<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>图形的周长和面积计算器</title>
</head>
<body>
<?php
//自动加载
requireonce"class_Rect.php";
requireonce"class_Triangle.php";
requireonce"class_Circle.php";
function __autoload($className){
include("class_".ucfirst($className).".php");
}
?>
<center>
<h2>图形的周长和面积计算器</h2>
<hr>
<a href="test.php?action=1">矩形</a>||
<a href="test.php?action=2">三角形</a>||
<a href="test.php?action=3">圆形</a><hr>
</center>
<?php
switch($_REQUEST["action"]) {
case '1':
$form=new Form("矩形",$_REQUEST,"test.php");
echo $form;
break;
case '2':
$form=new Form("三角形",$_REQUEST,"test.php","post","_blank");
echo $form;
break;
case '3':
$form=new Form("圆形",$_REQUEST,"test.php");
echo $form;
break;
default:
echo "请选择一个形状<br>";
}
if (isset($_REQUEST["act"])) {
switch ($_REQUEST["act"]) {
case '1':
$shape=new Rect($_REQUEST);
break;
case '2':
$shape=new Triangle($_REQUEST);
break;
case '3':
$shape=new Circle($_REQUEST);
break;
}
echo "面积为:".$shape->area()."<br>";
echo "周长为:".$shape->perimeter()."<br>";
}
?>
</body>
</html>
------解决思路----------------------
这里的报错是显示$_REQUEST["action"]不存在,没有这个索引
你需要判断是否为空
$action = isset($_REQUEST["action"]) ? $_REQUEST["action"] : '';
switch($action)
{
//。。。。。。。。
}