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Example code of streamcommon/promise

Informations about the package promise

PHP Promises/A+ implementation

PHP >= 7.2 Swoole >= 4.2 Latest Stable Version Total Downloads

This package provides Promise/A+ PHP implementation.

Branches

Master Build Status Coverage Status

Develop Build Status Coverage Status

Installation

Console run:

Or add into your composer.json:

If you want see TRUE promise then install Swoole extension. For more info visit the Swoole repo

NOTE: TRUE promise work only in CLI mode

Promise

Promise is a library which provides Promise/A+ PHP implementation.

All Promise it a special PHP classes that contains its state:

To initiate a new promise, you can use static method PromiseInterface::create or create with new. All resulting Promise has PromiseInterface::STATE_PENDING state.

When function($resolve, $reject) executor finishes the job, it should call one of the functions:

Method PromiseInterface::then() it be called after promise change stage. In terms of our analogy: this is the “subscription".

Calling PromiseInterface::resolve() creates a successfully executed promise with the result value.

It is similar to:

Similarly PromiseInterface::reject() creates an already executed promise with an error value.

It is similar to:

Sub promise

When function($resolve, $reject) executor finishes the job, it can return PromiseInterface.

In this case, it will wait for the execution of sub promise.

Method PromiseInterface::then() can return PromiseInterface to.

For more info check example scripts.

Example

Standard Promise

If you want see TRUE promise then install Swoole extension. For more info visit the Swoole repo

NOTE: TRUE promise work only in CLI mode

Sub promise

Sub async promise

If use ExtSwoolePromise with daemon|cycle|loop you must use Swoole\Runtime::wait()

All versions of promise with dependencies

PHP Build Version
Package Version
Requires php Version ^7.3
doctrine/collections Version ^1.6.4
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