Phosphorum\Models\Posts::getDifference PHP Method

    public function getDifference()
    {
        $history = PostsHistory::findLast($this);
        if (!$history->valid()) {
            return false;
        }
        if ($history->count() > 1) {
            $history = $history->offsetGet(1);
        } else {
            $history = $history->getFirst();
        }
        /** @var PostsHistory $history */
        $b = explode("\n", $history->content);
        $diff = new Diff($b, explode("\n", $this->content), []);
        $difference = $diff->render(new SideBySide());
        return $difference;
    }