Implement simple php shopping cart code
Here we provide you with a simple php shopping cart code, from adding shopping products to making purchases. In mall development, this function is indispensable
The specific analysis is as follows:
The operations on the items in the shopping cart generally include the following: adding items, deleting items, and submitting orders;
The essence of the method is: store the session in the array, Add, delete, and modify the array. Each set of records in the array is information about a product (number, price, etc.);
The idea of solving the shopping cart is to use session to record a two-dimensional array . One dimension represents each product, and two dimensions include the product ID, the quantity of the product, etc. You can add it by yourself. Anyway, it is two-dimensional. You can add as many product attributes as you want.
The operation process of the shopping cart: First, log in to the website to browse the products; then, purchase the specified products and enter the shopping cart page. On this page, you can change the quantity of the products, delete the products, clear the shopping cart, Continue shopping and so on; finally, generate orders, submit orders and other operations.
Related learning recommendations: PHP programming from entry to proficiency
Please see the powerful comments for details;
Log in first;
<body> <h1>登入页面</h1> <form action="dengrucl.php" method="post"> <p>帐号：<input type="text" name="zhang"/></p> <p>密码：<input type="text" name="mi"/></p> <input type="submit" value="登入"/> </form> </body>
Picture:
<?php
session_start();
include ("db.class.php");
$db = new db();
$zhang = $_POST["zhang"];
$mi = $_POST["mi"];
$sql = "select mi from yonghu WHERE zhang = '{$zhang}'";
$arr = $db->Query($sql);
if(!empty($zhang)&&!empty($mi)&&$mi = $arr){
$_SESSION["zhang"] = $zhang;
header("location:zym.php");
}
else
{
echo "登入失败";
}
?><body>
<h1>长腿璇购物商城</h1>
<table border="1" cellpadding="0" cellspacing="0" width="100%" >
<tr>
<td>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();
$_SESSION["zhang"] = "xiaoming";//不做登入的情况下，直接存sessiion
include ("db.class.php");
$db = new db();
$sql = "select * from sgbiao";
$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='zymcl.php?ids={$v[0]}'>加入购物车</a>
</td>
</tr>";
}
?>
<?php
//这里显示的是 购物车有多少产品，和产品的总价格
$ann=array();
if(!empty($_SESSION["gwc"]))
{
$ann=$_SESSION["gwc"];
}
$zhonglei = count($ann);
$aa=0;
foreach($ann as $k)
{
$k[0];//水果代号
$k[1];//水果数量
$sql1="select jiage from sgbiao where ids='{$k[0]}'";
$danjia=$db->Query($sql1);
foreach($danjia as $n)
{
$aa=$aa + $n[0]*$k[1];
}
}
echo"数量：{$zhonglei}<br/>
价格:<mark>{$aa}元";
?>
</table>
<a href="tijiao.php" rel="external nofollow" rel="external nofollow" >查看账户</a>
<a href="ckgwc.php" rel="external nofollow" >查看购物车</a>
</body>
<?php
session_start();
//
$ids = $_GET["ids"];
if(empty($_SESSION["gwc"]))
{
//如果点击的购物车是空的（第一次添加）
//如果购物车里是空的，造二维数组，
$arr = array(
array($ids,1)
//一维数组，取ids，第一次点击增加一个
);
$_SESSION["gwc"]=$arr;
//扔到session里面
}
else
//这里不是第一次点击
{
//先判断购物车里是否已经有了该商品，用$ids
$arr = $_SESSION["gwc"];
