Giving error while including file 'php-cassandra-master/php-cassandra.php' Fatal error: Cannot declare class Cassandra\Exception, because the name is already in use in /var/www/html/php-cassandra-master/src/Exception.php on line 0

[sumeshdubey]

As soon as I included the above file it started giving me this error.
I'm using php7.0 .

Please let me know what would be the issue.