It's been a long time since I wrote any PHP in anger but back when I did, I got a ton of mileage out of CodeIgniter (https://codeigniter.com/). It looks like it's still around and being actively maintained. I can quite clearly remember a number of projects that went from being just an idea to 90% functional in the span of an evening.
I write Python almost exclusively now, but still pine for something like CodeIgniter. Flask is nice because it lets you bolt on whatever you want, but you spend a lot of time choosing, prototyping, and often discarding libraries. Django does a lot of heavy lifting but has (IMO) a very steep learning curve. There doesn't seem to be anything (or at least anything I've liked) in between.