Array chunking for SplFixedArray

array_chunk_fixed.php

<?php

// Copyright (c) 2017 Woody Gilk (@shadowhand)
// MIT License

/**
 * A chunking function for SplFixedArray
 *
 * Operates the same as array_chunk() but without $preserve_keys, for obvious reasons.
 *
 * @param SplFixedArray $arr
 * @param int $size
 *
 * @return SplFixedArray[]
 */
function array_chunk_fixed(SplFixedArray $arr, $size) {
    // Determine the number of chunks that need to be created
    $chunks = new SplFixedArray(ceil(count($arr) / $size));
    foreach ($arr as $idx => $value) {
        if ($idx % $size === 0) {
            // Create a new chunk every time we reach the maximum size
            $chunks[$idx / $size] = $chunk = new SplFixedArray($size);
        }
        // Add to the current chunk
        $chunk[$idx % $size] = $value;
    }
    // Reduce the size of the final chunk to match remainder
    $chunk->setSize(count($arr) % $size);
    return $chunks;
}