This PHP library implements a subscriber for PubSubHubbub.
It was written by Josh Fraser and is released under the Apache 2.0 License
Update your composer
require block:
"require": { "pubsubhubbub/subscriber": "*" }
use \Pubsubhubbub\Subscriber\Subscriber;
$hub_url = "http://pubsubhubbub.appspot.com";
$callback_url = "put your own endpoint here";
// create a new subscriber
$s = new Subscriber($hub_url, $callback_url);
$feed = "http://feeds.feedburner.com/onlineaspect";
// subscribe to a feed
$s->subscribe($feed);
// unsubscribe from a feed
$s->unsubscribe($feed);