Detailed tutorial on creating a shopping cart with Ajax+PHP-JS Tutorial-php.cn

This time I will bring you a detailed tutorial on making a shopping cart with Ajax+PHP. What are the precautions for making a shopping cart with Ajax+PHP? The following is a practical case, let’s take a look.

Shopping cart web page code, the specific content is as follows

1. Login interface login.php

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="../jquery-1.11.2.min.js"></script>
<title>无标题文档</title>
</head>
<body>
<p>用户名：<input type="text" id="uid" /></p>
<p>密码：<input type="text" id="pwd" /></p>
<input type="button" value="登录" id="btn" />
</body>
<script type="text/javascript">
$("#btn").click(function(){
  var uid = $("#uid").val();
  var pwd = $("#pwd").val();
  $.ajax({
      url:"loginchuli.php",
      data:{u:uid,p:pwd},
      type:"POST",
      dataType:"TEXT",
      success: function(data){
        if(data.trim()=="OK")
        {
          window.location.href="main.php" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ;
        }
        else
        {
          alert("用户名或密码错误");
        }
      }
    })
  })
</script>
</html>

Copy after login

2. Login processing page loginchuli.php

<?php
session_start();
include("../DBDA.class.php");
$db = new DBDA();
$uid = $_POST["u"];
$pwd = $_POST["p"];
$sql = "select password from login where username=&#39;{$uid}&#39;";
$mm = $db->StrQuery($sql);
if($mm==$pwd && $pwd!="")
{
  $UserName = $_POST["uid"];
  $_SESSION["uid"]=$uid;
  echo "OK";
}
else
{
  echo "NO";
}

Copy after login

3 .Main page main.php

<?php
session_start();
include("../DBDA.class.php");
$db = new DBDA();
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title><br />
<style type="text/css">
.list{ width:100%; height:30px; margin-top:10px; text-align:center; line-height:30px; vertical-align:middle}
</style>
</head>
<body>
<p style="width:100%; height:100px; background-color:#6CC">
  <h1 style="float:left">大苹果商城</h1>
  <a style="float:right; margin-top:40px" href="zhuxiao.php">注销</a>
</p>
<br />
<p style="width:100%; height:600px">
  <p id="left" style="width:20%; float:left">
    <a href="main.php"><p class="list">浏览商品</p></a>
    <a href="zhanghu.php"><p class="list">查看账户</p></a>
    <a href="gouwuche.php"><p class="list">查看购物车</p></a>
  </p>
  
  <p id="right" style="width:80%; float:left">
<?php
  $agwc = array();
  if(!empty($_SESSION["gwc"]))
  {
    $agwc = $_SESSION["gwc"];
  }
  $zhonglei = count($agwc);
  $sum = 0;
  foreach($agwc as $v)
  {
    $sql = "select price from fruit where ids=&#39;{$v[0]}&#39;";
    $danjia = $db->StrQuery($sql);
    $sum = $sum +$danjia*$v[1];
  }
  echo "<p>购物车中有:{$zhonglei}种商品，总价格为:{$sum}元.</p>";
  ?>
    <table width="100%" border="1" cellpadding="0" cellspacing="0">
    <tr>
      <td>代号</td>
      <td>水果名称</td>
      <td>水果价格</td>
      <td>源产地</td>
      <td>库存量</td>
      <td>操作</td>
    </tr>
 <?php   
    $sql = "select * from fruit";
    $attr = $db->Query($sql);
    
    foreach($attr as $v)
    {
      echo "<tr><td>{$v[0]}</td>
      <td>{$v[1]}</td>
      <td>{$v[2]}</td>
      <td>{$v[3]}</td>
      <td>{$v[4]}</td>
      <td><a href=&#39;goumai.php?code={$v[0]}&#39;>购买</a></td></tr>";
    }
    ?>    
    </table>
  </p>
</p>
</body>
</html>

Copy after login

4. Purchase processing page goumai.php

<?php
session_start();
$code = $_GET["code"];
if(empty($_SESSION["gwc"]))
{
  //第一次点击购买
  $attr = array(
    array($code,1)
  );
  $_SESSION["gwc"] = $attr;
}
else
{
  //不是第一次点击购买
  $attr = $_SESSION["gwc"];
  $bs=0;
  foreach($attr as $k=>$v)
  {
    if($v[0]==$code)
    {
      $bs=1;
      $attr[$k][1] = $attr[$k][1]+1;
    }
  }
  //如果没有在数组里面出现
  if($bs==0)
  {
    $shuzu = array($code,1);
    $attr[] = $shuzu;
  }
  
  $_SESSION["gwc"]=$attr;
  
}
header("location:main.php");

Copy after login

5. Order processing page, calculate the total price of the selected fruits and the remaining amount of fruits. dingdan.php

<?php
session_start();
include("../DBDA.class.php");
$db = new DBDA();
$uid = $_SESSION["uid"];
$attr = array();
if(!empty($_SESSION["gwc"]))
{
  $attr = $_SESSION["gwc"];
}
//看下两个条件是否都满足
$bs = true;
//判断余额是否满足
  //根据用户名找余额
  $syue = "select account from login where username=&#39;{$uid}&#39;";
  $yue = $db->StrQuery($syue);
  
  //根据购物车数组取总金额
  $sum = 0;
  foreach($attr as $v)
  {
    $sql = "select price from fruit where ids='{$v[0]}'";
    $danjia = $db->StrQuery($sql);
    $sum = $sum +$danjia*$v[1];
  }
  if($yue<$sum)
  {
    $bs = false;
    echo "YEBUZU";
    exit;
  }
  
