There's amphp[1], and a community effort to make the different sync frameworks interoperable[2]. 1: http://amphp.org/ http://amphp.org/ 2: https://github.com/

There's amphp[1], and a community effort to make the different sync frameworks interoperable[2]. 1: http://amphp.org/ http://amphp.org/ 2: https://github.com/async-interop https://github.com/async-interop