Network Security People, help me out...?

Still learning about Network security and web page development. Currently Learning PHP and MySQL. Other than that, I am pretty much an HTML, JScript amatuer web designer. On my web site, I would like to be able to record and log the IP address of people who visit my site. Is this accomplished through code on a page, or by adding software to the server? And While I have you here reading, what programming is best for log in abilities (creating user names and passwords)? As I said, still learning, so any help is appreciated. Any references to tutorial sites, or books is also appreciated. I would like to learn as much as possible about web development, network security, and intrusion detection and prevention.
Thank you! ( And yes, I give best answer)

Most web servers will automatically log ip, browser and page visited. Look for a logging option in your server setup. As to your second question, that is almost completely dependent on your server/webserver platform. It may be of value to you to become somewhat proficient in server/webserver basic operations. There are many resources for linux/apache and iis/windows, just get a getting started manual or book.