How can simplifying nested loops improve the efficiency and clarity of PHP code?

Simplifying nested loops in PHP can improve efficiency by reducing the number of iterations required and can also enhance code clarity by making it easier to understand and maintain. One way to simplify nested loops is by using array functions like `array_map` or `array_walk` to perform operations on arrays without the need for nested loops.

// Example of simplifying nested loops using array_map

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

$result = array_map(function($number) use ($multipliers) {
    return array_map(function($multiplier) use ($number) {
        return $number * $multiplier;
    }, $multipliers);
}, $numbers);

print_r($result);