class cls
    {
        public $name;
        public $password;
        public $referer;
        public $time;
        
        public function __construct($name, $password)
        {
            $this->name = $name;
            $this->password = $password;
            $this->referer = $_SERVER['PHP_SELF'];
            $this->time = time();
        }
        
        public function __sleep()
        {
            
            return $this;
        }
        
        public function __wakeup()
        {
            return $this;
        }
    }

    function __autoload($className)
    {
        require_once 'class.' . $className . '.php';
        
    }
    
        $obj = new cls('login', 'password');
     
     $text = serialize($obj);
     echo 'After serialization ';
     var_dump($text);
     Echo '<br />';
     $fd=fopen('cls.obj' , 'w');
     if(!$fd) exit('Can\' create file!');
     fwrite($fd,$text);
     fclose($fd);
    
    $fd = fopen('cls.obj', 'r');
    
    $text = fread($fd, filesize('cls.obj') );
    echo 'What was read from file: ' . $text;
    $obj = unserialize($text);
    fclose($fd);
    echo '<br /> And the result:';
    var_dump($obj);