Since the WP-Cron didn't work on my server, I wrote one by my own. I'm just wondering if this works in your environments too.
Usage: add scripts which you like to run on schedule via the admin option menu.
The plugin uses the system() function, and if the adding scripts contain relative paths in their codes, it seems it doesn't work.
The plugin also doesn't return errors when a script didn't run properly.
If you have solutions for this, it would be greatly appreciated. Any information would be appreciated as well.