刚接触GatewayWorker,请教大神,访客离线如何向客服端发送离线信息,好让客服端做对应数据清楚操作?fromid'=>$fromid,
'ref'=>$ref,
'ip'=>$ip,
'city'=>$city,
'time'=> time()
];
//向客服发送新访客信息>$kefuid,
'chat'=>$text,
'time'=> time()
];
//检测否在线后发送消息userid-out",
'kefuid'=>$kefuid,
];
Gateway::sendToUid($kefuid,json_encode($data));
//请问访客离线如何把userid发送给kefuid,让客服端根据userid删除对应userid的访客轨迹数据?