<?php
class Db {
    private $_host = 'localhost';
    private $_user = 'root';
    private $_pass = '';
    private $_name = 'qdb';
    private $_limit = '';

    private $dbh = NULL;

    private function __construct() {
        $this->_limit = Qdb::$config['site_qpp'];
        $this->dbh = new PDO("mysql:host=".$this->_host.";dbname=".$this->_name, $this->_user, $this->_pass);
        $this->dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    }
}