that even uses SPL. Of course, I see snippets here and there of the iterator et al. But nothing comprehensive. Forget a full on forum, if someone took the time to use best practices to build a MVC/P app as a reference, there would be plenty adopters. I don't mean something that "hides" work, I.E. A framework like Code Igniter. These just introduce more magic into code that doesn't actually teach the why and how.