What exactly does it mean that it does not work? Are you getting errors, what happens when you run it?
The only requirements I see on Github are:
Server
- PHP 5.3
- Open port for the server
- PHP OpenSSL module to run a server over a encrypted connection
Client
- PHP 5.3
- Server that implements the HyBi (#8-#12) draft version
- PHP OpenSSL module to connect using SSL
If CentOs PHP version meets the requirements, I don't see a reason why it won't work.