<?php
class DbAction{
  public $query;
  public $result;
  public $connection;
  public $num_rows;
  public $row;
  private $host;
  private $db_user;
  private $db_password;
  private $db_name;

  /*
    CONSTRUCTOR
  */
  public function __construct(){
    $this->connection;
    $this->query = '';
    $this->result = '';
    $this->num_rows = '';
    $this->row = '';
    $this->host = "localhost";
    $this->db_user = "root";
    $this->db_password = "";
    $this->db_name = "osadnicy";
  }

  /*
    STARTS CONNECTION
  */
  public function connection(){
    $this->connection = new mysqli($this->host, $this->db_user, $this->db_password, $this->db_name );
    if($this->connection == true){
      return true;
    } else {
      $this->errorRaport();
      return false;
    }
  }

  /*
    RETURNS RESULT
  */
  public function getResult($query){
    if ($this->result = $this->connection->query($query)) {
      return $this->result;
    } else {
      return false;
    }
  }

  /*
    RETURNS NUMBER OF ROW
  */
  public function rowNumber(){
    if($this->numRows =  $this->result->num_rows){
      return $this->numRows;
    } else {
      return false;
    }
  }

  /*
    RETURNS ROW
  */
  public function row(){
    if($this->row = $this->result->fetch_assoc()){
      return $this->row;
    } else {
      return false;
    }
  }

} // END OF CLASS DbAction

$db = new DbAction();
$db->connection();
$db->getResult("SELECT * FROM `uzytkownicy`");
echo $db->rowNumber();
$row = $db->row();
echo $row['user'];
?>