<?php
$con=mysqli_connect("connection details");
 
$listNumber = $_GET['listNumber'];

$sql = "select * from listItem where listNum = '$listNumber'";
$getSum = "select sum(price) AS cartTotal from listItem where listNum = '$listNumber'";
$res = mysqli_query($con,$sql);
$sum = mysqli_query($con,$getSum);
$row = mysqli_fetch_assoc($sum);
$cartSum= $row('cartTotal');
 
$result = array();
 
while($row = mysqli_fetch_array($res)){
array_push($result,
array('name'=>$row[0],
'price'=>$row[1]
));
}
 
echo json_encode(array("result"=>$result));
echo '{"sum":' . $cartSum. '}';
mysqli_close($con);