When dealing with arrays in PHP, what are some considerations for minimizing system load and optimizing runtime performance?

When dealing with arrays in PHP, one consideration for minimizing system load and optimizing runtime performance is to avoid unnecessary iterations over large arrays. Instead, try to use built-in array functions like array_map, array_filter, or array_reduce to perform operations efficiently. Additionally, consider using associative arrays when key-value pairs are needed to avoid searching through the entire array.

// Example of using array_map to efficiently manipulate array elements
$numbers = [1, 2, 3, 4, 5];
$multipliedNumbers = array_map(function($num) {
    return $num * 2;
}, $numbers);