//判断库存是否满足
foreach($attr as $v)
{
  $skucun = "select name,numbers from fruit where ids=&#39;{$v[0]}&#39;";
  $akucun = $db->Query($skucun);
  if($akucun[0][1]<$v[1])
  {
    $bs = false;
    echo "{$akucun[0][0]}库存不足！";
    exit;
    
  }
}
//添加订单，减库存，减余额
if($bs)
{
  //减库存
  foreach($attr as $v)
  {
    $sql = "update fruit set numbers = numbers-{$v[1]} where ids=&#39;{$v[0]}&#39;";
    $db->Query($sql,0);
  }
  
  //减余额
  $jianyue="update login set account=account-{$sum} where username='{$uid}'";
  $db->Query($jianyue,0);
  
  //添加订单
  $dingdanhao = $uid+date("YmdHis");
  $t = time();
  
  $sorder = "insert into orders values('{$dingdanhao}','{$uid}','{$t}')";
  $db->Query($sorder,0);
  
  foreach($attr as $v)
  {
    $sxq = "insert into orderdetails values('','{$dingdanhao}','{$v[0]}','{$v[1]}')";
    $db->Query($sxq,0);
  }
}
echo "OK";

Copy after login

6. Shopping cart page

<?php
session_start();
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title><br />
<style type="text/css">
.list{ width:100%; height:30px; margin-top:10px; text-align:center; line-height:30px; vertical-align:middle}
</style>
<script src="../../jquery-1.11.2.min.js"></script>
</head>
<body>
<p style="width:100%; height:100px; background-color:#6CC">
  <h1 style="float:left">大苹果商城</h1>
  <a style="float:right; margin-top:40px" href="zhuxiao.php">注销</a>
</p>
<br />
<p style="width:100%; height:600px">
  <p id="left" style="width:20%; float:left">
    <a href="main.php"><p class="list">浏览商品</p></a>
    <a href="zhanghu.php"><p class="list">查看账户</p></a>
    <a href="gouwuche.php"><p class="list">查看购物车</p></a>
  </p>
  
  <p id="right" style="width:80%; float:left">
    <table width="100%" border="1" cellpadding="0" cellspacing="0">
    <tr>
      <td>商品名称</td>
      <td>商品单价</td>
      <td>购买数量</td>
      <td>操作</td>
    </tr>
<?php
    include("../DBDA.class.php");
    $db = new DBDA();
    $attr=array();
    if(!empty($_SESSION["gwc"]))
    {
      $attr = $_SESSION["gwc"];
    }
    
    foreach($attr as $k=>$v)
    {
      $sql = "select name,price from fruit where ids='{$v[0]}'";
      $ashuiguo = $db->Query($sql);
    
      echo "<tr><td>{$ashuiguo[0][0]}</td><td>{$ashuiguo[0][1]}</td><td>{$v[1]}</td><td><a href=&#39;shanchu.php?sy={$k}&#39;>删除</a></td></tr>";
      
    }
    
    ?>
    </table>
    <p id="tj">提交订单</p><p id="ts"></p>
  </p>
</p>
<script type="text/javascript">
$("#tj").click(function(){
    $.ajax({
        url:"dingdan.php",
        dataType:"TEXT",
        success: function(data){
            if(data.trim()=="OK")
            {
              alert("购买成功");
            }
            else if(data.trim()=="YEBUZU")
            {
              $("#ts").html("余额不足");
              $("#ts").css("color","red");
            }
            else
            {
              $("#ts").html(data);
              $("#ts").css("color","red");
            }
          }
      });
  })
</script>
</body>
</html>

Copy after login

7. Shopping cart page deletion processing page shanchu.php

<?php
session_start();
$sy = $_GET["sy"];
$attr = $_SESSION["gwc"];
if($attr[$sy][1]>1)
{
  $attr[$sy][1] = $attr[$sy][1]-1;
}
else
{
  unset($attr[$sy]);
  $attr = array_values($attr);
}
$_SESSION["gwc"]=$attr;
header("location:gouwuche.php");
8.账户余额页面zhanghu.php
<?php
session_start();
$uid = $_SESSION[&#39;uid&#39;];
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title><br />
<style type="text/css">
.list{ width:100%; height:30px; margin-top:10px; text-align:center; line-height:30px; vertical-align:middle}
</style>
</head>
<body>
<p style="width:100%; height:100px; background-color:#6CC">
  <h1 style="float:left">大苹果商城</h1>
  <a style="float:right; margin-top:40px" href="zhuxiao.php">注销</a>
</p>
<br />
<p style="width:100%; height:600px">
  <p id="left" style="width:20%; float:left">
    <a href="main.php"><p class="list">浏览商品</p></a>
    <a href="zhanghu.php"><p class="list">查看账户</p></a>
    <a href="gouwuche.php"><p class="list">查看购物车</p></a>
  </p>  
  <p id="right" style="width:80%; height:150px; float:left">
<?php
    include("../DBDA.class.php");
    $db = new DBDA();
    $sql = "select Account from login where UserName=&#39;{$uid}&#39;";
    $result = $db->strQuery($sql);
    
    echo ("您的账户中还剩余".$result);
  ?>
  </p>
</p>
</body>
</html>

Copy after login

I believe you have mastered the method after reading the case in this article , for more exciting content, please pay attention to other related articles on the php Chinese website!