Php mosquitto mqtt client identify client onDisconnect

Question

I am working on PHP project using mosquitto client, I need to check when some user disconnects, and identify the user.

I am using code callback function which only contains the reason for disconnect.

onDisconnect($callback)

function so that I can handle the disconnect event.

How to link the event to the user in the database.

Thanks,

score 1 · Accepted Answer · answered Feb 20 '17 at 11:09

1

That callback is saying that your client was disconnected, not some other client (which is what you mean by "user" probably). You can know that another client disconnected only if

that client has set Last Will topic and disconnected abruptly - this will be published by the broker for you
that client will publish a specific graceful disconnection topic - you must provide the publishing

In both cases, your client must be subscribed to the topic in question, of course.

answered Feb 20 '17 at 11:09

Pavel Zdenek

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but, I still don't know which client disconnected !! – Mostafa Khattab Feb 20 '17 at 11:18
@MostafaKhattab **your client**. You. The PHP script which called `connect()` – Pavel Zdenek Feb 20 '17 at 11:19
I mean other clients, who connect on the same server and publish on topics shared with php client script. Sorry for misunderstanding. – Mostafa Khattab Feb 20 '17 at 11:29
1

MQTT broker (what you call "server") does not inform about every client about disconnection of every other client. You must do one of the things in the answer. – Pavel Zdenek Feb 20 '17 at 11:35

Php mosquitto mqtt client identify client onDisconnect

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