用php實現加減乘除計算器。代碼很簡單哦！
<?php
header("content-type:text/html;charset=utf-8");
session_start();
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-CN" dir="ltr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>簡單計算機</title>
</head>
<body>
<form action="jisuan.php" method="post">
第一個數<input type="text" value="" name="num1"><br />
計算符號<select name="oper">
<option value="+">+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select><br />
第二個數<input type="text" value="" name="num2"><br />
<input type="submit" value="計算結果"><br />
</form>
</body>
</html>
<?php
$num1=$_POST['num1'];
$num2=$_POST['num2'];
$oper=$_POST['oper'];
$rs=0;
switch($oper){
case "+":
$rs=$num1+$num2;
break;
case "-":
$rs=$num1-$num2;
break;
case "*":
$rs=$num1*$num2;
break;
case "/":
$rs=$num1/$num2;
break;
default: echo "您輸入的不正確";
}
$_SESSION['rs']=$rs;
echo '計算結果為：'.$_SESSION['rs'];
?>
URL：http://www.bianceng.cn/webkf/PHP/201410/45953.htm
