(PECL gearman >= 0.5.0)
GearmanClient::setStatusCallback — Set a callback for collecting task status
Sets a callback function used for getting updated status information from a worker.
Note: The callback will only be triggered for tasks that are added (e.g. by calling GearmanClient::addTask()) after calling this method.
callbackGEARMAN_SUCCESS.
taskcontextcontext.