Correct Implementation of Publisher Confirms - PHP AMQP

Question

I have implemented publisher confirms but have a few questions regarding the right implementation. The current implementation is as follows.

$channel->set_ack_handler(
    function (AMQPMessage $message) {
        echo 'Message acked with content ' . $message->body . PHP_EOL;
    }
);

$channel->confirm_select();

$channel->basic_publish($msg, $exchange);

$channel->wait_for_pending_acks(5);

// LOGIC IF THERE IS NO ACK WITHIN 5 SECONDS
// ASSUMING THAT THE EXECUTION WILL COME HERE AFTER 5 SECONDS

If the ACK is taking more than 5S, the execution is not going after $channel->wait_for_pending_acks(5). It is throwing an exception instead.

Exception: The connection timed out after 5 sec while awaiting incoming data

Is it like the package throws an exception always after waiting for $timeout (5 seconds in our case)? Or, is the exception happening due to something else? Does it make sense if I do like below?

try {
    $channel->wait_for_pending_acks(5);
} catch (\Exception $e) {
    // LOGIC IF THERE IS NO ACK WITHIN 5 SECONDS, REPUBLISH
}

Thanks for the help!