Untitled

<html>
<head>
    <style>
        body {
            font-family: Arial;
        }
        table tr td {
            border-collapse: collapse;
        }
    </style>
    <?php
    $test = "Vul het formulier in!";
        $pee = "";
        $seee = "";
        $ptt = "";
        $sttt = "";
        $pdd = "";
        $sddd = "";
    if($_GET)
    {

        $aee = $_GET["ae"];
        $att = $_GET["at"];
        $add = $_GET["ad"];

        $see = $_GET["se"];
        $seee = $aee * $see;

        $stt = $_GET["st"];
        $sttt = $att * $stt;

        $sdd = $_GET["sd"];
        $sddd = $add * $sdd;

        $pee = $_GET["pe"];
        $ptt = $_GET["pt"];
        $pdd = $_GET["pd"];

    }
    ?>
</head>
<form action="#" method="GET">
    <body>
        <table border="1" rowspan="4">
            <tr>
                <td></td>
                <td><b><i>Producten</i></b></td>
                <td><b>Aantal</b></td>
                <td><b>Stukprijs in euro's</b></td>
            </tr>
            <tr>
                <td><i>1</i></td>
                <td><input type="text" name="pe"></td>
                <td><input type="text" name="ae" value="0"></td>
                <td><input type="text" name="se" value="0"></td>
            </tr>
            <tr>
                <td><i>2</i></td>
                <td><input type="text" name="pt"></td>
                <td><input type="text" name="at" value="0"></td>
                <td><input type="text" name="st" value="0"></td>
            </tr>
            <tr>
                <td><i>3</i></td>
                <td><input type="text" name="pd"></td>
                <td><input type="text" name="ad" value="0"></td>
                <td><input type="text" name="sd" value="0"></td>
            </tr>
            <tr>
                <td colspan="2"><input type="submit" name="berekenen" value="Versturen"></td>
                <td colspan="2">
                </td>
            </tr>
        </table>
    <?php
        echo "Product 1 zijn/is $pee , de totaalprijs is $seee";
        echo "<br>";
        echo "Product 2 zijn/is $ptt , de totaalprijs is $sttt";
        echo "<br>";
        echo "Product 3 zijn/is $pdd , de totaalprijs is $sddd";
        echo "<br>";
        if (empty($pee)) {
        echo "Veld 1 is niet ingevuld";
        }
        echo "<br>";
        if (empty($ptt)) {
        echo "Veld 2 is niet ingevuld";
        }
        echo "<br>";
        if (empty($pdd)) {
        echo "Veld 3 is niet ingevuld";
        }
    ?>
    </body>
<form>
</html>