Interception of Requests by HTML Purifier
<p>How does something like HTML Purifier or CSRF Magic actually intercept an HTTP request? Its documentation says its based of the idea of the Django Middleware framework of Python but I am yet to find some documentation of how it intercepts HTTP Requests. It works without actually having the need to install any PHP extensions. </p>

<p>Can anyone shed some light on the issue?</p>

<p>Regards </p>
