<?php
include '../../../include/conf.php';
$id = $_POST['id'];
$get_prod = mysqli_query($conn, "select * from shop_cart_admin_demo_1 where id='$id'");
$set_prod=mysqli_fetch_array($get_prod, MYSQLI_ASSOC);
//add 1 qty to the product
$qty = $set_prod['qty']+1;
$totprice = $qty * $set_prod['price'];
$totprice = number_format((float)$totprice, 1, '.', '');
$update = "update shop_cart_admin_demo_1 set `qty` = '$qty', `totprice` = '$totprice' where id = '$id'";
mysqli_query($conn, $update);
$arr = array("qty"=>$qty);
echo json_encode($arr);
?>