Modern PHP - New Features and Good Practices

I kind of already knew a lot of the stuff in it, so I didn't get as much out of it as I wanted. If I'd picked it up before I went to a few SunshinePHP conferences, though, it would have melted my brain. If you're a PHP dev in the procedural PHP world or making the same old wordpress theme again and again, pick it up and catch up quickly with this book.