购物车以php原生cookie实现

index.php //入口文件

<?php
/**
 * @name index.php
 * @decs
 * @author 老猫 <18368091722@163.com>
 * Updated on: 2019/5/30 9:49
 */
include "goods.php";

　　conn.inc.php //数据库连接常量设置

<?php
/**
 * @name conn.inc.php
 * @decs 数据库常量配置
 * @author 老猫 <18368091722@163.com>
 * Updated on: 2019/5/30 9:43
 */
define("HOST",'13.232.50.253');
define("USER",'liuyu');
define("PWD",'94492474');
define("DBNAME",'onecms');

　　mysqli.php //数据库连接

<?php
/**
 * @name mysqli.php
 * @decs 数据库连接
 * @author 老猫 <18368091722@163.com>
 * Updated on: 2019/5/30 9:44
 */
include 'conn.inc.php';
$mysqli=new mysqli(HOST,USER,PWD,DBNAME);
if($mysqli->connect_errno){
    die('数据库连接出现错误，请检查配置'.$mysqli->connect_error);
}

　　goods.php //商品展示

<?php
/**
 * @name goods.php
 * @decs
 * @author 老猫 <18368091722@163.com>
 * Updated on: 2019/5/30 9:46
 */
header("Content-type:text/html;charset=utf-8");
include "mysqli.php";
?>
<div style='width:800px;float:none'>
    <h1>商品列表</h1>
    <!--    显示当前系统时间-->
    <h3><p id="demo"></p>
        <script>
            var myVar=setInterval(function(){myTimer()},1000);
            function myTimer() {
                var d = new Date();
                document.getElementById("demo").innerHTML = d.toLocaleTimeString();
            }
        </script>
    </h3>
    <form method="get" action="">
        <table style="100%" border="1">
            <tr>
                <td>
                    <select name="gid">
                        <option value="0">请选择商品</option>

                        <?php
                        /**
                         * @name show
                         * @decs 无限级分类
                         * 关联model：
                         * @param $fid
                         * @param $i
                         * @author 老猫 <18368091722@163.com>
                         * Updated on: 2019/5/30 10:12
                         */
                        function show($fid,$i)
                        {
                            global $mysqli;//全球变量关键字，将前面的变量作用域使其在函数内生效
                            $sql = "select *from goodstype where fid=$fid";
                            $result = $mysqli->query($sql);
                            $str=" ";
                            $i++;
                            for($n=1;$n<$i;$n++) {
                                $str .= "---";
                            }
                            $id=isset($_GET["gid"])?$id=$_GET["gid"]:"";
                            ?>
                            <?php
                            while ($row = $result->fetch_assoc()) {
                                ?>
                                <option <?php if($id==$row['id']){echo "selected";}?> id="<?php echo $str.$row["classname"] ?>" value="<?php echo $row["id"] ?>">
                                    <?php echo $str.$row["classname"] ?>
                                </option>
                                <?php
                                show($fid=$row["id"],$i);
                                ?>
                                <?php
                            }
                        }
                        show(0,0);

                        ?>
                        <input id="select" type="submit" value="查询"></select></td></tr>
        </table>
    </form>
</div>
<div style="float: none;width: 600px">
    <?php
    $id=isset($_GET["gid"])?$id=$_GET["gid"]:"";
    if(!empty($id)){
        $sql="select *from goods where goodstypefid=$id or goodstypefstr like '%$id%' and checkinfo=1 and delstate=0";
    }else{
        $sql="select *from goods";
    }
    $result=$mysqli->query($sql);
    ?>
    <table border="1" cellpadding="3" cellspacing="0" width="60%">
        <tr bgcolor="skyblue">
            <?php
            while($row=$result->fetch_assoc()){
                ?>
                <td >
                    <image width="200px" height="200px" src="<?php echo $row["picurl"]?>"></image>
                    <a title="查看商品详细信息" href="goodsshow.php?id=<?php echo $row["id"]?>"><?php echo $row["title"]?></a>
                </td>
                <?php
            }
            ?>
        </tr>
    </table>
</div>

　　goodsshow.php //商品详情页展示

<?php
/**
 * @name goodsshow.php
 * @decs
 * @author 老猫 <18368091722@163.com>
 * Updated on: 2019/5/30 10:15
 */
header("Content-type:text/html;charset=utf-8");
include "mysqli.php";
?>
<?php
$id=isset($_GET["id"])?$_GET["id"]:1;
$sql="update goods set hits=hits+1 where id=".$id;
$mysqli->query($sql);
$sql="select *from goods where id=".$id;
$result=$mysqli->query($sql);
while($row=$result->fetch_assoc()){
?>
<div>
    <span><?php echo $row["title"] ?></span>
    <hr>
    <image src="<?php echo $row["picurl"] ?>" width="200"></image>
    <br>
    数量:-<input type="text" id="buynum" value="1">+
    价格:
    <del>市场价:<?php echo $row["marketprice"] ?></del>
    出售价:<i style="color: red"><?php echo $row["salesprice"] ?></i>
    <input type="hidden" id="id" value="<?php echo $row["id"] ?>">
    <hr>
    内容:<?php echo $row["content"] ?><br>

