PHPMQTT v1.3.0 版本发布，MQTT 协议解析 & 协程客户端

use Simps\MQTT\Protocol\Types;
use Simps\MQTT\Protocol\V3;
use Simps\MQTT\Message\ConnAck;
use Simps\MQTT\Message\PingResp;
$server = new Swoole\Server('127.0.0.1', 1883, SWOOLE_BASE);
$server->set(
    [
        'open_mqtt_protocol' => true,
        'package_max_length' => 2 * 1024 * 1024,
    ]
);
$server->on('connect', function ($server, $fd) {
    echo "Client #{$fd}: Connect.\n";
});
$server->on('receive', function (Swoole\Server $server, $fd, $from_id, $data) {
    $data = V3::unpack($data);
    if (is_array($data) && isset($data['type'])) {
        switch ($data['type']) {
            case Types::CONNECT:
                if ($data['protocol_name'] != 'MQTT') {
                    $server->close($fd);
                    return false;
                }
                $server->send(
                    $fd,
                    (new ConnAck())->setCode(0)
                        ->setSessionPresent(0)
                );
                break;
            case Types::PINGREQ:
                $server->send($fd, (new PingResp()));
                break;
        }
    } else {
        $server->close($fd);
    }
});
$server->on('close', function ($server, $fd) {
    echo "Client #{$fd}: Close.\n";
});
$server->start();

use Simps\MQTT\Message\ConnAck;
$ack = new ConnAck();
$ack->setCode(0)->setSessionPresent(0);
$server->send($fd, $ack->getContents());
$server->send($fd, $ack);
• MQTT5
use Simps\MQTT\Message\ConnAck;
use Simps\MQTT\Protocol\ProtocolInterface;
$ack = new ConnAck();
$ack->setProtocolLevel(ProtocolInterface::MQTT_PROTOCOL_LEVEL_5_0)
    ->setCode(0)
    ->setSessionPresent(0)
    ->setProperties([]);
$server->send($fd, $ack->getContents());
$server->send($fd, $ack);