Daly updating mysql DB tables (upto 5) from content of up to 5 pages of a website

Need to write PHP 5 script that would visit up to 5 password protected pages (authentication must be stored in the file) on a website and update content of up to 5 mysql 5.1 DB tables based on the new information that appears on those web pages since the last visit. If format of the pages changes in any way and/or update is impossible, a warning email should be sent to administrator. A detailed log of the updates must be created and maintained. Daly emails must be sent to admin with all update summary info.