//把购物车的状态取出来
$chuxian = false;
//定义一个变量；用来表示是否出现，默认是未出现
foreach ($arr as $v) {
//便利他
//如果这里面有这件商品
if ($v[0] == $ids) //如果取过来的$v[0]（商品的代号）等于$ids那么就证明购物车中已经有了这一件商品
{
$chuxian = true;
//如果出现，直接把chuxian改成true
}
}
if($chuxian)
{
//购物车中有此商品
for($i=0;$i<count($arr);$i++)
{
if($arr[$i][0] == $ids)
{
//把点到的商品编号加1
$arr[$i][1] += 1;
}
}
$_SESSION["gwc"] = $arr;
}
else
{
//这里就只剩下：购物车里有东西，但是并没有这件商品
$asg = array($ids,1);
//设一个小数组
$arr[] = $asg;
$_SESSION["gwc"]=$arr;
}
}
header("location:zym.php")
?>
<body>
<h1>查看购物车</h1>
<table width="100%" border="1"cellspacing="0" cellpadding="0">
<tr>
<td>商品名称</td>
<td>商品单价</td>
<td>商品数量</td>
<td>操作</td>
</tr>
<?php
session_start();
if(!empty($_SESSION["gwc"]))
{
$arr = array();
$arr = $_SESSION["gwc"];
//造数组
}
include ('db.class.php');
$db = new db();
foreach ($arr as $v)
{
global $db;
$sql = "select * from sgbiao WHERE ids = '{$v[0]}'";
$att = $db->query($sql);
foreach ($att as $a)
{
echo "<tr>
<td>{$a[1]}</td>
<td>{$a[2]}</td>
<td>{$v[1]}</td>
<td><a href='shanchu.php?ids={$a[0]}'>删除</a> </td>
</tr> ";
// 蔬果的名称
// 单价
// 取int数量
// 这个地方也可以加索引shanchu.php?sy={$v}
}
}
?>
</table>
<a href="tijiao.php" rel="external nofollow" rel="external nofollow" >提交订单</a>
</body>
<?php
session_start();
$ids = $_GET["ids"];
$arr = $_SESSION["gwc"];
//var_dump($arr);
//取索引2（数量）
foreach ($arr as $key=>$v)
{
if($v[0]==$ids)
{
if($v[1]>1){
//要删除的数据
$arr[$key][1]-=1;
}
else{
//数量为1的情况下，移除该数组
unset($arr[$key]);
}
}
}
$_SESSION["gwc"] = $arr;
//记得扔到session里面
header("location:ckgwc.php");
//删除完跳转回去High energy! !
Submit order page, I will only come to a processing page. If you need, you can fill in the link yourself:
<?php
session_start();
include ("db.class.php");
$db = new db();
//判断用余额是否满足
$zhang = $_SESSION["zhang"];
//获取到用户名
$sye = "select zhanghu from yonghu WHERE zhang = '{$zhang}'";
$ye = $db->query($sye);
$ye[0][0];//这是余额
$ann=array();
if(!empty($_SESSION["gwc"]))
{
$ann=$_SESSION["gwc"];
}
$zhonglei = count($ann);
$aa=0;//总价格
foreach($ann as $k)
{
$k[0];//水果代号
$k[1];//水果数量
$sql1="select jiage from sgbiao where ids='{$k[0]}'";
$danjia=$db->Query($sql1);
foreach($danjia as $n)
{
$aa=$aa + $n[0]*$k[1];
}
}
//判断余额是否满足
if($ye[0][0]>=$aa)
{
//钱够,判断库存
foreach($ann as $v)
{
$skc = "select sgname,kucun from sgbiao WHERE ids='{$v[0]}'";
//水果代号$v[0]
$akc = $db->query($skc);
$akc[0][1];//库存
//比较是否满足库存
if($akc[0][1]<$v[1])
{
echo "{$akc[0][0]}库存不足";
//退出
exit;
}
}
//提交订单：
//i. 从用户账户中扣除本次购买的总价格
//ii. 从商品库存中扣除本次每种商品的购买数量
//iii. 向订单表和订单内容表中加入本次购买的商品信息
//扣除账户余额
$skcye = "update yonghu set zhanghu = zhanghu-{$aa} WHERE zhang = '{$zhang}'";
$db->query($skcye,0);
//扣除库存
foreach($ann as $v)
{
$skckc = "update sgbiao set kucun = kucun-{$v[1]} WHERE ids='{$v[0]}'";
//水果代号$v[0]
$db->query($skckc,0);
}
//添加订单信息
//取当前时间
$time = time();
//自动生成订单号
$ddh = date("YmdHis");
$sdd = "insert into dingdan VALUES ('{$ddh}','$zhang','$time')";
$db->query($sdd,0);
//添加订单内容
foreach ($ann as $v)
{
$sddxq = "insert into ddneirong VALUES ('','$ddh','{$v[0]}','{$v[1]}')";
$db->query($sddxq,0);
}
}
else
{
echo "钱不够";
exit;
}
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