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<?php
declare(strict_types=1);
namespace unreal4u\MQTT\Protocol;
use unreal4u\MQTT\Internals\ProtocolBase;
use unreal4u\MQTT\Internals\WritableContent;
use unreal4u\MQTT\Internals\WritableContentInterface;
/**
* The PINGREQ Packet is sent from a Client to the Server. It can be used to:
*
* - Indicate to the Server that the Client is alive in the absence of any other Control Packets being sent from the
* Client to the Server.
* - Request that the Server responds to confirm that it is alive.
* - Exercise the network to indicate that the Network Connection is active.
*/
final class PingReq extends ProtocolBase implements WritableContentInterface
{
use WritableContent;
const CONTROL_PACKET_VALUE = 12;
public function createVariableHeader(): string
return '';
}
public function createPayload(): string
public function shouldExpectAnswer(): bool
return true;
unreal4u /
mqtt
