Restrict access to pages in php
<p>I have a LAMP server, my main application page demands new ajax requests every 3 seconds. To prevent the server from being overloaded, I want to block normal viewers (those who arene't paid clients) to open only a single instance of the application page, whereas the paid clients can open multiple instances of the page</p>

<p>Any I Ideas?</p>

<p>Thanks</p>
