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PHP Arrays

PHP Arrays

What you'll learn

  • Understand the main ideas in PHP Arrays.
  • See a working example and explanation to help you learn by doing.
  • Follow a clear path to the next lesson in this topic.

When to use this lesson

Use this lesson when you want to understand the key concepts behind PHP Arrays.

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PHP Arrays

An array stores multiple values in one single variable. Arrays are essential when working with lists of data, such as a list of users, products, or settings.

Indexed Arrays

Indexed arrays use numeric indexes (starting at 0) to store and access values.

Example

<?php
$cars = array("Volvo", "BMW", "Toyota");
echo "I like " . $cars[0] . ", " . $cars[1] . " and " . $cars[2] . ".";
?>

Associative Arrays

Associative arrays are arrays that use named keys that you assign to them. These are very similar to dictionaries or hash maps in other languages.

Associative Example

<?php
$age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
echo "Peter is " . $age['Peter'] . " years old.";
?>

Multidimensional Arrays

A multidimensional array is an array containing one or more arrays. PHP supports deep multidimensional arrays, which are frequently used to store complex datasets from databases.

(Note: You can get the length of an array using the count() function).

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