Configuration and usage of php5 pdo

extension_dir="C:Program Files (x86)PHPext"
[PHP_PDO]
extension=php_pdo.dll
[PHP_PDO_MYSQL]
extension=php_pdo_mysql.dll
 or
[PHP_PDO_MSSQL]
 extension=php_pdo_mssql.dll

Open phpinfo and you will find that pdo and corresponding extensions are already there. In this way, you can use PDO for data connection access.