A PHP-GTK widget which needs to continuously synchronize data

I need to develop a desktop widget which needs to be run in the silent mode. This widget (application) needs to continuously synchronize data from the parent website. We were trying to develop this using PHP-GTK but are unable to come up with an appropriate solution.

The desktop widget needs to show the user real time updates made on the website similar to real player widget. So I need support to understand how to make this widget in silent mode and to show the real time updates.

By silent mode, I meant an application such as gaim which will remain on the taskbar and run in the background. As soon an update is made on the website the same needs to flash on user's widget.

Any suggestion or pointers will help us. Thanks in advance for your time.