Website Traffic and Pages Access data

PHP /Ajax script to register and display simple statistics of website traffic, and Pages Access data. These data are registered via Ajax, after the page is displayed in browser at least 5 seconds. The website access data are not registered again if the page is refreshed. This script not records the accesses of bots engines, and it can be included in both .php and .html files (but the server must run PHP). Traffic data can be saved in text files on the server, or into a MySQL database (using PDO).