broker_log.txt

1454016307: Sending CONNACK to mosq/QNQA<M\fj0`IEBIKjk (0, 0)
1454016307: Received PUBLISH from mosq/QNQA<M\fj0`IEBIKjk (d0, q2, r0, m1, 'test/mgdm', ... (5 bytes))
1454016307: Sending PUBREC to mosq/QNQA<M\fj0`IEBIKjk (Mid: 1)
1454016307: Received PUBREL from mosq/QNQA<M\fj0`IEBIKjk (Mid: 1)
1454016307: Sending PUBCOMP to mosq/QNQA<M\fj0`IEBIKjk (Mid: 1)

client_log.txt

array(2) {
  [0] =>
  int(16)
  [1] =>
  string(46) "Client mosq/av@98ACdjxDxNN5c>K sending CONNECT"
}
array(2) {
  [0] =>
  int(16)
  [1] =>
  string(47) "Client mosq/av@98ACdjxDxNN5c>K received CONNACK"
}
array(2) {
  [0] =>
  int(16)
  [1] =>
  string(91) "Client mosq/av@98ACdjxDxNN5c>K sending PUBLISH (d0, q2, r0, m1, 'test/mgdm', ... (5 bytes))"
}
array(2) {
  [0] =>
  int(16)
  [1] =>
  string(55) "Client mosq/av@98ACdjxDxNN5c>K received PUBREC (Mid: 1)"
}
array(2) {
  [0] =>
  int(16)
  [1] =>
  string(54) "Client mosq/av@98ACdjxDxNN5c>K sending PUBREL (Mid: 1)"
}
array(2) {
  [0] =>
  int(16)
  [1] =>
  string(56) "Client mosq/av@98ACdjxDxNN5c>K received PUBCOMP (Mid: 1)"
}

qos2.php

<?php

$c = new Mosquitto\Client;
$c->onLog(function(...$args) {
    var_dump($args);
});
$c->onConnect(function() use ($c) {
    $c->publish('test/mgdm', 'Hello', 2);
});

$c->connect('test.mosquitto.org');
$c->loopForever();