Laravel 出现Opis\Closure\SerializableClosure__serialize() and __unserialize()

laravel8.5使用php8.1最新版本出现如下错误

In SerializableClosure.php line 18:
                                                                                                                          
  Opis\Closure\SerializableClosure implements the Serializable interface, which is deprecated. Implement __serialize() a  
  nd __unserialize() instead (or in addition, if support for old PHP versions is necessary)                               
                                                                                           

解决办法：

PHP 8.1 还没有准备好用于生产，Laravel 在 PHP 8.1 上也没有。所以需要先降级到php8