Sum and Echo Column Data from MySQL Database

Question

I am attempting to sum the data from a specific column in a MySQL database and then echo it to the page. My code is as follows:

<?php
//Trackingboard Display
$mysqli = new mysqli('localhost', 'root', '', 'disolDemo');
$query = $mysqli->query("SELECT sum(totLocMiles) FROM odoboard WHERE waybill_ID = '3'") or die($msqli->error);
$sumTot = mysql_fetch_array($query);
echo $sumTot[0];
?>

What am I doing wrong?

Answer 1

you're mixing mysqli with mysql

try this

$mysqli = new mysqli('localhost', 'root', '', 'disolDemo');
$query = $mysqli->query("SELECT sum(totLocMiles) as sum FROM odoboard WHERE waybill_ID = '3'") or die($msqli->error);

 while($row = $query->fetch_assoc())
    {  
        echo $row['sum'];

    }