Havenard

<?

    class mySession {
        var $path = 'C:\\WINDOWS\\TEMP'; // define the folder to save the sessions cache
        var $id = '';
        var $fd = NULL;
        function __construct($id = '') {
            global $_MYSESSION;
            $this->id = $_COOKIE['MYSESSION'];
            if (empty($this->id) || !eregi('^[a-f0-9]{32}$', $this->id) || ($this->id != md5($id))) {
                if (empty($id)) {
                    $i = 1;
                    do {
                        $this->id = md5($_SERVER['REMOTE_ADDR'] . $_SERVER['HTTP_USER_AGENT'] . microtime() . $i++);
                    } while (file_exists("{$this->path}/MYSESSION{$this->id}"));
                }
                else {
                    $this->id = md5($id);
                }
                header("Set-Cookie: MYSESSION={$this->id}");
            }
            $this->path = "{$this->path}/MYSESSION{$this->id}";
            @ $_MYSESSION = unserialize(file_get_contents($this->path));
            @ $this->fd = fopen($this->path, 'w');
            while (!$this->fd) {
                sleep(10);
                @ $this->fd = fopen($this->path, 'w');
            }
        }
        function __destruct() {
            global $_MYSESSION;
            fwrite($this->fd, serialize($_MYSESSION));
            fclose($this->fd);
        }
    }
    new mySession();

?>