Untitled

<?php

if(isset($_POST['calc']))
{
	$calc = $_POST['calc'];
}
else
{
	$calc = "";
}

if(isset($_POST['val1'], $_POST['val2']))
{
	if ($_POST['val1'] == "" || $_POST['val2'] == "")
	{
		header("Location: ./temp.php");
		exit;
	}
	else
	{
		$val1 = $_POST['val1'];
		$val2 = $_POST['val2'];
	}
}

switch ($calc)
{
	case "add":
		$result = $val1 + $val2;
		break;

	case "subtract":
		$result = $val1 - $val2;
		break;

	case "multiply":
		$result = $val1 * $val2;
		break;

	case "divide":
		$result = $val1 / $val2;
		break;
}


if(!isset($result))
{
		echo "<p>Please fillout all the forums.</p>";
}
else
{
	echo "<title>Calculation Result</title>";
	echo "<p>The result of the calculation is: $result</p>";
	echo "<p><a href=\"temp.php\" target=\"_self\">Do Another</a></p>";
}
?>


<html>
<head>
<title>Calculator</title>
</head>
<body>
<form method="post" action="temp.php">
<p>Value 1: <input type="text" name="val1" size="10"></p>
<p>Value 2: <input type="text" name="val2" size="10"></p>
<p>Calculation:<br>
<input type="radio" name="calc" value="add"> add<br>
<input type="radio" name="calc" value="subtract">  subtract<br>
<input type="radio" name="calc" value="multiply"> multiply<br>
<input type="radio" name="calc" value="divide"> divide</p>
<p><input type="submit" name="submit" value="Calculate"></p>
</body>
</html>