I’ve been programming since 2005, and doing PHP since circa 2006, WordPress circe 2010. I never received a formal education in programming so, while I don’t have school debt, I do have substantive gaps in my knowledge. Like a road with pot holes.
Recently, I’ve started a new company, wppluginco.com, and shifted back into programming. As I’ve dived back in I am being reminded of the pot holes never filled. I’ve noticed these things are common among developers who pre-date the online-interactive-classes that exist today, and lack a formal education. So I put together this list of what I’ve found to be the hardest things to comprehend and learn in PHP and will add notes as I settle my questions: