One time custom cron schedule in laravel

问题

I want to run a cron just once at a custom date & time entered by the user in a form. What is the best way to do this?

I found that a custom cron can be scheduled in laravel like this

->cron(‘* * * * * *’);             

Run the task on a custom Cron schedule.

But I could not find the time format what the * mean.

Or much simpler, can it be done like this by adding the date and time.

->at('28/04/2020 13:00');

How can this be done?

回答1:

you can easily do that with when() method

    $schedule->command('command')->when(function (){
        return Carbon::create(2020,4,28,13)->isPast();
    });

回答2:

Laravel documentation has in detail description on that in here Task Scheduling

You can add your scheduling logic in a given file

App\Console\Kernel

Currently, laravel have the kind of functionality that exactly match your requirement but it provide a ->monthlyOn(23, '13:00'); via which you can achieve your requirement, It Run the task every month on the 23th at 13:00

protected function schedule(Schedule $schedule)
    {
        $schedule->call(function () {

        })->->monthlyOn(23, '13:00');
    }

The above code runs the task every month on the 23th at 13:00 hours server time.

For your purpose you can change cron scheduling as given below

00 13 28 APR Fri *

1st * Minute
2nd * Hour
3rd * Day of the Month
4th * Month of the Year
5th * Day of the Week
6th * Year    

来源：https://stackoverflow.com/questions/61094820/one-time-custom-cron-schedule-in-laravel