Chapter 7. Working with Arrays
In this lesson you will learn how to use arrays in PHP to store and retrieve indexed data.
What Is an Array?
An array is a variable type that can store and index a set of values. An array is useful when the data you want to store has something in common or is logically grouped into a set.
Creating and Accessing Arrays
Suppose you wanted to store the average temperature for each month of the year. Using single-value variables—also known as scalar variables—you would need 12 different variables—$temp_jan, $temp_feb, and so on—to store the values. By using an array, you can use a single variable name to group the values together and let an index key indicate which month each value refers to.
The following PHP statement declares ...
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