Codeigniter-创建手动调度程序

Question

I want to create a scheduler in Codeigniter as in, at 21:24 "this" record should be updated.

I have searched a lot but the ultimate answer was to create a cron job.

Can I dynamically create cron job in Codeigniter?

Actually I was thinking to create a class in which a method will keep checking:

1. Time.
2. Anything to update.

How to create such a function most efficiently, as a request may come from n amount of users at random times to do a specific job at different time?

Answer 1

I would not dynamically create cron jobs.

Instead I would have one script that is called through cron once a minute (once every 10 minutes...) and store all the jobs in a database with the time they are supposed to run.

Then in your script you can check the database and see if there are any jobs that need to run at this time exactly or between the time of the last check and now.

Answer 2

To create a CRON job from PHP use the exec command. This should work (untested, on mobile)

exec(crontab -l | { cat; echo "0 0 0 0 0 php your_php_script.php"; } | crontab -);

Alternatively if you want to schedule a single job better to us the 'at' command.