function dobackupdb()
{
    global $SITENAME, $CURUSER, $DEFAULTBASEURL, $backupdb_interval, $queries, $query_stat;
    set_time_limit(1200);
    $result = mysql_query("show processlist") or sqlerr(__FILE__, __LINE__);
    while ($row = mysql_fetch_array($result)) {
        if (($row["Time"] > 100) || ($row["Command"] == "Sleep")) {
            $sql = "kill " . $row["Id"] . "";
            mysql_query($sql) or sqlerr(__FILE__, __LINE__);
        }
    }
    ignore_user_abort(1);
    /* Your db-globals */
    global $mysql_host, $mysql_user, $mysql_pass, $mysql_db, $DEFAULTBASEURL, $backup_dir, $backupdb_interval;
    $host = 'localhost';
    $db = 'installer';
    $user = 'root';
    $pass = 'xx';

    /* Change to the name of your backup directory */
    $backupdir = '/backup';
    /* Compute day, month, year, hour and min. */
    $today = getdate();
    $day = $today['mday'];
    if ($day < 10) {
        $day = "0$day";
    }
    $month = $today['mon'];
    if ($month < 10) {
        $month = "0$month";
    }
    $year = $today['year'];
    $hour = $today['hours'];
    $min = $today['minutes'];
    $sec = "00";
    /* Add path to your backup dir here, eg; /var/www/ or C://AppServ/www/ */
    $dir = "C://AppServ/www/";
    /*
Execute mysqldump command.
It will produce a file named $db-$year$month$day-$hour$min.gz
under $DOCUMENT_ROOT/$backupdir
getenv('DOCUMENT_ROOT'),
*/

    // ///////windows mysqldump
    system(sprintf('c:\AppServ\mysql\bin\mysqldump --opt -h %s -u %s -p%s %s  > %s/%s/%s-%s-%s-%s.sql', $host, $user, $pass, $db, getenv('DOCUMENT_ROOT'), $backupdir, $db, $day, $month, $year));
    $name = $db . "-" . $day . "-" . $month . "-" . $year . ".gz";
    $date = date("Y-m-d");
    $day = date("d");
    /*
    //////////Liux mysqldump
system(sprintf( '/usr/bin/mysqldump --opt -h %s -u %s -p%s %s  > %s/%s/%s-%s-%s-%s.sql', $host,  $user,  $pass,  $db,  getenv('DOCUMENT_ROOT'),  $backupdir,  $db,  $day,  $month,  $year ));
    $name = $db."-".$day."-".$month."-".$year.".gz";$date = date("Y-m-d");
    $day = date("d");
    */
    write_log("autobackupdb----------------------Auto Back Up Complete--------------------");
}