ReactPHP is a framework built on the reactor pattern, utilizing a single-threaded event loop to manage concurrent service requests. It includes various components such as event-driven, non-blocking I/O processes and performance benchmarks comparing PHP and Node.js applications. While it lowers bootstrapping costs and separates application code, it can be challenging to debug and has limited scalability.

1. ReactPHP - reaktor jądrowy w PHP
Krzysztof Korzeniewski
krzysiu@tsh.io

2. Reactor pattern
ReactPHP is based on the reactor pattern, hence the name. A
reactor system is always single threaded by definition and
uses an event loop to handle different kind of events.
Event handling pattern for handling service requests delivered
concurrently to a service handler by one or more inputs

3. - Resources
- Synchronous Event Demultiplexer
- Dispatcher
- Request / Event Handler

5. popen()
proc_open()
pcntl_fork()
stream_select() / stream_set_blocking()
curl_multi_select()
system(’sleep 1000 &’)
system(’screen -dm sleep 1000’)

6. Event-driven
Non-blocking I/O
Pure PHP
Native extensions

7. LibEventLoop - pecl libevent
LibEvLoop - pecl libev
ExtEventLoop - pecl event
StreamSelectLoop - stream_select()
EventLoop Component

8. Ticks
Timers
Streams
Promises
Filesystem - pecl eio -> libeio
Sockets
Socket client
Child processes
Components

9. app.php

10. app.js

11. Benchmark time !

12. ab -c 1000 -n 10000 http://127.0.0.1:1337/
php app.php
node app.js
hhvm app.php
0 2500 5000 7500 10000
1056
1288
2265
9471
7765
4426
requests / sec time taken (ms)
i7 2,4 GHz

13. Pros Cons
- difficult to debug
- limited scalability
- current version 0.4.1
- separates app code
- lowers bootstraping costs

14. More ?
Pattern-oriented software architecture. 2, Patterns for
concurrent and networked objects / Douglas Schmidt
https://www.youtube.com/watch?v=lnQeiY_BoeQ
http://blog.wyrihaximus.net/tags/reactphp/
Cees-Jan Kiewiet

15. #AMA