Array of partitions with always the same number of sub-array indexes.

<?php

function partitionFixedSubArray($array, $length, $empty_space)
{   
    $result = [];

    if ( sizeof($array) ) {

        $result = array_chunk($array, $length);
        $last_array_count = sizeof(end($result));

        if ($last_array_count < $length) {

            for ($i = $last_array_count; $i < $length; $i++) {
                array_push($result[key($result)], $empty_space);
            }
        }
    }

    return $result;
}

$employees = [
    "Paidi",
    "Paijo",
    "Darno",
    "Kusnan",
    "Mukidi",
    "Sarno",
    "Nurdin",
    "Parmen",
    "Sukinah",
    "Sartini",
    "Sukijan",
    "Yono",
    "Supoyo"
];

echo "<pre>";
print_r(partitionFixedSubArray($employees, 5, "empty space"));
echo "</pre>";

?>

Output:
Array
(
    [0] => Array
        (
            [0] => Paidi
            [1] => Paijo
            [2] => Darno
            [3] => Kusnan
            [4] => Mukidi
        )

    [1] => Array
        (
            [0] => Sarno
            [1] => Nurdin
            [2] => Parmen
            [3] => Sukinah
            [4] => Sartini
        )

    [2] => Array
        (
            [0] => Sukijan
            [1] => Yono
            [2] => Supoyo
            [3] => empty space
            [4] => empty space
        )

)