Thousands of core.xxxx files- easy way to remove?

This weekend I had httpd, mysql, and ftp all fail on me at the same time, and now all of my users are stuck with thousands of core.xxxx files in all of their websites. Is there any easy way to remove all of these files?

 

That doesn't do anything.

 

I think I got it:

PHP:

find / \( -name "core.***" \) -print -exec rm -rf {} \;