Getting information about your visitors is interesting and sometimes useful for generating statistics, especially when you have a high traffic.
Parsing Character Delimited Files into Arrays
In this tutorial you will learn how to parse a multiple-line character delimited text file into a two dimensional array using PHP.
Check if VIN number is valid
Complex PHP code for checking the validity of VINs (vehicle identification numbers). It also returns the check digit of each VIN number.
How to convert date to time and back
This tutorial show how to convert DATE to TIME and customize output