PHP Arrays

In PHP, an array is a data structure that stores multiple values in a single variable. Each value in an array is called an element, and each element is associated with a unique index. Here’s an overview of PHP arrays:

Indexed Arrays:

An indexed array is an array where each element is assigned a numerical index, starting from zero.
Declaration and Initialization:

• $colors = array("Red", "Green", "Blue"); // Using array() function
$fruits = ["Apple", "Banana", "Orange"]; // Using square brackets (PHP 5.4+)

Accessing Array Elements:

• echo $colors[0]; // Output: Red
echo $fruits[2]; // Output: Orange

Associative Arrays:

An associative array is an array where each element is associated with a specific key instead of numerical indexes.
Declaration and Initialization:

• $person = array("name" => "John", "age" => 30, "city" => "New York");

Accessing Array Elements:

• echo $person["name"]; // Output: John
echo $person["age"]; // Output: 30

Multidimensional Arrays:

A multidimensional array is an array containing one or more arrays as its elements. These arrays can be indexed arrays, associative arrays, or a combination of both.

Declaration and Initialization:

• $students = array(
 array("name" => "John", "age" => 20),
 array("name" => "Alice", "age" => 22),
 array("name" => "Bob", "age" => 21)
);

Accessing Array Elements:

• echo $students[0]["name"]; // Output: John
echo $students[1]["age"]; // Output: 22