Track web traffic in PHP

I have tested so far is, Piwik. But only once. Piwik offers you basically two ways to track your visitors, you can add a java script code to all your pages (just like with Google Analytics) or you can use a picture tracking system. The last method will use PHP instead of JavaScript. You can combine both of them too, for those visitors who have JavaScript disabled, or those who are visiting your site with a browser not able to run Java scripts.

Why do you not want to use Google Analytics? Otherwise you will need to do ton of work tracking every requests and recording it. I don't know much about PHP but you need to look into getting the HttpRequest object or functions.