goatoh_training_android/server/modules/common.mod.php

<?php

class
Common
{
  var $db;

  function
  __construct ()
  {
    $config = include (__DIR__ . '/config.php');

    $db_host = $config['host'];
    $db_port = $config['port'];
    $db_user = $config['user'];
    $db_pass = $config['pass'];

    $this -> db = new mysqli ($db_host, $db_user, $db_pass, 'goatoh_training', $db_port);
  }
}