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.

Installation

This package can be installed as a Composer dependency.

composer require amphp/amp

Documentation

Documentation can be found on amphp.org as well as in the ./docs directory.

Requirements

• PHP 7.0+

Optional Extension Backends

Extensions are only needed if your app necessitates a high numbers of concurrent socket connections.

• ev
• event
• php-uv (experimental fork)

Examples

This simple example uses our Artax HTTP client to fetch multiple HTTP resources concurrently.

<?php

use Amp\Artax\Response;
use Amp\Loop;

require __DIR__ . '/../vendor/autoload.php';

Loop::run(function () {
    $uris = [
        "https://google.com/",
        "https://github.com/",
        "https://stackoverflow.com/",
    ];

    $client = new Amp\Artax\DefaultClient;
    $client->setOption(Amp\Artax\Client::OP_DISCARD_BODY, true);

    try {
        foreach ($uris as $uri) {
            $promises[$uri] = $client->request($uri);
        }

        $responses = yield $promises;

        foreach ($responses as $uri => $response) {
            print $uri . " - " . $response->getStatus() . $response->getReason() . PHP_EOL;
        }
    } catch (Amp\Artax\HttpException $error) {
        // If something goes wrong Amp will throw the exception where the promise was yielded.
        // The Client::request() method itself will never throw directly, but returns a promise.
        print $error->getMessage() . PHP_EOL;
    }
});

Further examples can be found in the ./examples directory of this repository as well as in the ./examples directory of our other libraries

Versioning

amphp/amp follows the semver semantic versioning specification like all other amphp packages.

Version	Bug Fixes Until	Security Fixes Until
2.x	TBA	TBA
1.x	2017-12-31	2018-12-31

Compatible Packages

Compatible packages should use the amphp topic on GitHub.

Security

If you discover any security related issues, please email bobwei9@hotmail.com or me@kelunik.com instead of using the issue tracker.

License

The MIT License (MIT). Please see LICENSE for more information.