permutations with repetition

<?php

$arr = [
  'one',
  'two',
  'three',
];

function permutate_with_repeat($arr, $length)
{
  $permutations = [];

  function recurse($array, $data) use (&$permutations, $length)
  {
    $size = count($array);

    if ($size == 0) {
      $permutations[] = $data;
    } else {
      for ($i = 0; $i < $size; $i++) {
        $recur_data = $data;
        $recur_data[] = $array[$i];
        $recur_array = array_slice($array, 0);
        array_splice($recur_array, $i, 1);
        recurse($recur_array, $recur_data);
      }
    }
  }

  recurse($arr, []);

  $permutations = array_filter($permutations, function ($item) use ($length) {
    return count($item) === $