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Cron Job Tutorial: Crontab Scheduling Syntax and Script Example

Dec 08, 2010, 21:02 (0 Talkback[s])
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"Crontabs is very useful when doing website maintenance. You can use this feature for the following purposes:

"1. Deleting all files in a certain folder at regular intervals. If you accept user-uploaded files, then eventually it will clog your web hosting server. If you do not regularly delete these files, they will consume a lot of disk space and can slow down your website.

"2. Deleting files of a specific type at regular intervals. You can also choose to delete files of a specific type, instead of deleting all of the files in the folder. If you have PHP, HTML and MP3 files together inside the folder, you can delete only the MP3 files.

"3. Regularly backing up your MySQL database. This is one of the most important webmaster tasks. By using crontabs or the cron job feature, you can create a PHP script that will back up a selected MySQL database, and have it execute automatically executed at a specific, regular interval (e.g monthly, yearly, etc).

"This tutorial will focus on creating a cron PHP script application, then configuring your cron hosting feature to execute these scripts automatically."

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