how to give desktop notification for my php web app?
<p>I was create one small application in PHP, for admin and client communication purpose. 
Now I need to show desktop notification while the admin send any message to client.if any updates happen in the database, it should show desktop notification. </p>

<p>1) I want immediate desktop notification like facebook. how could the UI comes to know the modification is done on database.?</p>

<p>2) When the insert or update happens in the database for particular users, and 
the particular user only have to receive the notification. How to do this.?    </p>

<p>Any one please give some suggestion to make desktop notification as per I want</p>

<p>Thank you</p>