new PDO($dsn, $user, $pass, array(
	PDO::ATTR_EMULATE_PREPARES => false
))

pdo_mysql

PDO Driver for MySQL => enabled
Client API version => mysqlnd 5.0.8-dev - 20102224 - $Revision: 321

Client API version => 5.5.29

$pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);

$pdo->setAttribute(PDO::ATTR_STRINGIFY_FETCHES, false);