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login.php

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<?php
require "database.php";
session_start();

if (isset($_SESSION['player_id'])) {
    header("Location: dashboard.php");
    exit;
}

$error = "";

if ($_SERVER["REQUEST_METHOD"] === "POST") {
    $stmt = $conn->prepare("SELECT * FROM Players WHERE Username = ?");
    $stmt->execute([$_POST["username"]]);
    $user = $stmt->fetch(PDO::FETCH_ASSOC);

    if ($user && password_verify($_POST["password"], $user["PasswordHash"])) {
        $_SESSION["player_id"] = $user["PlayerID"];
        $_SESSION["username"] = $user["Username"];

        header("Location: dashboard.php");
        exit;
    } else {
        $error = "Invalid login";
    }
}
?>

<!DOCTYPE html>
<html>
<head>
    <title>Login</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>

<div class="container mt-5">
    <h2>Login</h2>

    <?php if ($error): ?>
        <div class="alert alert-danger"><?= $error ?></div>
    <?php endif; ?>

    <form method="POST">
        <input class="form-control mb-2" name="username" placeholder="Username" required>
        <input class="form-control mb-2" type="password" name="password" placeholder="Password" required>

        <button class="btn btn-primary">Login</button>
        <a href="index.php" class="btn btn-secondary">Back</a>
    </form>
</div>

</body>
</html>