Php-based website monitoring software

[armstrong]

I'm looking for a script that can monitor changes on any URL I specify. Specifically, I'd like it to be able to detect:

- changes to the page,
- presence of a specific text string
- absence of a specific text string

I'd like it to be php-based so that I can upload it to my site, and call it regularly via cron, whether or not I'm online. Any reportable event can then be emailed to me automatically.

Anyone know of something like this? Thanks!

 

[redhippo]

YES, i have seen one. will look for it ASAP:gn: