Showing the Browser and IP Address php

Here is a demo page that prints out the browser string and the IP address of the HTTP request. Create a file with the following content in your web directory, name it something like demo.php, and load it in your browser.
The $_SERVER['PHP_AUTH_USER'] and $_SERVER['PHP_AUTH_PW'] global variables contain the username and password supplied by the user, if any. if (! pc_validate($_SERVER['PHP_AUTH_USER'], $_SERVER['PHP_AUTH_PW'])) { header('WWW-Authenticate: Basic realm="My Website"'); header('HTTP/1.0 401 Unauthorized'); echo "Need to enter a valid userid and password."; exit; }