    <a href="javascript:;" onclick="buynow()">立刻购买</a>  <a href="javascript:;" onclick="addshoppingcart()">加入购物车</a>
    <?php
    }
    ?>
</div>
<script src="jquery.min.js"></script>

    <script>
    //立即购买
    function buynow(){
        //先添加到购物车再进行跳转到购买页面
        addshoppingcart("buy");
    }
    //添加到购物车
    function addshoppingcart(a){
        $.ajax({
            url:"shoppingcart.php?a=addshoppingcart",
            type:"post",
            data:{'buynum':$("#buynum").val(),'id':$("#id").val()},
            dataType:"html",
            success:function (data) {
            if(a=="buy"){
                location.href="shoppingcart.php?a=buynow";
            }else{
                if(data){
                    alert("添加购物车成功!");
                }
            }
        }
        })
    }
</script>

　　shoppingcart.php //购物车功能

<?php
/**
 * @name shoppingcart.php
 * @decs
 * @author 老猫 <18368091722@163.com>
 * Updated on: 2019/5/30 10:20
 */

header("Content-type:text/html;charset=utf-8");
include "mysqli.php";
$a=isset($_GET["a"])?$_GET["a"]:"";
//添加购物车
if($a=="addshoppingcart"){
    $buynum=$_POST["buynum"];
    $id=$_POST["id"];
//    echo "<script>alert($buynum+$id)</script>";
    if(!empty($_COOKIE["shoppingcart"]))
        $shoppingcart=unserialize($_COOKIE["shoppingcart"]);
    else
        $shoppingcart=array();
    if(isset($id) && isset($buynum)){
        $id=intval($id);
        $buynum=intval($buynum);
        $shoppingcart[]=array($id,$buynum);
    }
    setcookie('shoppingcart',serialize($shoppingcart));//商品属性进行序列化保存到cookie中
    return true;
}elseif($a=="buynow") {
    //下面写购物车页面
    if (!empty($_COOKIE["shoppingcart"])) {
        ?>
        <table width="36%" border="1" cellspacing="0" cellpadding="0">
            <tr bgcolor="#87ceeb">
                <td width="20%">商品ID</td>
                <td width="35%" height="30">商品名称</td>
                <td width="25%">购买数量</td>
                <td width="15%">价格</td>
                <td width="5%">操作</td>
            </tr>
            <tr>
                <td height="10" colspan="4"></td>
            </tr>
            <?php
            $totalprice = "";
            $shoppingcart = unserialize($_COOKIE["shoppingcart"]);
            foreach ($shoppingcart as $key => $value) {
                $keys = array($key);
                ?>
                <tr>
                    <td><?php echo $value[0] ?></td>
                    <td height="30">
                        <?php
                        $sql = "select *from goods where id=" . intval($value[0]);
                        $result = $mysqli->query($sql);
                        $row = $result->fetch_assoc();
                        $totalprice += $row["salesprice"] * $value[1];
                        echo '<a href="goodsshow.php?cid=' . $row['goodstypeid'] . '&id=' . $row['id'] . '" class="title" target="_blank">' . $row['title'] . '</a>';
                        ?>
                    </td>
                    <td><?php echo $value[1] ?></td>
                    <td><?php echo $row["salesprice"] * $value[1] ?></td>
                    <td> <a href="shoppingcart.php?a=delone&key=<?php echo $key ?>" onclick="">取消</a></td>
                </tr>
                <?php
            }
            ?>
        </table>
        <hr>
        <span style="float: left;width: 250px;height: 150px">
        总价格:<?php echo $totalprice ?><a href="">下一步</a>  <a href="shoppingcart.php?a=empty">清空购物车</a>

    </span>
        <?php
    }
}elseif($a=="delone"){
    $key=$_GET["key"];
    $shoppingcart=unserialize($_COOKIE["shoppingcart"]);
    unset($shoppingcart[$key]);
    if(empty($_COOKIE)){
        setcookie($shoppingcart,"",time()-3600);
    }elseif(empty($shoppingcart)){
        setcookie("shoppingcart",serialize($shoppingcart));
        echo "<div class='shoppingcartempty'>您的购物车目前没有商品！3秒后跳回首页......</div>";
        header("Refresh:3;url=goods.php");
    }else{
        setcookie("shoppingcart",serialize($shoppingcart));
        header("location:shoppingcart.php?a=buynow");
    }

    exit();
}//清空购物车
elseif($a=="empty"){
    //清除整个cookie保存的商品信息
    unset($_COOKIE["shoppingcart"]);
    setcookie("shoppingcart","",time()-3600);
    echo "<div class='shoppingcartempty'>您的购物车目前没有商品！3秒后跳回首页......</div>";
    header("Refresh:3;url=goods.php");
}

　　

以上摘自php中文网