I found this post at Greg Sherwood's blog:
PHP_CodeSniffer code taken and rebadged as Zend Framework code
I've often wondered if it would be alright to copy a file, remove the license notice, create a new one, and simply include the original file as well. I don't think its allowed though, as here in this restriction:
Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
the source code must retain, not "accompany".
Remember, I'm not a lawyer and this is not legal advice.