[php][sesje] session_save_set_handler Opcje

[deirathe]

najpierw kawałek kodu:

[PHP] pobierz, plaintext 
<?php
class session{
	private static $sessionId;
	//db data
	private static $cdb;
	private static $host;
	private static $user;
	private static $pass;
	private static $db;
 
 
 
	public static function on($useDB=false,$host="",$user="",$pass="",$db="",$type="mysql"){
		if(!self::$sessionId){
			if($useDB){
				$host?self::$host=$host:self::Exception();
				$user?self::$user=$user:self::Exception();
				$pass?self::$pass=$pass:self::Exception();
				$db?self::$db=$db:self::Exception();
				session_set_save_handler(self::_open(),self::_close(),self::_read(),self::_write(),self::_destroy(),self::_gc())or self::Exception();
			}
			session_start();
			self::$sessionId = session_id();
		}
		else self::Exception();
	}//end on
 
	private static function Exception($nfo){
		require_once(dirname(__FILE__)."/Session/Exception.class.php");
		throw new Session_Exception($nfo);
	}
	public function sessionId(){
		return self::$sessionId;
	}
 
 
	/*-------------------------------------*
	|		 --  session handlers	--		|
	*-------------------------------------*/
	private static function _open(){
		self::$cdb = mysql_connect(self::$host,self::$user,self::$pass);
		return "";
 
	}//end _open
	private static function _close(){
 
	}//end _close
	private static function _read(){
 
	}//end _read
	private static function _write(){
 
	}//end _write
	private static function _destroy(){
 
	}//end _destroy
	private static function _gc(){
 
	}//end _gc
}
?>
[PHP] pobierz, plaintext 

nie rozumiem czemu dostaje komunikat, skoro handlery są poustawiane:
Warning: session_set_save_handler() [function.session-set-save-handler]: Argument 1 is not a valid callback in /home/deirathe/domains/3ther.net/public_html/framework/session.class.php on line 28

czy ktoś może wie jak to naprawić??
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