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https://github.com/ReactiveX/RxPHP

Reactive extensions for PHP
https://github.com/ReactiveX/RxPHP

asynchronous observables reactivex rxphp

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Reactive extensions for PHP

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RxPHP
======

Reactive extensions for PHP. The reactive extensions for PHP are a set of
libraries to compose asynchronous and event-based programs using observable
streams.

[![CI status](https://github.com/ReactiveX/RxPHP/workflows/CI/badge.svg)](https://github.com/ReactiveX/RxPHP/actions)
[![Coverage Status](https://coveralls.io/repos/github/ReactiveX/RxPHP/badge.svg?branch=master)](https://coveralls.io/github/ReactiveX/RxPHP?branch=master)

## Example

```php
$source = \Rx\Observable::fromArray([1, 2, 3, 4]);

$source->subscribe(
function ($x) {
echo 'Next: ', $x, PHP_EOL;
},
function (Exception $ex) {
echo 'Error: ', $ex->getMessage(), PHP_EOL;
},
function () {
echo 'Completed', PHP_EOL;
}
);

//Next: 1
//Next: 2
//Next: 3
//Next: 4
//Completed

```

## Try out the demos

```bash
$ git clone https://github.com/ReactiveX/RxPHP.git
$ cd RxPHP
$ composer install
$ php demo/interval/interval.php
```

Have fun running the demos in `/demo`.

note: When running the demos, the scheduler is automatically bootstrapped. When using RxPHP within your own project, you'll need to set the default scheduler.

## Installation
1. Install an event loop. Any event loop should work, but the ReactPHP event loop is recommended.

```bash
$ composer require react/event-loop
```

2. Install RxPHP using [composer](https://getcomposer.org).

```bash
$ composer require reactivex/rxphp
```

3. Write some code.

```PHP
take(5)
->flatMap(function ($i) {
return Observable::of($i + 1);
})
->subscribe(function ($e) {
echo $e, PHP_EOL;
});

$loop->run();

```
## Working with Promises

Some async PHP frameworks have yet to fully embrace the awesome power of observables. To help ease the transition, RxPHP has built in support for [ReactPHP promises](https://github.com/reactphp/promise).

Mixing a promise into an observable stream:

```PHP
Observable::interval(1000)
->flatMap(function ($i) {
return Observable::fromPromise(\React\Promise\resolve(42 + $i));
})
->subscribe(function ($v) {
echo $v . PHP_EOL;
});
```

Converting an Observable into a promise. (This is useful for libraries that use generators and coroutines):
```PHP
$observable = Observable::interval(1000)
->take(10)
->toArray()
->map('json_encode');

$promise = $observable->toPromise();
```

## Additional Information
- [The Official Reactive Extensions Documentation](http://reactivex.io/documentation/observable.html)
- [A Simple Introduction to Observables](https://www.youtube.com/watch?v=uQ1zhJHclvs)(video)

## License

RxPHP is licensed under the MIT License - see the LICENSE file for details