只需在模型内部或外部创建一个方法或帮助器，从S3Bucket中删除文件，然后设置一个观察器在更新或删除过程中触发它
即
在你的模型上

class WhatEver extends Model  {

    public function deleteS3File( $path ) {
        // Delete code here 
    }
}

然后生成观察者

php artisan make:observer WhatEverObserver --model=WhatEver

则可以在updated和deleting事件上调用该方法

class WhatEverObserver  {

    // Runs when model is updated
    public function updated(WhatEver $whatEvah) {

        // Only trigger is file_path column is changed
        if ( $whatEvah->isDirty('file_path') ) {

            //Get the previous file_path record
            $oldPath = $whatEvah->getOriginal('file_path');

            //delete the previous file_path
            $whatEvah->deleteS3File( $oldPath );

        }
    }

    // Delete the file_path during model deletion
    public function deleting( WhatEver $whatEvah ) {
        $whatEvah->deleteS3File( $whatEvah->file_path );
    }
}

请务必查看观察员文档

您可以使用**$调度事件**
创建一个事件，然后在模型中，

class ClassName extends Model
{
    protected $dispatchesEvents = [
        'updated' => EventName::class
    ];
}

看看这个：https://laravel.com/docs/9.x/eloquent#events