MQTT

Asynchronous MQTT client for PHP based on swoole.

Installation

composer require try-to/swoole_mqtt

文档

中文文档

Example

subscribe.php

<?php
use TrytoMqtt\Client;
require_once __DIR__ . '/vendor/autoload.php';
$options = [
    'clean_session' => false,
    'client_id' => 'demo-subscribe-123456',
    'username' => '',
    'password' => '',
];
$mqtt = new Client('127.0.0.1', 1883, $options);
$mqtt->onConnect = function ($mqtt) {
    $mqtt->subscribe('/World');
};
$mqtt->onMessage = function ($topic, $content) {
    var_dump($topic, $content);
};
$mqtt->onError = function ($exception) use ($mqtt) {
    echo "error\n";
    // $mqtt->reconnect(1000);
};
$mqtt->onClose = function () {
    echo "close\n";
};
$mqtt->connect();

Run with command php subscribe.php

publish.php

<?php
use TrytoMqtt\Client;
require_once __DIR__ . '/../vendor/autoload.php';
$options = [
    'clean_session' => false,
    'client_id' => 'demo-publish-123456',
    'username' => '',
    'password' => '',
];
$mqtt = new Client('127.0.0.1', 1883, $options);
$mqtt->onConnect = function ($mqtt) {
    $mqtt->publish('/World', 'hello swoole mqtt');
};
$mqtt->onError = function ($exception) {
    echo "error\n";
};
$mqtt->onClose = function () {
    echo "close\n";
};
$mqtt->connect();

Run with command php publish.php

API

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

---

__construct (string $host, int $port, [array $options])

• $host Service address.

• $port port.

• $options is the client connection options. Defaults:

  • keepalive: 50 seconds, set to 0 to disable
  • client_id: client id, default swoole-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 service __construct($host, $port, $options).

---

reconnect()

Reconnect service __construct($host, $port, $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.

---

material

https://github.com/walkor/mqtt