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我试图让一个PHP脚本，将计算的总里程由租车客户驱动（每英里0.12美分），它乘该值的天数，他们租来的汽车（$ 15一天），并在文本框中显示该总计以及他们的姓名和地址。我相当新的PHP，我不知道如何将这个想法投影到PHP代码。我有这个代码的完全html版本的工作，但我缺乏与PHP的知识来翻译它。PHP乘法和减法脚本
任何人对我如何写这个脚本有任何想法？
<?php
if(isset($_POST['submit'])) {
$x = $_POST['bOdometer'];
$y = $_POST['eOdometer'];
$z = $_POST['daysRented'];
$miles = $y - $x; {
$result = (15 * $z) + ($miles * 0.12);
echo $result; } }
?>
<body>
<div align="center">
<hr>
<br>
<form method="post" name id="Main">
<input type="text" id="name" name="customerName" placeholder="Enter your name here" size="30px">
<br><br>
<input type="text" id="address" name="customerAddress" placeholder="Enter your street address here" size="50px">
<br><br>
<input type="text" id="city" name="customerCity" placeholder="What city do you live in?" size="30px">
<br><br>
<input type="number" id="zip" name="customerZip" placeholder="Enter your zip code" size="30px">
<br><br>
<input type="number" id="bOdometer" name="beginningOdometerReading" placeholder="Start odometer reading" size="80px">
<br><br>
<input type="number" id="eOdometer" name="endingOdometerReading" placeholder="End odometer reading" width="80px">
<br><br>
<input type="number" id="daysRented" name="endingOdometerReading" placeholder="Days rented" size="50px">
<br><br>
<input type="button" id="total" value="Calculate how many miles you drove and your total cost!" onclick="javascript:multiply();"/>
<br><br>
Miles Driven: <input type="number" id='miles' min="1" max"10000" readonly="" />
Total Cost: <input type="number" id='result' min="1" max"10000" readonly="" />
<br><br>
<input type="button" value="Generate Summary!" onclick="javascript:calculate();"/>
<br><br>
Summary: <textarea cols="30" rows="2" id="textarea"> </textarea>
<br><br>
<input type="reset" value="Reset">
</form>
<hr>
</div>
</body>
这是此问题的工作HTML版本。
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function calculate() {
var customerName = Main.name.value;
var customerAdd = Main.address.value;
var totalCost = document.getElementById('result').value;
var area = document.getElementById("textarea");
area.value='Name: '+customerName+'\nAddress: '+customerAdd+'\nTotal Cost: $'+totalCost+'';}
</script>
<script type="text/javascript">
function multiply() {
var b = document.getElementById('bOdometer').value;
var e = document.getElementById('eOdometer').value;
var result = document.getElementById('miles');
var myResult = (e - b);
result.value= myResult;
var d = document.getElementById('daysRented').value;
var m = document.getElementById('miles').value;
var result2 = document.getElementById('result');
var myResult2 = (d * 15 + m * 0.12);
result2.value= myResult2;
}
</script>
</head>
<body>
<div align="center">
<hr>
<br>
<form name id="Main">
<input type="text" id="name" name="customerName" placeholder="Enter your name here" size="30px">
<br><br>
<input type="text" id="address" name="customerAddress" placeholder="Enter your street address here" size="50px">
<br><br>
<input type="text" id="city" name="customerCity" placeholder="What city do you live in?" size="30px">
<br><br>
<input type="number" id="zip" name="customerZip" placeholder="Enter your zip code" size="30px">
<br><br>
<input type="number" id="bOdometer" name="beginningOdometerReading" placeholder="Start odometer reading" size="80px">
<br><br>
<input type="number" id="eOdometer" name="endingOdometerReading" placeholder="End odometer reading" width="80px">
<br><br>
<input type="number" id="daysRented" name="endingOdometerReading" placeholder="Days rented" size="50px">
<br><br>
<input type="button" id="total" value="Calculate how many miles you drove and your total cost!" onclick="javascript:multiply();"/>
<br><br>
Miles Driven: <input type="number" id='miles' min="1" max"10000" readonly="" />
Total Cost: <input type="number" id='result' min="1" max"10000" readonly="" />
<br><br>
<input type="button" value="Generate Summary!" onclick="javascript:calculate();"/>
<br><br>
Summary: <textarea cols="30" rows="2" id="textarea"> </textarea>
<br><br>
<input type="reset" value="Reset">
</form>
<hr>
</div>
</body>
固定未定义指标，现在只是想要显示结果 – lizardwizard