[ 源代码： amphp-amp ]
软件包：php-amphp-amp（2.6.2-1.1）
Non-blocking concurrency framework for PHP
Amp is a non-blocking concurrency framework for PHP. It provides an event loop, promises and streams as a base for asynchronous programming.
Promises in combination with generators are used to build coroutines, which allow writing asynchronous code just like synchronous code, without any callbacks.