What are the best practices for efficiently handling arrays in PHP?

When working with arrays in PHP, it is important to use built-in array functions efficiently to manipulate and iterate through arrays. Avoid using nested loops when possible, as they can slow down performance. Instead, utilize functions like array_map, array_filter, and array_reduce to streamline array operations.

// Example of efficiently handling arrays in PHP
// Using array_map to manipulate array elements

$numbers = [1, 2, 3, 4, 5];

// Square each number in the array
$squaredNumbers = array_map(function($num) {
    return $num * $num;
}, $numbers);

print_r($squaredNumbers);