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webbsrvprg1/exercises/ovning7/uppgift4/

index.php

index.php

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<?php
    session_start();

    if (!isset($_SESSION["tal"])) {
        $_SESSION["tal"] = [];
    }

    if (isset($_POST["tal"]) && $_POST["tal"] !== "") {

        $tal = $_POST["tal"];

        $_SESSION["tal"][] = $tal;
    }

    if (count($_SESSION["tal"]) > 0) {
        $medel = array_sum($_SESSION["tal"]) / count($_SESSION["tal"]);
    }
?>

<html>
<body>

    <h1>Mata in tal</h1>

    <form method="post">
        <input type="number" step="any" name="tal" required>
        <button type="submit">Lägg till tal</button>
    </form>

    <h2>Alla inmatade tal:</h2>

    <?php
    foreach ($_SESSION["tal"] as $tal) {
        echo $tal . "<br>";
    }
    ?>

    <h2>Medelvärde:</h2>

    <?php
    if (count($_SESSION["tal"]) > 0) {
        echo $medel;
    } else {
        echo "Inga tal har matats in ännu.";
    }
    ?>

</body>
</html>