($subscribe == 1 ? 'subscribe' : 'unsubscribe') .
'&hub.topic=' . urlencode($hub_topic) .
'&hub.challenge=' . $hub_challenge .
'&hub.lease_seconds=604800' .
'&hub.verify_token=' . $hub_verify_token;
($subscribe == 1 ? 'subscribe' : 'unsubscribe') .
'&hub.topic=' . urlencode($hub_topic) .
'&hub.challenge=' . $hub_challenge .
'&hub.lease_seconds=604800' .
'&hub.verify_token=' . $hub_verify_token;