Laravel日期差异与碳[重复]

Question

我正试图在过期日期前三天发送电子邮件，，但我不知道如何发送？

思维方式

1. 检索剩余三天到期的所有订阅者
2. 发送电子邮件给他们的用户

代码

表我需要检查名为订阅的时间戳。

$subscribes = Subscribe::all();

这个表有一个名为expires_at的列，我需要检查它以找到还剩3天。

还有我的邮件

Mail::to($user->email)->send(new SubscribeExpire($user, $subscribe));

我对碳计算感到困惑，有人能帮我吗？

根据下面的答案，我现在有了这个：

$subscribes = Subscribe::where('expires_at', Carbon::now()->subDays(3))->get();
        $user = [];
        $package = [];
        foreach($subscribes as $subscribe){
            $user = User::where('email', $subscribe->email);
            $package = Package::where('id', $subscribe->package_id);
        }

        Mail::to($user->email)->send(new SubscribeExpire($user, $package));

但是当我运行命令时，它会得到这个错误

ErrorException  : Trying to get property 'email' of non-object




Answer 1

使用subDay（）方法，如下所示：

$subscribes = Subscribe::where('expires_at', Carbon::now()->subDays(3))->get();

Answer 2

  // here you get subscribes  
  // if you are going to send three days before the expiry date, this means we need to check if expires_at is in three days so probably need to add days. Or maybe even check if time left before expiration is more than three days and less than one day and run it once per day?
  $subscribes = Subscribe::whereDate('expires_at', Carbon::now()->addDays(3))->get();
    $user = [];
    $package = [];
    foreach($subscribes as $subscribe){
        // you probably have only one user with this email
        $user = User::where('email', $subscribe->email)->first();
        // you probably have one associated package
        $package = Package::where('id', $subscribe->package_id)->first();
    }
    // check if user and package are found
    if(is_object($user) && is_object($package)){
      Mail::to($user->email)->send(new SubscribeExpire($user, $package));
    }