How to: Virtual Machines
*Alternative PHP virtual machines.*

* [Hack](https://hacklang.org/) - A programming language for HHVM.
* [HHVM](https://github.com/facebook/hhvm) - A Virtual Machine, Runtime and JIT for PHP by Facebook.
* [PeachPie](https://github.com/peachpiecompiler/peachpie) - PHP compiler and runtime for .NET and .NET Core.