I do not, off-hand, see some of the more recent consistency levels implemented as constants in the tookit? Such as TWO, THREE, LOCAL_QUORUM, and EACH QUORUM. Are they easily available by adding additional constants?
Actually they are there already. Take a look at https://github.com/kallaspriit/Cassandra-PHP-Client-Library/blob/master/thrift/packages/cassandra/cassandra_types.php and you can find the constants you will need to use.
Added constants for new cassandra consistency levels solving #15
Added the constants, You are welcome to fix such issues and create a pull request :)