PHP Arrays

✅ PHP Arrays

An array in PHP is a special variable that can hold multiple values under a single name.
Each value in an array is called an element, and each element has an index (key).

🔹 Types of Arrays in PHP

PHP supports three main types of arrays:

1. Indexed Arrays (numerical index)

2. Associative Arrays (named keys)

3. Multidimensional Arrays (array inside array)

⭐ 1. Indexed Arrays

These arrays use numeric indexes starting from 0.

Creating Indexed Arrays

Method 1:

Method 2:

Accessing Array Elements

Adding Elements

Count Elements

⭐ 2. Associative Arrays

These arrays use named keys instead of numeric indexes.

Creating Associative Arrays

Or

Accessing Values

Adding/Updating Values

⭐ 3. Multidimensional Arrays

An array containing one or more arrays.

Example: 2D Array

Accessing Elements

⭐ 4. Looping Through Arrays

Indexed Array Loop

Associative Array Loop

⭐ 5. Useful Array Functions

array_push() — Add elements

array_pop() — Remove last element

array_shift() — Remove first element

array_unshift() — Add elements at beginning

in_array() — Check if value exists

array_keys() / array_values()

sort() — Sort indexed array (ASC)

asort() — Sort associative array by values

ksort() — Sort associative array by keys

⭐ 6. Associative + Multi-Dimensional Example

🎉 Summary

Arrays are one of the most important parts of PHP programming.

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