Carbon-按日期比較兩個日期

Question

最近，我試圖按日期比較兩個日期。 例如，我想檢查一下學生是否在每個月的5日內支付了學費。

例如，學生在2019-01-13注冊，現在是2019-03-20因此我想系統地通知我，學生費用時間已過去7天。 以及它應該自動檢查下個月。

Answer 1

您可以定義任務計划

$schedule->command('student:fees_notify')->monthlyOn(5, '01:00');

您可以根據自己的邏輯安排命令。 它將在月份開始的第5個日期（01:00）觸發

您的命令看起來像

class StudentFeesNotify extends Command
{
   protected $signature = 'student:fees_notify';
   protected $description = 'your desc.....';

   public function handle()
   {
      // you can write your logic here
   }
}

Answer 2

它應該看起來像這樣

use Carbon\Carbon // don't forget to import carbon in your class

$days = 5;

// i would recommend to use chunk if you have a lot of records & limit this query t only people that might be subject to this alert
$students= Student::get();
$notifyList = [];

// assuming that the registration date column is created at and it's a valid date

$students->each(function($student) use (&$notifyList,$days){
  $notify = Carbon::parse($student->registration_date)->addDays($days)->lt(Carbon::now());
  if($notify){
   $notifyList[] = $student;
  }
});

該數組將包含超過其日期的用戶