Work with result in controller

[eluser]MaxEisley[/eluser]
I am receiving data from this:

Code:

function checkcustomer($phone, $email, $name, $surname) {
      $q = $this->db->query('SELECT *
      FROM zakaznik
      WHERE Telefon = "'.$phone.'"
      AND Email = "'.$email.'"
      AND Jmeno = "'.$name.'"
      AND Prijmeni = "'.$surname.'"');
      
      return ($q->row());
    }