How to implement shopping cart function in php
How to implement the shopping cart function in php: first log in to the website to browse the products; then purchase the specified products, enter the shopping cart page, and change the quantity of the products, delete the products, clear the shopping cart, Continue shopping and so on; finally, you can generate an order, submit an order and other operations.
This article introduces a shopping cart code implemented in PHP, with complete functions and certain reference value
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 items in the shopping cart generally include the following: adding items, deleting items, and submitting orders;
The essence of the method Yes: Store the session in the array, add, delete, and modify the array. Each set of records in the array is information about a commodity (number, price, etc.);
The idea to solve 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, where you can change the quantity of the products, delete them products, clear the shopping cart, continue shopping, etc.; finally, generate an order, submit the order and other operations.
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:
##Login processing:
<?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";
}
?>It’s a simple login, nothing much What he said;
After he logged in, he went directly to the main page:
<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">查看账户</a> <a href="ckgwc.php">查看购物车</a> </body>
Pictures coming:
When I click add to cart:
Let’s see how it is handled (powerful comments):
<?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">提交订单</a>
</body>
The number of white grapes is 1. If I click to delete, the condition is that the number is not greater than one, so that it can be removed from the array;
Having said this, let’s take a look. Delete the page:
<?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
Submit order page, I will only come to a processing page. If you need, you can fill in the link yourself:
Let’s take a look at the effect after clicking to submit the order: 1. Reduce the fruit Inventory:
The above is the detailed content of How to implement shopping cart function in php. For more information, please follow other related articles on the PHP Chinese website!<?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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