Learn PHP basics with hands-on practice in hello world in PHP, variables in PHP, functions in PHP, arrays in PHP, PHP inheritance, PHP exceptions, and more.

This interactive course introduces you to the fundamentals of PHP programming, one of the most widely used languages in web development. Starting with a simple hello world in PHP, you’ll explore the basics, including PHP output, variables in PHP, and PHP data types. You’ll also learn about PHP constants, arithmetic operators, comparison operators, logical operators, and assignment operators.

The course progresses into conditional statements in PHP, PHP switch, and various loops such as PHP for loop, PHP while loop, and more. You will then dive deeper into functions in PHP, understand PHP variable scope, and learn PHP pass by reference or value. Additionally, you’ll gain a working knowledge of strings in PHP, PHP string operations, and handling arrays in PHP, including PHP multidimensional arrays.

In the advanced sections, you’ll explore classes in PHP, inheritance, constructors, and destructors, handling PHP exceptions with PHP throw and catch exceptions.

Learn PHP

# What are Multidimensional Arrays?
PHP allows us to create multidimensional arrays. These arrays contain items that can be a single value or an array itself. These arrays can be thought of as an extension to the linear arrays. There is no limit to the dimensions of a multidimensional array.
It can also be visualized as **an array of arrays**


Notice that in the figure above, the first index of the outer array is an array of two, whereas, the other two indices have arrays of three elements each. This means that PHP allows us to create multi-dimensional arrays where the elements (in this case array) at each index may vary in size.
# Declaring Multidimensional Arrays
The declaration of *2-D arrays* is as follows:
```php
 $arrayName = array(array(), array()......array())
```
Arrays, in PHP, are resized dynamically, and attempt to write anything to non-existent element creates it and creates an entire array if needed.
Before moving on to more complex multidimensional arrays, let us start with a simple example:

In this lesson, we will learn how to work with multidimensional arrays.

PHP Basics

PHP Variables

PHP Operators

PHP Conditional Statements

PHP Loops

PHP Functions

PHP Strings

PHP Arrays

PHP Assessment 1

PHP Classes

Exception Handling in PHP

PHP Assessment 2

Multidimensional Array

What are Multidimensional Arrays? #