try {
	$query  = "SELECT CONCAT(firstName, lastName) AS name ";
	$query .= "FROM people AS p ";
	$query .= "WHERE p.age=:age ";
	$query .= "ORDER BY name DESC ";

	$statement = $pdoRef->prepare($query);

	$statement->bindParam(":age", $age, PDO::PARAM_INT);

	if (!$statement->execute())
		throw new Exception("Statement did not execute");

	$result = $statement->fetchAll();

	if (count($result) === 0)
		throw new Exception("0 Results");

	foreach ($result as $person) {
		//
	}

} catch (PDOException $ex) {
	// do something with $ex->getMessage();
} catch (Exception $ex) {
	// do something with $ex->getMessage();
}