public function __construct ($pId)
    {
        $info = mysql_fetch_assoc(mysql_query("SELECT * FROM players WHERE id=".$pId)) or die("blad zapytania");
        $this -> id = $info['id'];
        $this -> nick = $info['nick'];
        $this -> pass = $info['pass'];
        $this -> email = $info['email'];..... i tak dalej
    .....
    }

Class Player
{
    public $id;
    public $nick;
    public $pass;
    public $email;
...
}

new Player($id);

$pl = getUserData($_SESSION['email'], $_SESSION['pass']);
if (!isset($pl['id']))
{
echo('Niema takiego gracza!');
}
require_once 'class/Class.Player.php';
$player = new Player($pl['id']);

print_r($pl);

echo mysql_error();

ysql_fetch_assoc(): supplied argument is not a valid MySQL result resource in [b]class/Class.Player.php[/b] on line [b]48[/b]
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1

function getUserData ($email, $pass)
{
    return mysql_fetch_assoc(mysql_query("SELECT id, lpv FROM players WHERE email='".$email."' AND pass='".hexPass($pass)."'"));
}