PHP script to Find out IP address

We can get the Internet Protocol (IP) address of any visitor by using PHP. Finding the IP address is very important requirement for many scripts where we store the members or visitors details. For security reason we can store IP address of our visitors who are doing any purchases or doing any type of transaction online. We can using the IP address to find out geographical location of the visitor. Some time based on the IP address we can redirect the browser to different areas of the site.