<?php
define("DB_HOST", "127.0.0.1");
define("DB_NAME", "test");
define("DB_USER", "test_user");
define("DB_PASS", "test_pswd");

function __autoload($class_name){
    $file_name = "models/" . $class_name . ".php";
    // echo $mod;
    if (file_exists($file_name)) {
        include_once($file_name);
    } else
        echo "File doesn't exists";

}

<?php
require_once("../conf/conf.php");


 abstract class Db {
    private static $DB_HOST = DB_HOST;
    private static $DB_USER = DB_USER;
    private static $DB_PASS = DB_PASS;
    private static $DB_NAME = DB_NAME;

    //protected $dbc;
     protected $query;

     protected $data = array();

    function __construct(){
        $dbc = new mysqli(self::$DB_HOST, self::$DB_USER, self::$DB_PASS, self::$DB_NAME);

        if ($dbc->connect_errno)
            die($dbc->error);
        else{
            //$this->dbc->query("set NAMES utf8");
            $stmt = $dbc->stmt_init();
            $stmt->prepare("set NAMES cp1251");
            $stmt->prepare($this->query);
            $stmt->execute();

            $result = $stmt->get_result();
            $stmt->close();
            $dbc->close();

            $this->data = $result->fetch_assoc();

        }


    }

    abstract function setQuery();

}

<?php
require_once("Db.php");

class Info extends Db{
    function __construct(){
       $this->setQuery();

       parent::__construct();

       // echo var_dump($this->data);
    }

    function setQuery(){
        $this->query = "SELECT full_name from users WHERE  id = 1";
    }

    function __get($param){
        return $this->$param;
    }

}
//$obj = new Info();

require_once("conf/conf.php");
$obj = new Info();
echo var_dump($obj->data);