title: Reading and updating data from outside the widget
body: <p>Is it possible to first request the data of some widget, and then update the data or add new ones?
  Example: Product card widget. There are several of them on the page. I go to the admin panel and by pressing the button the data in all widgets is updated based on those received from other sources (API of a third-party site). In short, the synchronization of data in some widgets based on some data received from another site.
  Whatever the manager manually checks, does not waste time changing prices, the availability of balances based on data from a friendly site, from where I get the data.
  How can one read widget data on some page via PHP?</p>