crontab?? wtf?

No, tole je skripta za backup moje baze, vsak dan. Prvi del me še ne zanima tako zelo. Ampak predvsem kaj hoče povedat v drugem delu? Mi lahko razložite? Kak crontab? Kje? Kako? Zakaj? itd..

IMPORTANT!!! I recommend that you run this outside of your
web directory, unless you manually want to run this script. If you do upload it inside your web
directory source tree, I would at least apply Apache access control on that directory. You don't
want people downloading your raw databases!

This script is meant to be setup on a crontab and run on a weekly basis
You will have to contact your system administrator to setup a cron tab for this script
Here's an example crontab:

0 0-23 * * * php /path/to/thisdirectory/dbsender.php > dev/null

crontab = task scheduler ...

Verjetno bos moral kontaktirat server admina in se z njim zmenit, kako je s crontabom ali kaksnih drugim task shedulerjem.