I don't believe PDOStatement
will work out of the box with the Cassandra PHP driver.
Years ago (around 2011), there was a Cassandra PDO driver available on Google Code which worked with Thrift -- https://code.google.com/archive/a/apache-extras.org/p/cassandra-pdo.
It was forked by Orange to provide CQL support -- https://github.com/Orange-OpenSource/YACassandraPDO. However, the last release was all the way back to 2014 and it doesn't look like there has been any work on it since 2015.
As a side note, the Cassandra PHP driver has been in maintenance mode for a number of years now with the last release (v1.3.2) going back to 2017. Although we continue to accept pull requests from contributors, I wouldn't recommend doing any new project that uses this driver given it has not been in active development for years. Cheers!