This is simple. I am moving on.

I have no idea why I need to learn about GLOBALS ... I guess I will be using it later.

With is I know what kind of server environment my program is running.

It is sometime important to understand what kind of data you are dealing with. This is specially useful when you are trying to verify user input.

I guess to create dimension (or multi dimensional array) using PHP, you do not need to define the dimension size. It is very interesting.

Array Sort. When I was programming in the other language, I had to write a routine to do the sorting. But PHP provides a function to do the sorting.

(1) Creating Array. (2) Imploding Array into a string. (3) Exploding a string back to an array. This function should be useful creating a CSV file or reading CSV file in an array. Note: So far the most difficult thing about learning PHP is to create an environment where you can test your source code. Lucky for me, I have...