PHP查询减法

Question

你好我试图从工作表中减去接受的出价是一个int，并从客户表中减去信用，但由于某种原因，它将信用行更新为-21而不是78，因为接受的出价是= 22。任何想法为什么会这样？

表：https://imgur.com/a/Sighm

<?php
session_start();
require 'config.php';


$id = $_SESSION['login_user'];
$jobid    = $_POST['job_id'];
$poster_id    = $_POST['poster_id'];
$accepted_bidder    = $_POST['accepted_bidder'];
$accepted_bid    = (int) $_POST['accepted_bid'];

$query = "SELECT credit FROM `customer` WHERE email_adress = '$id'";

$result = $conn->query($query);

//echo $result;
//echo $accepted_bid;
$updated_credit = (int)$result- $accepted_bid;
//echo $updated_credit;


$query2   = "UPDATE job SET start_escrow = '1' WHERE job_id = '$jobid'";
$success = $conn->query($query2);

$query3   = " UPDATE customer SET credit = '$updated_credit' WHERE email_adress = '$id'";
$success3 = $conn->query($query3);

$poster_id = $_POST['poster_id'];

if (!$success) {
    die("Couldn't enter data: ".$conn->error);

}
 header("location: myjobs.php");

echo "Thank You For Contacting Us <br>";

$conn->close();




?>

Answer 1

基本PHP错误：

您在行尾

缺少最终;

$updated_credit = (int)$result- $accepted_bid

......应该是

$updated_credit = (int)$result- $accepted_bid;