Each PDO driver now has it's own class, extending %\PDO%, containing (a copy of) driver specific elements %Pdo\Dblib%, %Pdo\Firebird%, and %Pdo\Odbc% are just children, without any changes. %Pdo\Mysql% has %getWarningCount()% defined on it %Pdo\Pgsql% and %Pdo\Sqlite% have a whole bunch of constants and methods %pdo_oci% has been moved to PECL: %https://github.com/php/pecl-database-pdo_oci% A new factory method, %PDO::connect% returns an object representing one of the new subclasses: