class MSSQLConnection extends PDO
{	
	function __construct($conection)
	{	
		if ($conection)
		{
			try
			{
				$dsn      = "dblib:dbname={$conection->database};host={$conection->server}";
				$user     = $conection->user;
				$password = $conection->password;
				parent::__construct($dsn, $user, $password);
	
				$rez = $this->prepare (' 
											SET CONCAT_NULL_YIELDS_NULL ON 
											SET ANSI_WARNINGS ON 
											SET ANSI_PADDING ON 
											SET ANSI_DEFAULTS ON 
											SET AUTOCOMMIT OFF
										');
				$rez->execute();

				$this->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
			} catch (PDOException  $e)
			{
			}
		}
		else
		{
			throw new Exception("Invalid db Coneection settings for '{$conection}'!");
		}
	}
}

// $this->ms_con => object class MSSQLConnection 
....
$tr = $this->ms_con->prepare('INSERT INTO www_test(c1) VALUES (\'eee-'.rand(1,100000).'\')');
$tr->execute();

$this->ms_con->beginTransaction();
$tr = $this->ms_con->prepare('INSERT INTO www_test(c1) VALUES (\'eee-'.rand(1,100000).'\')');
$tr->execute();
$this->ms_con->commit();

$tr = $this->ms_con->prepare('BEGIN TRAN T1');
$tr->execute();
$tr = $this->ms_con->prepare('INSERT INTO www_test(c1) VALUES (\'eee-'.rand(1,100000).'\')');
$tr->execute();
$tr = $this->ms_con->prepare('COMMIT TRAN T1');
$tr->execute();

$tr = $this->ms_con->prepare('INSERT INTO www_test(c1) VALUES (:v1)');
$tr->execute(array(':v1' => 'eee-'.rand(1,100000)));