php添加购物车 

<!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>
</head>

<body>

<h1>商品列表</h1>

<table width="100%" border="1" cellpadding="0" cellspacing="0">
   <tr>
       <td>水果代号</td>
        <td>水果名称</td>
        <td>水果价格</td>
        <td>水果产地</td>
        <td>水果库存</td>
        <td>操作</td>
    </tr>
    
    <?php
   session_start();
   include("../fengzhuang/DBDA.class.php");
   $db = new DBDA();
   
   $sql = "select * from fruit";
   $arr = $db->Query($sql);
   foreach($arr 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='add.php?ids={$v[0]}'>加入购物车</a></td>
    </tr>";
   }
   ?>
    
</table>

<?php
var_dump($_SESSION["gwc"]);
?>


</body>
</html>




<!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>
</head>

<body>
<h1>购物车详情</h1>

<table width="100%" border="1" cellpadding="0" cellspacing="0">
   <tr>
       <td>水果代号</td>
        <td>购买数量</td>
        <td>操作</td>
    </tr>
    
    <?php
   session_start();
   
   $arr = array();
   if(!empty($_SESSION["gwc"]))
   {
      $arr = $_SESSION["gwc"];
   }
   
   foreach($arr as $v)
   {
      echo "<tr>
       <td>{$v[0]}</td>
        <td>{$v[1]}</td>
        <td></td>
    </tr>";
   }
   ?>
    
</table>

</body>
</html>




<?php
session_start();

$ids = $_GET["ids"];

/*$arr = array(
   array("k001",10),
   array("k002",2),
   array("k003",5)
);*/

//1.第一次点击添加购物车
//2.如果购物车中没有该商品
//3.如果购物车中有该商品

if(empty($_SESSION["gwc"]))
{
   //1.第一次点击添加购物车
   $arr = array(
      array($ids,1)
   );
   $_SESSION["gwc"]=$arr;
}
else
{
   //不是第一次点击
   //判断购物车中是否存在该商品
   $arr = $_SESSION["gwc"];
   
   $chuxian = false;
   foreach($arr as $v)
   {
      if($v[0]==$ids)
      {
         $chuxian = true;
      }
   }
   
   if($chuxian)
   {
      //3.如果购物车中有该商品
      /*foreach($arr as $v)
      {
         if($v[0]==$ids)
         {
            $v[1] = $v[1]+1;
         }
      }*/
      
      for($i=0;$i<count($arr);$i++)
      {
         if($arr[$i][0]==$ids)
         {
            $arr[$i][1]+=1;
         }
      }
      
      $_SESSION["gwc"] = $arr;
   }
   else
   {
      //2.如果购物车中没有该商品
      $asg = array($ids,1);
      $arr[] = $asg;
      $_SESSION["gwc"] = $arr;
   }
   
}

header("location:main.php");
posted @ 2017-03-06 10:42  周全264  阅读(471)  评论(0)  编辑  收藏  举报