PHP使用cookie实现简单的购物车功能

https://blog.csdn.net/a345263950/article/details/81907275

学习php过程中尝试用cookie做一下购物车，参考和学习网上的做法，主要用cookie记录一个二维数组

----------------------------------------------------

array(

'商品id1'=>array('名字'，'库存等'),

'商品id2'=>array('名字'，'库存等')

);

function.php 函数页面

<?php
// 加入购物车
function addCart($gid, $gname)
{
// 第一次点击创建一个数组
if (empty(unserialize($_COOKIE['cart']))) {
$arr = array($gid => array($gname, 1));
setcookie('cart', serialize($arr));
} else {
$arr = unserialize($_COOKIE['cart']);
// 如果没有这个商品，添加一个商品数组
if ($arr[$gid][0] != $gname) {
$arr[$gid] = array($gname, 1);
setcookie('cart', serialize($arr));
} else { //如果商品存在数量加1
$arr[$gid][1]++;
setcookie('cart', serialize($arr));
}
}
}
// 删除一个商品
// $del是get请求的删除id $del = $_GET['del'];
function delCart($shop_car, $del)
{
unset($shop_car[$del]);
setcookie('cart', serialize($shop_car));
echo '<script>window.location.href = "showcar.php"</script>';
}
//清空购物车全部
function delAll()
{
if (isset($_GET['clean'])) {
if ($_GET['clean'] == 'all') {
setcookie('cart', '', time() - 3600);
echo '<script>alert("清空成功");window.location.href="showcar.php";</script>';
}
}
}
// 计算总价格
function totalPrice($shop_car)
{
require_once 'mysqli.php';
$price = 0;
// $kk是随便定义的一个数组名字
foreach ($shop_car as $kk) {
$sql = 'select price from one where gname="' . $kk[0] . '"';
$select = $db->query($sql);
$result = $select->fetch_object();
$price += $kk[1] * $result->price;
}
return $price;
}
```
shop.php 商品页面
```
<?php
include 'mysqli.php';
$select = $db->query('select * from one');
$result = $select->fetch_assoc();
while ($result) {
echo '<div style="float:left; width:30%;margin-left:1.5%;text-align:center">
<img src="' . $result['url'] . '" style="width:200px;height:200px"/>';
echo '<p>商品id: ' . $result['id'] . ' 名称: ' . $result['gname'] . ' 价格: $' . $result['price'] . '</p>';
echo '<a href="addcar.php?gid=' . $result['id'] . '">加入购物车</a></div>';
$result = $select->fetch_assoc();
}
echo '<div style="margin:0 auto; width:150px; font-size:22px">
<a target="_blank" href="showcar.php">查看购物车</a>
</div>';

shop.php 商品页面

<?php
include 'mysqli.php';
$select = $db->query('select * from one');
$result = $select->fetch_assoc();
while ($result) {
echo '<div style="float:left; width:30%;margin-left:1.5%;text-align:center">
<img src="' . $result['url'] . '" style="width:200px;height:200px"/>';
echo '<p>商品id: ' . $result['id'] . ' 名称: ' . $result['gname'] . ' 价格: $' . $result['price'] . '</p>';
echo '<a href="addcar.php?gid=' . $result['id'] . '">加入购物车</a></div>';
$result = $select->fetch_assoc();
}
echo '<div style="margin:0 auto; width:150px; font-size:22px">
<a target="_blank" href="showcar.php">查看购物车</a>
</div>';

addcar.php 加入购物车

<?php
ini_set('error_reporting', 'E_ALL & ~E_NOTICE');
require_once 'mysqli.php';
require_once 'function.php';
$gid = $_GET['gid'];
$sql = 'select gname from one where id=' . $gid;
$select = $db->query($sql);
// 查询错误返回
if (!$select) {
header('location:shop.php');
exit;
}
$result = $select->fetch_assoc();
$gname = $result['gname'];
// 查询为空返回，避免空商品加到购物车
if (empty($gname)) {
header('location:shop.php');
exit;
}
addCart($gid, $gname);
//setcookie('cart','',time()-3600);
header('location:shop.php');

showcar.php 购物车展示页面

<?php
require_once 'function.php';
ini_set('error_reporting', 'E_ALL & ~E_NOTICE');
$shop_car = unserialize($_COOKIE['cart']);
echo '<h1>购物车</h1>';
if (empty($shop_car)) {
echo '购物车为空';
echo '<br /><a href="shop.php">返回首页购物</a>';
exit;
}
// 展示
$key = array_keys($shop_car);
for ($i = 0; $i < count($shop_car); $i++) {
echo '商品：' . $shop_car[$key[$i]][0] . ' 数量：' . $shop_car[$key[$i]][1] . '<br />';
echo '<a href="showcar.php?del=' . $key[$i] . '">删除商品</a><br />';
}
// 总价格
echo '<br />总价格：$' . totalPrice($shop_car);
if (isset($_GET['del'])) {
$del = $_GET['del'];
if ($_GET['del'] == $del) {
delCart($shop_car, $del);
}
}
// 清空按钮
echo '<br /><a href="showcar.php?clean=all">清空购物车</a><br />';
if (isset($_GET['clean'])) {
if ($_GET['clean'] == 'all') {
delAll();
}
}
```
conn.php
```
<?php
define('host','localhost');
define('user','root');
define('pwd','');
define('dbname','goods');

conn.php

<?php
define('host','localhost');
define('user','root');
define('pwd','');
define('dbname','goods');

mysqli.php

<?php
include 'conn.php';
$db = new mysqli(host,user,pwd,dbname);

PHP使用cookie实现简单的购物车功能

https://blog.csdn.net/a345263950/article/details/81907275

学习php过程中尝试用cookie做一下购物车，参考和学习网上的做法，主要用cookie记录一个二维数组

----------------------------------------------------

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