async php 

thanks sunshine 

thanks silverstripe 

story 'me 

you can write async code 

spreading work to other threads 

forking 

$pid = pcntl_fork(); if ($pid) { // you're in the parent process pcntl_waitpid($pid, $status, WUNTRACED); if ($status > 0) { // handle the error } } else { // do something in the child process if ($failed) { exit(1); } exit(0); } 

php.net/manual/en/book.pcntl.php 

leanpub.com/signalingphp 

threading 

class MyThread extends Thread { public $hasLicense = null; private $repository; public function __construct($repository) { $this->repository = escapeshellarg($repository); } public function run() { $folder = hash("sha256", $this->repository); exec("git clone " . $this->repository . " " . $folder); chdir(__DIR__ . "/" . $folder); $this->hasLicense = preg_grep("/^LICENSE/i", glob("*")); } } 

$thread = new MyThread("[email protected]:php/php-src.git"); if ($thread->start()) { $thread->join(); // do something with $thread->hasLicense } 

php.net/manual/en/book.pthreads.php 

pthreads.org 

spreading the work to other machines 

message queues 

$pheanstalk = new Pheanstalk\Pheanstalk("127.0.0.1"); $pheanstalk->useTube("sunshine")->put("a message"); // some time later... $message = $pheanstalk->watch("sunshine")->reserve(); $pheanstalk->delete($message); 

$context = new ZMQContext(); $socket = new ZMQSocket($context, ZMQ::SOCKET_PUSH); $socket->connect("tcp://127.0.0.1:5555"); $socket->send("a message"); // some time later $socket = new ZMQSocket($context, ZMQ::SOCKET_PULL); $socket->bind("tcp://127.0.0.1:5555"); $message = $socket->recv(); 

you can also use rabbit mq, amazon sqs, and iron mq 

gearman 

$client = new GearmanClient(); $client->addServer("127.0.0.1", 4730); $client->setCompleteCallback(function(GearmanTask $task) { // so domething when the task is complete }); $task = $client->addTask("inspect", "some data"); $client->runTasks(); 

$worker = new GearmanWorker(); $worker->addServer("127.0.0.1", 4730); $worker->addFunction("inspect", function(GearmanJob $job) { // do the job, with $job->workload() }); while ($worker->work()) { if ($worker->returnCode() !== GEARMAN_SUCCESS) { // something went wrong } } 

php.net/manual/en/book.gearman.php 

async standard library 

amphp, icicle, react... 

explicit event loops 

use Icicle\Http\Message\BasicResponse; use Icicle\Http\Message\Request; use Icicle\Http\Server\RequestHandler; use Icicle\Socket\Socket; use Icicle\Stream\MemorySink; class MyRequestHandler implements RequestHandler { public function onRequest(Request $request, Socket $socket): Generator { $stream = new MemorySink(); yield from $stream->end("hello world"); yield new BasicResponse(200, [ "Content-Type" => "text/plain", "Content-Length" => $stream->getLength(), ], $stream); } public function onError(int $code, Socket $socket): Generator { yield new BasicResponse($code); } } 

use Icicle\Http\Server\Server; use Icicle\Loop; $server = new Server(new MyRequestHandler()); $server->listen(81, "127.0.0.1"); $server->listen(82, "127.0.0.1"); Loop\run(); 

server { listen 80; server_name acme.com; location / { proxy_set_header X-Real-IP $remote_addr; proxy_set_header Host $http_host; proxy_pass http://127.0.0.1:81; } } 

use Icicle\Http\Message\Request; use Icicle\Http\Message\Response; use Icicle\Socket\Socket; use Icicle\WebSocket\Application; use Icicle\WebSocket\Connection; use Icicle\WebSocket\Message; class MyApplication implements Application { public function onHandshake(Response $response, Request $request, Socket $socket): Generator { yield $response; } public function onConnection(Connection $connection): Generator { $iterator = $connection->read()->getIterator(); while (yield $iterator->isValid()) { // $iterator->getCurrent() + $connection->send(new Message()) } $connection->close(); } } 

use Icicle\Http\Message\BasicResponse; use Icicle\Http\Message\Request; use Icicle\Http\Server\RequestHandler; use Icicle\Socket\Socket; use Icicle\WebSocket\Application; use Icicle\WebSocket\Server\Server; class MyRequestHandler implements RequestHandler { private $application; public function __construct(Application $application) { $this->application = $application; } public function onRequest(Request $request, Socket $socket): Generator { yield $this->application; } public function onError($code, Socket $socket): Generator { yield new BasicResponse($code); } } $server = new Server(new MyRequestHandler(new MyApplication())); 

1. corou'nes 2. promises + observables 3. streams 4. filesystem 5. dns 6. threading + forking 

icicle.io/docs 

examples 

github.com/asyncphp 

why [i think] you should try async 

value for you 

value for the community 

I don't get why people can't deal with async environments. Cause, for me, it's like the dream. — @dead_lugosi 

want to know more about this stuff? 

assertchris.io/asyncphp 

If I said to you in 2000 that one day PHP would have any kind of strict mode, you would have laughed in my face. 

It isn't the year 2000 any more ... it's nature is, to a large degree, dictated by RFCs that pass the vote ... 

And while you will hear people use it's nature to argue against certain features, those voices aren't enough to stand in the way of progress. — @krakjoe 

joind.in/talk/84ad6 

thanks! twi$er.com/assertchris