How can I sort the array according to my algorithm?

Question

PHP

The input data is, for example :
1. Distribution quantity = 3
2. Array
[0] => Selling cutlet
[1] => Selling shoes
[2] => Selling seeds
[3] = > Selling cutlet [
4 ] => Selling shoes
[5] => Seeds for sale
[6] => Cutlets for sale [
7] => Shoes for sale
[8] => Seeds
for sale [8] => Seeds for sale [1] => Shoes for sale [5] => Seeds for sale [6] => Cutlet for sale [2] => Seeds for sale [3] => Cutlet for sale
[7] => Selling shoes
That is, at the output I need to get a resorted array, the elements of which will always be different, the key value in the example, equal to 3 , takes part in the sorting algorithm, because the number can change.
Maybe I'm delusional.

Answer 1

Which algorithm is not clear, but keywords: "resort array according to my algorithm" is one of 2 functions:
php.net/uasort
php.net/uksort
----------------- --------------------
If the task is set in a new way, it is easier to do this:
1. highlight the keywords (sell, sell, sale "
2. highlight the second words
3. stick together.

$keys  = ["Продам", "Продаётся", "Продажа"];
$words = ["котлету", "ботинок", "семки"];

$groupSize  = 3;
$amount = sizeof($keys)*sizeof($words);
$list = array_fill(0,$amount, "");
foreach ($keys as $group => $groupName) {
    foreach ($words as $item => $word) {

        $index = (($group+$item) * $groupSize + $group)%$amount;

        $list[$index] = $groupName . ' ' . $word;


    }

}

print_r($list);

Or, if you want in parts, then for example like this:

/** Создаём список. важно что он имеет строгий формат */
$keys  = ["Продам", "Продаётся", "Продажа"];
$words = ["котлету", "ботинок", "семки"];

$list = [];
foreach ($words as $wordId => $word) {
    foreach ($keys as $groupId => $groupName) {
        $list[] = $groupName . ' ' . $word;
    }
}
// сортируем
$groupSize  = 3;
$output = array_fill(0, sizeof($list), "");

foreach ($list as $id => $string) {
    $group = floor($id/$groupSize);
    $item = $id%$groupSize;
    $index = (($group+$item) * $groupSize + $item)%sizeof($list);
    $output[$index] = $string;

}

print_r($output);

Answer 2

in the function, create a temporary array and add the necessary elements to it with the necessary indices, then the temporary array to exit through return