Select MAX Value from MySQL Database using PHP

$query="SELECT MAX(torder+0) as maxnum FROM triage_order  ;";
$result = mysql_query($query) or die ("couldn't execute query $query ");
$nrows = mysql_num_rows($result);
while($row= mysql_fetch_array($result)) {
       echo "TORDER =" . $row['maxnum'];
       echo "<BR>";
}