Incremental Backups / Versioned backups using PHP

Question

I'm trying to backup a folder containing several folders and files to a remote location (will be uploading zipped files). Is there any existing scripts that may help me, which checks if the files have been modified after the date of the last backup, and only backs up files created / modified after that?

The current size of the data is around 1gb, and I expect adding 50mb-200mb each month

Also, what would be the best way to extract the state of the files on a specific date?

Answer 1

incremental backup script using php:

http://web4u.mirrors.phpclasses.org/package/4841-PHP-Manage-backup-copies-of-files-.html