Chapter 6. Arrays!
Initializing Arrays
Using Strings for Indexes
Looping through Sequential Arrays
Looping through Non-Sequential Arrays
Multi-Dimensional Arrays
Sorting Arrays
Your First PHP Game
In Chapter 4, when you were making the form processing example, the check boxes were named nEquipmentID[]. Those two brackets mean that it is an array. An array consists of several elements, each of which has a value. You can access each element in the array by using an index. In PHP your index can be either an integer or a string, which allows a lot of flexibility in your code.
NOTE
As in C/C++, arrays in PHP are zero based, meaning that the first index in the array starts at 0.
Take a look at Figure 6.1. This representation should make it clear how an array stores its data.
Figure 6.1. How an array stores data.
In this case the array is named $board, and it has four elements. The first element of the array, $board[0], is equal to “A”. The second element of the array, $board[1], is equal to “B,” and so on. So how do you create arrays?