PHP Choice between 2 options

StackOverflow https://stackoverflow.com/questions/19998408

  •  30-07-2022
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Question

I am very new to the whole PHP scene since I just started with this at school, Mostly it has gone pretty good, I am learning a lot. I did however encounter some problems.

I need to make a calculater for KWU (electricity). There must be a choice for paying rate. So far I came up with this:

<?php
if (!empty($_POST['submit'])) {
    $KWU = $_POST['KWU'];
    if ('tarief1') {
        $bedrag = 0.50 * $KWU + 200;
    } else {
        $bedrag = 0.75 * $KWU + 100;
    }

    $totaal = $bedrag * 1.19;
    echo "KWU = $KWU </br>";
    echo "Bedrag =  $bedrag </br>";
    echo "Bedrag incl. btw = $totaal";
    echo "<br>";
    echo "<a href=\"energienota.php\">Nog een berekening</a>";
} else {
    ?>
    <html>
        <head>
            <title>winkelprijs</title>
        </head>
        <body>
            <h2>winkelprijs</h2>
            <form method='post' action=''>
                KWU <input name='KWU'></br>
                Tarief:</br>

                <select name="btwtarief">
                    <option value="tarief1" name="tarief1" id="tarief1">Tarief 1</option>
                    <option value="tarief2" name="tarief2" id="tarief1">Tarief 2</option>

                </select>
                <br>
                <input name='submit' type='submit' value='bereken'>
                <input name='reset' type='reset' value='wissen'>

            </form>
        </body>
    </html>

    <?php
}
?>

Now what I don't know is how to get the $tarief1 and $tarief2 choice working. Something with POST I suppose. I hope someone can help me, also sorry for my bad English

Was it helpful?

Solution

Just change this line:

if('tarief1')

to

if ($_POST['btwtarief'] == 'tarief1')

Btw: also you dont need name attribute for your option elements. They have name of select element:

<select name="btwtarief">
  <option value="tarief1">Tarief 1</option>
  <option value="tarief2">Tarief 2</option>
</select>

id attribute you may need, but I dont think so you will...

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