Mongolid\Cursor\EmbeddedCursor::sort PHP Method

    public function sort(array $fields)
    {
        foreach (array_reverse($fields) as $key => $value) {
            // Uses usort with a function that will access the $key and sort in
            // the $value direction. It mimics how the mongodb does sorting
            // internally.
            usort($this->items, function ($a, $b) use($key, $value) {
                $a = is_object($a) ? $a->{$key} ?? null : $a[$key] ?? null;
                $b = is_object($b) ? $b->{$key} ?? null : $b[$key] ?? null;
                if ($a < $b) {
                    return $value * -1;
                }
                return $value;
            });
        }
        return $this;
    }