计算器和ajax部分：
<?php
/**
* Created by PhpStorm.
* User: Administrator
* Date: 16-9-2
* Time: 上午9:20
*
* 计算器_GET
*
*/
?>
<script type="text/javascript">
function loadXMLDoc(){
var xmlhttp;
if(window.XMLHttpRequest)
xmlhttp=new XMLHttpRequest(); //IE7+ FF GG
else
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");//IE5 6
xmlhttp.onreadystatechange=function(){
if(xmlhttp.readyState==4 && xmlhttp.status==200){
//alert(xmlhttp.responseText);
document.getElementById("result").value=xmlhttp.responseText;
}
}
data1=document.getElementById("val1").value;
dtype=document.getElementById("vtp").value;
data2=document.getElementById("val2").value;
xmlhttp.open("GET","test.php?data1="+data1+"&dtype="+dtype+"&data2="+data2, true);
xmlhttp.send();
}
</script>
<p>
<input type="text" name="val1" id="val1">
<select name="vtp" id="vtp">
<option value="add">+</option>
<option value="sub">-</option>
<option value="mul">*</option>
<option value="del">/</option>
</select>
<input type="text" name="val2" id="val2">
<button id="calcBtn" onclick="loadXMLDoc()">=</button>
<input type="text" name="result" id="result">
</p>
运算部分：
<?php $data1=floatval($_GET[‘data1‘]); $dtype=$_GET[‘dtype‘]; $data2=floatval($_GET[‘data2‘]); if($dtype!="add" && $dtype!="sub" && $dtype!="mul" && $dtype!="del") die("error"); if(empty($data1) || empty($data2)) die("error"); if($dtype=="del" && $data2==0) die("0"); $rwt=0; switch($dtype){ case "add": $rwt=$data1 + $data2; break; case "sub": $rwt=$data1 - $data2; break; case "mul": $rwt=$data1 * $data2; break; case "del": $rwt=$data1 / $data2; break; default: $rwt=0; } echo $rwt;
实现效果：
原文：http://www.cnblogs.com/jianqingwang/p/5840693.html