As long as I have you here... ;) I primarily write JS for a living but because I freelance I often have to work with wordpress. After spending a few weeks digg

As long as I have you here... ;) I primarily write JS for a living but because I freelance I often have to work with wordpress. After spending a few weeks digging into the internals I soon realized that every single wordpress project I've inherited–paid themes included–were horrendous and failed to utilize the most basic facilities provided by core. In most of these projects a quick turnaround was more important than clean code (probably the cause of the aforementioned horrendous codebases), so I always just hacked away at the templates without every trying to gain a deep understanding of PHP, its recommended best practices, and security gotchas. My question is, can you point me towards something like "PHP, the good parts"? I would like to know how to write well architected, performant, and secure PHP on the occasions I need to use it professionally. I know that PHP has a reputation as being dangerous by default, so knowing what not to do would be reassuring. So far all of the PHP books I've found have been fairly disappointing; covering all of the features without really detailing any best practices or opinions.