WHMCS licensing addon suspension cron hook

<?php
/**
 * WHMCS Licensing Cron Hook
 * Automatically suspends overdue
 * WHMCS Support & Updates Addons
 * @license GPL V3 <http://www.gnu.org/licenses/>
 * 
 * Copyright (C) 2013  Robert Gregor
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * See <http://www.gnu.org/licenses/>.
 */
add_hook('DailyCronJob', 1, 'suspend_overdue_support_updates');
function suspend_overdue_support_updates  ()
{
    $message = 'Cron Job: Licensing: Suspending Overdue Support & Updates';
    logActivity($message);
    echo $message . PHP_EOL;
    $query = "SELECT `configoption7` FROM `tblproducts`
            WHERE `servertype` = 'licensing'";
    $result = mysql_query($query);
    $support_updates = array();
    while ($row = mysql_fetch_assoc($result)) {
        $string = $row['configoption7'];
        $addon_array = explode('|', $string);
        if ($addon_array[0] > 0 ) {
            $support_updates[] = $addon_array[0];
        }
    }
    $support_updates = array_unique($support_updates);
    if (empty($support_updates)) {
        $message = 'Cron Job: Licensing: No Support & Updates Addons Found';
        echo $message . PHP_EOL;
        logActivity($message);
        return;
    }
    $date = date('Y-m-d');
    $query = "
        UPDATE `tblhostingaddons`
        SET `status` = 'Suspended'
        WHERE `addonid` IN (" . implode(',', array_map('intval', $support_updates)) . ')'."
        AND `nextduedate` < '{$date}'
        AND `status` = 'Active'";
    mysql_query($query);
    $updated = mysql_affected_rows();
    $message = 'Cron Job: Licensing: Suspended '.$updated . ' Overdue Support & Updates';
    logActivity($message);
    echo $message . PHP_EOL;
}