Problem z klasą mysql, Porszę o pomoc! Opcje

[virtualman]

Witam zacząłem pisać własną klase, ale mam błędy:

[PHP] pobierz, plaintext 
 ! ) Warning: mysql_query() expects parameter 2 to be resource, null given in C:\wamp\www\gra\class.php on line 47
Call Stack
#	Time	Memory	Function	Location
1	0.0006	670512	{main}( )	..\index.php:0
2	0.0052	725288	user->add( )	..\index.php:6
3	0.0054	726152	mysql->query( )	..\class.php:97
4	0.0054	726200	mysql_query ( )	..\class.php:47
 
 
( ! ) Warning: mysql_close() expects parameter 1 to be resource, null given in C:\wamp\www\gra\class.php on line 62
Call Stack
#	Time	Memory	Function	Location
1	0.0057	716504	mysql->__destruct( )	..\class.php:0
2	0.0057	716552	mysql_close ( )	..\cl
[PHP] pobierz, plaintext 

Kod PHP to:

[PHP] pobierz, plaintext 
class mysql
{
	private $host='localhost';
	private $name='root';
	private $pas='';
	private $db='game';
	private $handler;
 
	public function connect(){
		$this->handler=mysql_connect($this->host,$this->name,$this->pas)
			or die('Błąd podczas łączenia z bazą danych.');
		mysql_select_db($this->db,$this->handler)
			or die('Błąd podczas łączenia z bazą danych.');
	}
 
	public function set($host,$name,$pas,$db){
		$this->host = $host;
		$this->name = $name;
		$this->pas = $pas;
		$this->db = $db;
	}
 
	public function query($query){
		$return=mysql_query($query,$this->handler);
		return $return;
	}
 
	public function query_num($query){
		$result = mysq_query($query,$this->handler);
		return mysql_num_rows($result);
	}
 
	public function query_fetch($query){
		$result = mysql_query($query,$this->handler);
		return mysql_fetch_array($result);
	}
 
	public function __destruct(){
	mysql_close($this->handler);
	}
}
 
class user extends mysql
{
 
	private $id;
 
	public function setid($id){
		$this->id=$id;
	}
 
	public function getid(){
		return $this->id;
	}
 
	public function add($username,$password,$mail){
		$time=time();
		$data=date("d.m.Y");
		$code="";
		for($l=1; $l<=24; $l++){
			$a=rand(0,2);
				switch($a){
				    case 0:
						$code .= chr(rand(30,39));
						break;
				    case 1:
						$code .= chr(rand(65,90));
						break;
					case 2:
						$code .= chr(rand(97,122));
						break;
			}
		}
		$this->query("INSERT INTO user ('user','password','mail','date','last','activate') VALUES ('$username','$password','$mail','$data','$time',$code)");
	}
}
[PHP] pobierz, plaintext 

Proszę o pomoc!