Explication détaillée des exemples de création de panier d'achat à l'aide d'une session Ajax et PHP-js tutoriel-php.cn

Cet article présente principalement Ajax combiné avec une session PHP pour créer un panier en détail. Il a une certaine valeur de référence. Les amis intéressés peuvent s'y référer. J'espère que cela pourra aider tout le monde.

Code de la page Web du panier d'achat, le contenu spécifique est le suivant :

1. Interface de connexion 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>

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2. Traitement de la connexion 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";
}

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3. Page principale 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>

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4. Page de traitement des achats 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");

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5. La page de traitement des commandes calcule le prix total des fruits sélectionnés et la quantité de fruits restante. 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)
  {
    $sql = "select price from fruit where ids=&#39;{$v[0]}&#39;";
    $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=&#39;{$uid}&#39;";
  $db->Query($jianyue,0);
  
  //添加订单
  $dingdanhao = $uid+date("YmdHis");
  $t = time();
  
  $sorder = "insert into orders values(&#39;{$dingdanhao}&#39;,&#39;{$uid}&#39;,&#39;{$t}&#39;)";
  $db->Query($sorder,0);
  
  foreach($attr as $v)
  {
    $sxq = "insert into orderdetails values(&#39;&#39;,&#39;{$dingdanhao}&#39;,&#39;{$v[0]}&#39;,&#39;{$v[1]}&#39;)";
    $db->Query($sxq,0);
  }
}

echo "OK";

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6. Page du panier

<?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)
    {
      $sql = "select name,price from fruit where ids=&#39;{$v[0]}&#39;";
      $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>

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7. Page de traitement 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>

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