我的代码出了什么问题？它仅适用于列表中的一个项目。 [英] What's wrong with my code? It's working only for one item in list.

问题描述

我的代码有什么问题？

我试图更新购物车中每件商品的数量，但它并不适用于列表中的每个产品。

 <？php  
  global   $ con ; 
 
 include（  includes / db.php）; 
 
  $ ip  = getIp（）; 
 
 if（isset（$ _ POST ['  update_cart']））{ 
 
  $ qty  = $ _POST [' 数量']; 
 
  $ update_qty  =  更新购物车设置qty ='$ qty'其中ip_add ='$ ip'; 
 
  $ run_qty  = mysqli_query（$ con，$ update_qty）; 
 
 $ _SESSION ['  qty'] = $ qty; 
 
  $ total  = $ total * $ qty; 
 
} 
 ？>  

我尝试了什么：

 < ;？php  
  global   $ con ; 
 
 include（  includes / db.php）; 
 
  $ ip  = getIp（）; 
 
 if（isset（$ _ POST ['  update_cart']））{ 
 
  $ qty  = $ _POST [' 数量']; 
 
  $ update_qty  =  更新购物车设置qty ='$ qty'其中ip_add ='$ ip'; 
 
  $ run_qty  = mysqli_query（$ con，$ update_qty）; 
 
 $ _SESSION ['  qty'] = $ qty; 
 
  $ total  = $ total * $ qty; 
 
} 
 ？>  

解决方案

CON ;

include（ includes / db.php）;

ip = getIp（）;

if（isset（

_POST [' update_cart']））{

Whats wrong with My code?
I tried to update quantity for each product in shopping cart, but it's not working for every product in list separately.

<?php
  global $con;
  
  include("includes/db.php");
  
  $ip = getIp();

  if(isset($_POST['update_cart'])){
  
  $qty = $_POST['qty'];

  $update_qty = "update cart set qty='$qty' where ip_add='$ip'";
  
  $run_qty = mysqli_query($con, $update_qty);

  $_SESSION['qty']=$qty;

  $total = $total*$qty;
  
  }
?>

What I have tried:

<?php				
  global $con;
					
  include("includes/db.php");
					
  $ip = getIp();

  if(isset($_POST['update_cart'])){
					
    $qty = $_POST['qty'];

    $update_qty = "update cart set qty='$qty' where ip_add='$ip'";
					
    $run_qty = mysqli_query($con, $update_qty);

    $_SESSION['qty']=$qty;

    $total = $total*$qty;
					
  }
?>

解决方案

con; include("includes/db.php");

ip = getIp(); if(isset(

_POST['update_cart'])){

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