Originally from here: 
http://code.google.com/p/phpwebsocket/
and written by georgenava

Modified to work on newer version (76) of the spec for websockets using a handshaking class written by Andrea Giammarchi here:
http://webreflection.blogspot.com/2010/06/websocket-handshake-76-simplified.html

This should still work with 75, but not tested.