function _wpr_queue_management_handler()
{
    global $wpdb;
    $prefix = $wpdb->prefix;
    if (isset($_GET['subact'])) {
        $act = $_GET['subact'];
        switch ($act) {
            case 'truncate_queue':
                if (check_admin_referer("_wpr_truncate_queue")) {
                    _wpr_queue_truncate();
                    wp_redirect("admin.php?page=_wpr/queue_management");
                }
                break;
            case 'delete_sent_emails':
                if (check_admin_referer("_wpr_delete_sent_mail")) {
                    _wpr_queue_delete_sentmail();
                    wp_redirect("admin.php?page=_wpr/queue_management");
                }
                break;
        }
    }
    $number_of_pending = _wpr_queue_get_pendingmail_count();
    $number_of_sent = _wpr_queue_get_sentmail_count();
    $queue_table_size = _wpr_queue_size();
    $numberOfEmailsPerPage = intval($_GET['emails_per_page']);
    $numberOfEmailsPerPage = $numberOfEmailsPerPage == 0 ? 50 : $numberOfEmailsPerPage;
    $start = intval($_GET['start']);
    $start = $start != 0 ? $start : 1;
    /*$getEmailsFromQueue = sprintf("SELECT * FROM {$prefix}_wpr_queue ORDER BY id desc LIMIT $start,$numberOfEmailsPerPage;");
    	$emailsInQueue = $wpdb->query($getEmailsFromQueue);*/
    _wpr_set("number_of_pending", $number_of_pending);
    _wpr_set("emails_in_queue", $emailsInQueue);
    _wpr_set("number_of_sent", $number_of_sent);
    _wpr_set("queue_table_size", $queue_table_size);
}
function _wpr_queue_management_cron()
{
    $whetherAnotherInstanceIsRunning = get_option("_wpr_queue_management_cron_status");
    if ($whetherAnotherInstanceIsRunning == "running") {
        return;
    }
    delete_option("_wpr_queue_management_cron_status");
    add_option("_wpr_queue_management_cron_status", "running");
    $sizeOfQueueTable = _wpr_queue_size();
    if ($sizeOfQueueTable >= WPR_MAX_QUEUE_TABLE_SIZE) {
        _wpr_queue_delete_sentmail();
        //usually that fixes the problem..
    }
    delete_option("_wpr_queue_management_cron_status");
    add_option("_wpr_queue_management_cron_status", "stopped");
}