Is it possible to automatically parse information not via cron?

Question

PHP

There is one site, I need it so that as soon as some article appears on it, the script immediately automatically parses the text and throws it into the VKontakte group.
Is it possible to solve this problem not through cron? So that you don’t have to actually access the site, but the script worked

Answer 1

If you unfasten a large amount of money to the administrator of that site every month, he will most likely even set up push notifications for you.

Answer 2

Google Alerts can be configured to notify you of new content on the site.

Answer 3

Well, if you can modify the site, then you need to add the code, so that when you publish an article, it is also published on VKontakte.
If you can not change the code of the site - then nothing. It remains only to periodically access the site and if something appears there, then parse it.