$input = JFactory::getApplication()->input;
    $db = JFactory::getDbo();

    echo '<h2>Google Calendar Sync Scheduled Task</h2>';

    //make sure it's a legit request

    if (!isset($GLOBALS['com_pbbooking_data']['config']->google_cal_sync_secret) || $GLOBALS['com_pbbooking_data']['config']->google_cal_sync_secret != $google_cal_sync_secret)
    {
            die('Invalid secret.');
    }

if (!flock($fp, LOCK_EX)) {
        //could not get exclusive access to lock file
        fclose($fp);
        die('Process already running');
    }
    echo '<p>Starting Sync....</p>';