How to implement shopping cart function in php-PHP Problem-php.cn

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.

How to implement shopping cart function in php

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>

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Picture:

##Login processing:

<?php
session_start();
include ("db.class.php");
$db = new db();
$zhang = $_POST["zhang"];
$mi = $_POST["mi"];
$sql = "select mi from yonghu WHERE zhang = &#39;{$zhang}&#39;";
$arr = $db->Query($sql);
if(!empty($zhang)&&!empty($mi)&&$mi = $arr){
    $_SESSION["zhang"] = $zhang;
    header("location:zym.php");
}
else
{
    echo "登入失败";
}

?>

Copy after login

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>

Copy after login

   <?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=&#39;zymcl.php?ids={$v[0]}&#39;>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
        $sql1="select jiage from sgbiao where ids=&#39;{$k[0]}&#39;";

        $danjia=$db->Query($sql1);

        foreach($danjia as $n)
        {

            $aa=$aa + $n[0]*$k[1];
        }


    }
    echo"数量：{$zhonglei}<br/>
价格:<mark>{$aa}元";
    ?>

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</table>

<a href="tijiao.php">查看账户</a>
<a href="ckgwc.php">查看购物车</a>

</body>

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Pictures coming:

When I click add to cart:

##The quantity and price above have changed, indicating that it has been added to the shopping 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")


?>

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Next, make the shopping cart page:

<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>

Copy after login

   <?php
    session_start();
    if(!empty($_SESSION["gwc"]))
    {
        $arr = array();
        $arr = $_SESSION["gwc"];
        //造数组
    }
    include (&#39;db.class.php&#39;);
    $db = new db();
    foreach ($arr as $v)
    {
        global $db;
        $sql = "select * from sgbiao WHERE ids = &#39;{$v[0]}&#39;";
        $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=&#39;shanchu.php?ids={$a[0]}&#39;>删除</a> </td>
    </tr> ";
//            蔬果的名称
//            单价
//            取int数量
//        这个地方也可以加索引shanchu.php?sy={$v}
        }
    }
    ?>

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</table>

<a href="tijiao.php">提交订单</a>
</body>

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Above picture:

You can see that the number of big apples is 4. If I click delete, the condition is that there are big apples and the number is greater than one. Click delete to reduce the number by one:

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

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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
$sye = "select zhanghu from yonghu WHERE zhang = &#39;{$zhang}&#39;";
$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
    $sql1="select jiage from sgbiao where ids=&#39;{$k[0]}&#39;";

    $danjia=$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)
    {
        $skc = "select sgname,kucun from sgbiao WHERE ids=&#39;{$v[0]}&#39;";
        //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 = &#39;{$zhang}&#39;";
    $db->query($skcye,0);
    //扣除库存
    foreach($ann as $v)
    {
        $skckc = "update sgbiao set kucun = kucun-{$v[1]} WHERE ids=&#39;{$v[0]}&#39;";
        //水果代号$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");
    $sdd = "insert into dingdan VALUES (&#39;{$ddh}&#39;,&#39;$zhang&#39;,&#39;$time&#39;)";
    $db->query($sdd,0);
    //添加订单内容
    foreach ($ann as $v)
    {
        $sddxq = "insert into ddneirong VALUES (&#39;&#39;,&#39;$ddh&#39;,&#39;{$v[0]}&#39;,&#39;{$v[1]}&#39;)";
        $db->query($sddxq,0);
    }


}
else
{
    echo "钱不够";
    exit;
}

Copy after login

Like this Come on, most of the functions of the shopping cart have been implemented;
Let’s take a look at the effect after clicking to submit the order:
1. Reduce the fruit Inventory:

2. Add order:

3. Add order content:

4. Deduct the purchaser’s Account balance:

The above is the contents of the shopping cart
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