PHP总订单
我有一个显示带有单选按钮的项目的站点。我想让 PHP 代码在用户提交代码时显示总计。
以下是我目前拥有的代码以及商店中每件商品的价格。
<?php
$keybored = $_POST["keybored"];
$mouse = $_POST["mouse"];
$harddrive = $_POST["harddrive"];
$desktop = $_POST["desktop"];
$keyboredprice = 5.00;
$mouseprice = 3.50;
$hardriveprice = 20.00;
$desktopprice = 100;
$total = $prices;
echo "$total";
?>
我正在使用的 HTML 代码发布在下面，用于网上商店。
<!DOCTYPE html>
<html>
<head>
<style>
body {background-color: lightblue;}
h1 {color: gray;}
h2 {color: white;
border-size: 1;
width: 200px;
border: 15px solid black;
padding: 50px;
margin: 10px;}
p {color: white;
font-size: 200%;}
img {width:350px;height:300px;}
</style>
</head>
<body>
<form action="purchase.php" method="post">
<h1> Welcome to computer parts store</h1>
<h2>Keybored</h1>
<img src="keybored.jpg">
<p> Select how many <br>
<input type="radio" name="keybored" value="1"">1<br>
<input type="radio" name="keybored" value="2">2<br>
<input type="radio" name="keybored" value="3"> 3<br> <br>
</p>
<h2>Mouse</h1>
<img src="mouse.jpg">
<p> Select how many <br>
<input type="radio" name="mouse" value="1"">1<br>
<input type="radio" name="mouse" value="2">2<br>
<input type="radio" name="mouse" value="3"> 3<br> <br>
</p>
<h2>HarDrive</h1>
<img src="harddrive.jpeg" >
<p> Select how many <br>
<input type="radio" name="harddrive" value="1">1<br>
<input type="radio" name="harddrive" value="2">2<br>
<input type="radio" name="harddrive" value="3"> 3<br> <br>
</p>
<h2>Desktop</h1>
<img src="Desktop.jpg">
<p> Select how many <br>
<input type="radio" name="desktop" value="1">1<br>
<input type="radio" name="desktop" value="2">2<br>
<input type="radio" name="desktop" value="3"> 3<br> <br>
</p>
幕布斯60546542回答
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慕容3067478
简单：数量*价格。<?php $keybored = $_POST["keybored"] ?? 0;$mouse = $_POST["mouse"] ?? 0;$harddrive = $_POST["harddrive"] ?? 0;$desktop = $_POST["desktop"] ?? 0;$keyboredprice = 5.00;$mouseprice = 3.50;$hardriveprice = 20.00;$desktopprice = 100;$total = ($keybored * $keyboredprice) + ($mouse * $mouseprice) + ($hardrive * $hardriveprice) + ($desktop * $desktopprice);echo "$total";PHP 是松散类型的，会为您将表格数量字符串转换为整数，并且还会在乘法中保留浮点数价格。如果未提交任何表单元素，这将使用 php7 空合并运算符 (??) 将默认数量设置为 0。 -
杨魅力
在尝试向用户显示其价值之前，您需要计算价格。$price = $keyboredprice + $mouseprice + $hardriveprice + $desktopprice; $total = $price echo "$total"
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