MQTT

Asynchronous MQTT client for PHP based on workerman.

Installation

composer require workerman/mqtt

文档

中文文档

Example

subscribe.php

<?php
require __DIR__ . '/vendor/autoload.php';
use Workerman\Worker;
$worker = new Worker();
$worker->onWorkerStart = function(){
    $mqtt = new Workerman\Mqtt\Client('mqtt://test.mosquitto.org:1883');
    $mqtt->onConnect = function($mqtt) {
        $mqtt->subscribe('test');
    };
    $mqtt->onMessage = function($topic, $content){
        var_dump($topic, $content);
    };
    $mqtt->connect();
};
Worker::runAll();

Run with command php subscribe.php start

publish.php

<?php
require __DIR__ . '/vendor/autoload.php';
use Workerman\Worker;
$worker = new Worker();
$worker->onWorkerStart = function(){
    $mqtt = new Workerman\Mqtt\Client('mqtt://test.mosquitto.org:1883');
    $mqtt->onConnect = function($mqtt) {
       $mqtt->publish('test', 'hello workerman mqtt');
    };
    $mqtt->connect();
};
Worker::runAll();

Run with command php publish.php start

API

Client::__construct()
Client::connect()
Client::publish()
Client::subscribe()
Client::unsubscribe()
Client::disconnect()
Client::close()
callback onConnect
callback onMessage
callback onError
callback onClose

__construct (string $address, [array $options])

Create an instance by $address and $options.

$address can be on the following protocols: 'mqtt', 'mqtts', 'mqtt://test.mosquitto.org:1883'.
$options is the client connection options. Defaults:
- keepalive: 50 seconds, set to 0 to disable
- client_id: client id, default workerman-mqtt-client-{$mt_rand}
- protocol_name: 'MQTT' or 'MQIsdp'
- protocol_level: 'MQTT' is 4 and 'MQIsdp' is 3
- clean_session: true, set to false to receive QoS 1 and 2 messages while offline
- reconnect_period: 1 second, interval between two reconnections
- connect_timeout: 30 senconds, time to wait before a CONNACK is received
- username: the username required by your broker, if any
- password: the password required by your broker, if any
- will: a message that will sent by the broker automatically when the client disconnect badly. The format is:
  - topic: the topic to publish
  - content: the message to publish
  - qos: the QoS
  - retain: the retain flag
- resubscribe : if connection is broken and reconnects, subscribed topics are automatically subscribed again (default true)
- bindto default '', used to specify the IP address that PHP will use to access the network
- ssl default false, it can be set true or ssl context see http://php.net/manual/en/context.ssl.php
- debug default false, set true to show debug info

connect()

Connect to broker specified by the given $address and $options in __construct($address, $options).

publish(String $topic, String $content, [array $options], [callable $callback])

Publish a message to a topic

$topic is the topic to publish to, String
$message is the message to publish, String
$options is the options to publish with, including:
- qos QoS level, Number, default 0
- retain retain flag, Boolean, default false
- dup mark as duplicate flag, Boolean, default false
$callback - function (\Exception $exception), fired when the QoS handling completes, or at the next tick if QoS 0. No error occurs then $exception will be null.

subscribe(mixed $topic, [array $options], [callable $callback])

Subscribe to a topic or topics

$topic is a String topic or an Array which has as keys the topic name and as value the QoS like array('test1'=> 0, 'test2'=> 1) to subscribe.
$options is the options to subscribe with, including:
- qos qos subscription level, default 0
$callback - function (\Exception $exception, array $granted) callback fired on suback where:
- exception a subscription error or an error that occurs when client is disconnecting
- granted is an array of array('topic' => 'qos', 'topic' => 'qos') where:
  - topic is a subscribed to topic
  - qos is the granted qos level on it

unsubscribe(mixed $topic, [callable $callback])

Unsubscribe from a topic or topics

$topic is a String topic or an array of topics to unsubscribe from
$callback - function (\Exception $e), fired on unsuback. No error occurs then $exception will be null..

disconnect()

Send DISCONNECT package to broker and close the client.

close()

Close the client without DISCONNECT package.

callback onConnect(Client $mqtt)

Emitted on successful connection (CONNACK package received).

callback onMessage(String $topic, String $content, Client $mqtt)

function (topic, message, packet) {}

Emitted when the client receives a publish packet

$topic topic of the received packet
$content payload of the received packet
$mqtt Client instance.

callback onError(\Exception $exception)

Emitted when something wrong for example the client cannot connect broker.

callback onClose()

Emitted when connection closed.

License

MIT

walkor/mqtt