PHP自学1——简单表单提交
最近自学PHP，顺便做个笔记记录一下自己的学习进度。选用的教程是《PHP and MySQL Web Development 4th Edition》，建议阅读英文教材（我能说英文网上免费的中文资源不清晰么，为避免版权纠纷，链接请自寻）。
本节代码实现了从一个html页面将用户填写信息提交到服务器，服务器根据提交信息显示一些统计数据（通过php脚本）。
orderForm.html文件：
<html>
<head>
<title>Wayne's Online DrinkShop</title>
</head>
<body>
<!--Cereate a Submit Form-->
<form action="processOrder.php" method="POST">
<table border="0" cellpadding= "3" >
<tr>
<th align="center" colspan="2" bgcolor="#CCCCCC">Drink List</th>
</tr>
<tr>
<td align="center" bgcolor="#CCCCCC" width="200" align="center">Drink Name</td>
<td align="center" bgcolor="#CCCCCC" width="100" align="center">Quantity</td>
</tr>
<tr>
<td align="center">Milk</td>
<td align="center"><input type="text" name="milkQty" size="3"/></td>
</tr>
<tr>
<td align="center">Coke</td>
<td align="center"><input type="text" name="cokeQty" size="3"/></td>
</tr>
<tr>
<td align="center">Tea</td>
<td align="center"><input type="text" name="teaQty" size="3"/></td>
</tr>
<tr>
<td align="center">Coffee</td>
<td align="center"><input type="text" name="coffeeQty" size="3"/></td>
</tr>
<tr>
<td align="center">Juice</td>
<td align="center"><input type="text" name="juiceQty" size="3"/></td>
</tr>
<tr>
<td align="center">What's your gender?</td>
<td align="center">
<select name="gender">
<option value="male">Male</option>
<option value="female">Female</option>
</select>
</td>
</tr>
<tr>
<td align="center" colspan="2"><input type="submit" value="Submit Order" /></td>
</tr>
</table>
</form>
</body>
</html>
processOrder.php文件（该文件中还包含html标签）：
<html>
<head>
<title>Wayne's DrinkShop-Order Result</title>
</head>
<body>
<?php
//Get the value from POST method from html page
$milkQty = $_POST['milkQty'];
$cokeQty = $_POST['cokeQty'];
$teaQty = $_POST['teaQty'];
$coffeeQty = $_POST['coffeeQty'];
$juiceQty = $_POST['juiceQty'];
$sex = $_POST['gender'];
#set the variable's value to 0 when it is null
$milkQty = $milkQty ? $milkQty : 0;
$cokeQty = $cokeQty ? $cokeQty : 0;
$teaQty = $teaQty ? $teaQty : 0;
$coffeeQty = $coffeeQty ? $coffeeQty : 0;
$juiceQty = $juiceQty ? $juiceQty : 0;
#define constant value
define("MILKPRICE" , 3.50);
define("COKEPRICE" , 2.50);
define("TEAPRICE" , 4.00);
define("COFFEEPRICE" , 10.00);
define("JUICEPRICE" , 8.00);
?>
<h1>Wayne's DrinkShop</h1>
<h2>Order Result</h2> <?php
//Calculate the value
$totalQty = $milkQty + $cokeQty + $teaQty +
$coffeeQty + $juiceQty;
$totalPrice = $milkQty * MILKPRICE + $cokeQty * COKEPRICE
+ $teaQty * TEAPRICE + $coffeeQty * COFFEEPRICE
+ $juiceQty * JUICEPRICE;
//Print the result
echo "<p>Order processed at ". date("G:i Y dS");
echo "<p>Your Order is as follows</p>";
echo $milkQty. " Milk<br />";
echo $cokeQty. " Coke<br />";
echo $teaQty. " Tea<br />";
echo $coffeeQty. " Coffee<br />";
echo $juiceQty. " Juice<br />";
echo "Item order: ". $totalQty. "<br />";
echo "Total price: $". $totalPrice. "<br />";
echo "It's a ". $sex. " customer."
?>
</body>
</html>
html页面显示及提交响应结果：
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" 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" alt="" />
2016/2/29修订 By野马菌
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