PHP array random elements per segments

array_rand_segmented.php

<?php

/**
 * Get random elements by segments
 * 
 * If you pass 100 elements with limit 5, it will return 5 elements in following order:
 *
 * First: rand between 0 - 20
 * Second: rand between 20 - 40
 * Third: rand between 40 - 60
 * Fourth: rand between 60 - 80
 * Fifth: rand between 80 - 100
 *
 * @param array $elements
 * @param int $limit
 * @return array
 */
public static function arrayRandSegmented(array $elements, int $limit): array
{
    $randomElements = [];

    $itemsCount = count($elements);
    if ($itemsCount && $limit < $itemsCount) {
        $elements = array_values($elements);
        $step = intval($itemsCount / $limit);
        for ($i = 0; $i < $limit; $i++) {
            $currentOffset = $i * $step;
            $randomIndex = rand($currentOffset, $currentOffset + $limit - 1);

            $randomElements[$randomIndex] = $elements[$randomIndex];
        }
    }

    return $randomElements;
}