Compare 2 arrays values $old and $new and return array [ new values, unchanged values, deleted values]

MiscHelper.php

<?php

/**
 * Class MiscHelper
 * @package app\helpers
 */
class MiscHelper
{
    /**
     * ```php
     * list($create, $update, $delete) = MiscHelper::diff([25, 33 ], [ 25, 55, 57 ]);
     * var_dump($create) // [55, 57]
     * var_dump($update) // [25]
     * var_dump($delete) // [33]
     * ```
     *
     * Compare 2 arrays values $old and $new and return array [ new values, unchanged values, deleted values]
     * @param array $old
     * @param array $new
     * @return array
     */
    public static function diff(array $old, array $new): array
    {
        $new = array_flip($new);
        $old = array_flip($old);
        $update = array_intersect_key($old, $new);
        $delete = array_diff_key($old, $update);
        $create = array_diff_key($new, $update);
        return [array_keys($create), array_keys($update), array_keys($delete)];
    }
}