利用PHP和Html ＋ javascript 编写一个简单的网页计算器程序，可以根据这种有趣的开发构架出更加有趣的网页。
?1. [代码]PHP计算器
<html>
<head>
<title>caculator</title>
</head>
<body>
<form name="myform" method="POST">
<tr>
<script language = "javascript">
</script>
<td><input type="text" name="text1"/></td><br/>
<td><input type="text" name="sign" value="+"/<?$_GET[‘add‘]?></td><br/>
<td><input type="text" name="text2"/></td><br/>
<td><input type="text" name="text3"/></td><br/>
<td><input type="button" name="count" value="="/></td><br/>
<td><input type="text" name="equals"/></td><br/>
<td><input type="reset" name="reset"/></td><br/>
</tr>
<tr>
<script language = "javascript">
function count(text3){
var text1 = parseint(document.form.text1.value);
var text2 = parseint(document.form.text2.value);
}
switch(text3){
case 0:
document.form.text3.value = text1 + text2;
break;
case 1:
document.form.text3.value = text1 - text2;
break;
case 2:
document.form.text3.value = text1 * text2;
break;
case 3:
document.form.text3.value = text1 / text2;
break;
default(text3 = text1/text2!=0){
document.form.text3.value = text1/text2;
}
}
</script>
<td><input type="text" name="text1"/></td><br/>
<td><input type="text" name="sign" value="-"/><?$_GET[‘sub‘]?></td><br/>
<td><input type="text" name="text2"/></td><br/>
<td><input type="text" name="text3"/></td><br/>
<td><input type="button" name="count" value="="/></td><br/>
<td><input type="text" name="equals"/></td><br/>
<td><input type="reset" name="reset"/></td><br/>
</tr>源文件
<tr>http://www.huiyi8.com/psd/?
<script language = "javascript">
</script>
<td><input type="text" name="text1"/></td><br/>
<td><input type="text" name="sign" value="*"/><?$_GET[‘mul‘]?></td><br/>
<td><input type="text" name="text2"/></td><br/>
<td><input type="text" name="text3"/></td><br/>
<td><input type="button" name="count" value="="/></td><br/>
<td><input type="text" name="equals"/></td><br/>
<td><input type="reset" name="reset"/></td><br/>
</tr>
<tr>
<script language = "javascript">
</script>
<td><input type="text" name="text1"/></td><br/>
<td><input type="text" name="sign" value="/"/><?$_GET[‘div‘]?></td><br/>
<td><input type="text" name="text2"/></td><br/>
<td><input type="text" name="text3"/></td><br/>
<td><input type="button" name="count" value="="/></td><br/>
<td><input type="text" name="equals"/></td><br/>
<td><input type="reset" name="reset"/></td><br/>
</tr>
</form>
<?php
class calculate{
pbulic $text1;
public $text2;
public $text3;
function add($text1,$text2){
$text3 = $text1 + $text2;
$this->text1=$text1;
$this->text2=$text2;
echo "$_GET[add]";
}
function sub($text1,$text2){
$text3 = $text1 - $text2;
$this->text1=$text1;
$this->text2=$text2;
echo "$_GET[sub]";
}
function mul($text1,$text2){
$text3 = $text1 * $text2;
$this->text1=$text1;
$this->text2=$text2;
echo "$_GET[mul]";
}
function div($text1,$text2){
$text3 = $text1 / $text2;
$this->text1=$text1;
$this->text2=$text2;
echo "$_GET[div]";
}
function getresult(){
echo $text3 = ($text1 + $text2). ".$_GET[add]";
echo $text3 = ($text1 + $text2). ".$_GET[sub]";
echo $text3 = ($text1 + $text2). ".$_GET[mul]";
echo $text3 = ($text1 + $text2). ".$_GET[div]";
}
}
?>
</body>
</html>
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原文：http://www.cnblogs.com/xkzy/p/3878524.html