Air - hot reloads when a watched file changes.
I’ve been very happy with Air - https://github.com/cosmtrek/air
Just to add to the list there is also https://github.com/cosmtrek/air
I've also used Air[0] (and before that Gin) which says is for Go programs but lets you configure the commands and filters to work with any language/build.
I've been using https://github.com/cosmtrek/air
The Go compiler is really fast, effectively hot-reloads on every save.
> After updating your code, you can just reload the page. That's it. It's seamless.
This is available with many other languages as well, i.e. https://github.com/cosmtrek/air
It may require an external tool, but the deployment experience is a lot simpler for Go than PHP.