我的第一个PHP程序

<html>
<head>
   <title>
     <?php
   echo "我的计算器";
   ?>
   </title>
</head>
<script type="text/javascript">
function Onclick()
{
    var num1 = document.getElementById('num1').value;
var num2 = document.getElementById('num2').value;
if(num1=="")
   {
    alert("num1输入不正确");
    }
if(num2=="")
   {
    alert("num2输入不正确");

    }
if(num1==""||num2=="")
{
return false;
    }
   return true;

}
</script>
<body>
<center>我的计算器<br/>
<form action="index.php" method="post">
num1:<input type="text" id="num1" name="num1" value=""><br/>
num2:<input type="text" name="num2" value=""><br/>
计算方式：<select name="run">
               <option value="+">加</option>
      <option value="-">减</option>
      <option value="*">乘</option>
      <option value="/">除</option>
           </select>
<input type="submit" name="submit"value="计算" onClick="return Onclick();"/><br/>
</form>

<?php
$num1 = $_POST['num1'];
$num2 =$_REQUEST['num2'];
$run = $_REQUEST['run'];
   switch($run)
   {
     case '+':print("两数之和为：".($num1+$num2));break;
case '-':print("两数之差为：".($num1-$num2));break;
case '*':print("两数之乘积为：".($num1*$num2));break;
case '/':print("两数之和为：".($num1/$num2));break;
   }
?>
</center>
</body>
</html>
本文出自 “ITeamsky-杨波的技术空间” 博客

补充：Web开发 , php ,