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`m03u02.php`

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<?php
session_start();

if(isset($_POST["name"])) {
    $_SESSION["name"] = $_POST["name"];
}
if(isset($_GET["logout"])) {
    session_destroy();
    header("Location: m03u02.php");
    exit;
}
?>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
</head>
<body class="bg-light">

<?php
if(isset($_SESSION["name"])) {
    echo "<h2 class='text-center mt-4'>Hej "  .$_SESSION["name"]."</h2>";
    echo "<br>";
} else {
    echo "<h2 class='text-center mt-4'>Det finns ingen användare</h2>";
    echo "<br>";
}
?>
<div class="d-flex justify-content-center mt-5">
    <div class="card p-4 shadow" style="width: 400px;">
        <?php
        echo "
                <form method='POST'>
                    <input type='text' name='name' required placeholder='Skriv ditt namn' class='form-control mb-3'>
                    <div class='d-flex gap-2'>
                        <input type='submit' value='Skicka' class='btn btn-primary w-100'>

                        <a href='m03u02.php' class='btn btn-success w-50'>
                            Ladda om
                        </a>
                    </div>
                </form>
            ";
        if(isset($_SESSION["name"])) {
            echo "<br>";
            echo '<a href="m03u02.php?logout=1" class="btn btn-danger w-100">Logga ut</a>';
        }
        ?>
    </div>
</div>
    
</body>
</html>