<?php
class DB extends PDO
{
  public function __construct($dsn, $username = null, $password = null, array $options = null)
  {
    parent::__construct($dsn, $username, $password, $options);
  }

  static function openConnection()
  {
    $conn = null;
    try {
      $dataAccess = parse_ini_file("../configs/db.ini", true);

      $conn = new PDO(
        "mysql:host=" . $dataAccess["ZEDAT"]["host"] .
          ";dbname=" . $dataAccess["ZEDAT"]["database"] . ";charset=utf8",
        $dataAccess["ZEDAT"]["user"],
        $dataAccess["ZEDAT"]["passwd"],
        array(PDO::ATTR_PERSISTENT => false)
      );

      $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
      $conn->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
    } catch (PDOException $exc) {
      echo $exc->getMessage();
    }
    return $conn;
  }

  static function closeConnection(&$conn)
  {
    $conn = null;
  }
}