Mysql Database with PDO

Connecting to Database

try
	{
		$conn = new PDO ( "mysql:host=localhost; dbname=pdo" , "root", "");
		$conn -> setAttribute (PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
		echo "Connected Successfully";
	}
	catch (PDOException $e)
	{
		echo "Connection Failed...". $e -> getMessage();
	}

Connection Failed...SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: NO)