cyclicRotation.php

<?php

/*
Rotate an array to the right by a given number of steps.
*/
function cyclicRotation(array $arr, int $k): array
{
    if (empty($arr)) {
        return $arr;
    }

    for($i = 0; $i < $k; $i++) {
        $arr = array_merge([array_pop($arr)], $arr);
    }
    
    return $arr;
}


$test = [
    [
        [3, 8, 9, 7, 6],
        3,
    ], // Result [9, 7, 6, 3, 8]
    [
        [0, 0, 0],
        1,
    ], // Result: [0, 0, 0]
    [
        [1, 2, 3, 4],
        4,
    ], // Result: [1, 2, 3, 4]
];

foreach($test as $params) {
    print_r(cyclicRotation(...$params));
}