Summary of PHP Indexed Arrays

Introduction to Indexed Arrays

Indexed Arrays are arrays that utilize numeric indexes to access their elements. They serve the purpose of storing a collection of related data within a single variable, making data management more efficient.

Key Concepts

• Creation: Indexed arrays can be created using the array() function or the shorthand [] notation.
• Indexing: In PHP, arrays are zero-indexed, meaning the first element can be accessed using index 0.

Creating Indexed Arrays

Indexed arrays can be created in two primary ways:

• Using array() Function:
• Using Short Syntax:

$fruits = ["Apple", "Banana", "Cherry"];

$fruits = array("Apple", "Banana", "Cherry");

Accessing Array Elements

Array elements can be accessed using their respective indexes:

echo $fruits[0]; // Outputs: Apple

Modifying Array Elements

To change the value of an element, you can use its index:

$fruits[1] = "Blueberry"; // Changes Banana to Blueberry

Adding Elements to an Array

New elements can be added to an indexed array in several ways:

• Using Index:
• Using array_push(): This function appends elements to the end of the array.

array_push($fruits, "Elderberry"); // Adds Elderberry

$fruits[3] = "Dragonfruit"; // Adds Dragonfruit at index 3

Looping Through Indexed Arrays

You can iterate through the elements of an indexed array using a for loop or foreach loop:

foreach ($fruits as $fruit) {
    echo $fruit . " ";
}

Summary

Indexed arrays in PHP are simple yet powerful structures for managing lists of items. They can be created, accessed, modified, and iterated easily, making them essential for effective data management in PHP programming.