Besides application frameworks and CMSs, we’ve also seen the rise of asynchronous frameworks the past years.
These are frameworks and servers, written in PHP or other languages, that allow users to run truly asynchronous PHP. A few examples include Swoole, Amp and ReactPHP.
There has also been talk on the internals mailing list — the place where core developers discuss the development of the language — to add #libuv to the core. For those unaware of libuv: it’s the same library Node.js uses to allow all its #asynchronicity.