PHP iteratorChunk: alternative to array_chunk for iterators

index.php

<?php

$fruits = [
    'apple',
    'banana',
    'cherry',
    'damson',
    'elderberry'
];
foreach (\App\IteratorHelper::iteratorChunk(new \ArrayIterator($fruits), 2) as $fruitsChunk) {
  // Handle batch of items. Chunk is an iterator.
  var_dump(iterator_to_array($fruitsChunk));
}

/*
array(2) {
  [0]=>
  string(5) "apple"
  [1]=>
  string(6) "banana"
}
array(2) {
  [2]=>
  string(6) "cherry"
  [3]=>
  string(6) "damson"
}
array(1) {
  [4]=>
  string(10) "elderberry"
}
*/

IteratorHelper.php

<?php
namespace App;

class IteratorHelper
{  
  public static function iteratorChunk(\Iterator $i, int $size = 100): \Generator
  {
    for ($i = static::remaining($i); $i->valid(); $i = static::remaining($i)) {
      yield new \LimitIterator($i, 0, $size);
    }
  }

  /**
   * Converts iterator (whether started or not) to new (not started) generator.
   * It is required because "foreach" uses "rewind" internally - which breaks any started generator.
   *
   * @link https://stackoverflow.com/a/40352724
   */
  public static function remaining(\Iterator $i): \Generator
  {
    // Check is required as "yield from" will break for closed iterators.
    if ($i->valid()) {
      yield from $i;
    }
  }
}