IncomingMessageTopicAlias Property

An integer used to identify the topic instead of the full topic filter in order to reduce the size of the publish packet.

Object Oriented Interface

public function getIncomingMessageTopicAlias($incomingmessageindex);

Procedural Interface

ipworksmq_mqtt_get($res, 24 , $incomingmessageindex);

Default Value

0

Remarks

An integer used to identify the topic instead of the full topic filter in order to reduce the size of the publish packet.

If a non-zero topic alias is received, the client should establish a new topic alias mapping or use an existing mapping, depending on whether the IncomingMessageTopic string is empty.

For details on setting topic aliases for outgoing messages, see the TopicAlias configuration setting.

Valid only for MQTT 5.

The $incomingmessageindex parameter specifies the index of the item in the array. The size of the array is controlled by the IncomingMessageCount property.

This property is read-only and not available at design time.

Data Type

Integer

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IPWorks MQ 2020 PHP Edition - Version 20.0 [Build 8162]