Redis publishing when no subscriber

In Redis pub/sub if something is published when there is no subscriber, data is kind of lost.

What i wanted is kind of notification to publisher when subscriber is subscribed.

One way could be keep publishing in a loop and break the loop when publisher find at least one subscriber. But i don't think thats a good way. (Also i can't keep exponential back off).

while(1) {
    $numOfSubscriber = $redis->publish($channel1, $encodePublish);
    if($numOfSubscriber > 0)
        break;
}

Is there any better way to solve the same issue?

I am using Predis.