php - converted to string database -

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) wrote method display contents of database public 

function magazyn() {         //return 'magazyn';         $this->magazyn = $this->conn->prepare("select * `products` order `nazwa`");         //$this->magazyn->bind_param('ssss', $id, $nazwa, $kategoria, $sn);         $this->magazyn->execute();         $this->magazyn->store_result();         return $this->magazyn;          if ($this->magazyn->num_rows > 0) {             echo "jest cos w magazynie";         } else {             echo "brak produktw w bazie";         }     }      function __tostring() {         return $this->magazyn;     }  $web = new web(); echo $web->magazyn();

and in site have error:

catchable fatal error: object of class mysqli_stmt not converted string in...


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