Building Login API First we will build our Login API. For this I am going to use the same project that we created in the last iOS Registration Form Tutorial. Come inside includes folder and add two new methods. <?php /** * Created by PhpStorm. * User: Belal * Date: 04/02/17 * Time: 7:51 PM */ class DbOperation { private $conn; function __construct() { require_once dirname(__FILE__) . '/Constants.p