function convertTemp($temp, $type) {
    if ($type == "CtoF") {
        $result = ($temp * 9/5) + 32;
    } elseif ($type == "FtoC") {
        $result = ($temp - 32) * 5/9;
    } else {
        $result = "Invalid conversion type!";
    }
    return round($result, 2);
}

$temp = $_REQUEST['temp'];
$type = $_REQUEST['type'];

$newTemp = convertTemp($temp, $type);

print "<h2>Converted Temperature: $newTemp</h2>";