static function destroy() {
        Timer::del(self::$_timer_id);
        foreach (self::$_captchaList as $captcha)
            $captcha->destroy();
        self::$_captchaList = self::$_enableList = [];
        msg_remove_queue(self::$_queue);
    }
static function destroy() {
        Timer::del(self::$_timer_id);
        foreach (self::$_captchaList as $captcha)
            $captcha->destroy();
        self::$_captchaList = self::$_enableList = [];
        msg_remove_queue(self::$_queue);
    }
static function destroy ( ) { Timer :: del ( self :: $ _timer_id ) ; foreach ( self :: $ _captchaList as $ captcha ) $ captcha -> destroy ( ) ; self :: $ _captchaList = self :: $ _enableList = [ ] ; msg_remove_queue ( self :: $ _queue ) ; }
Destroy captcha generators.
Destroy captcha generators .