Sindbad~EG File Manager

<?php
// Login Functionality
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['login'])) {
    $username = htmlspecialchars($_POST['username']);
    $password = htmlspecialchars($_POST['password']);
    
    // Hardcoded credentials check (Replace this with a secure method)
    if ($username === 'manager' && $password === 'ManageShabi@1998') {
        $_SESSION['username'] = $username;
        header("Location: manage-menu.php");
        exit();
    } else {
        $error_message = "Invalid username or password.";
    }
}

// Logout Functionality
if (isset($_GET['logout'])) {
    session_destroy();
    header("Location: manage-menu.php");
    exit();
} 

// Check if user is logged in
$logged_in = isset($_SESSION['username']);


?>







<!-- Login Modal -->
<div class="modal fade" id="loginModal" tabindex="-1" aria-labelledby="loginModalLabel" aria-hidden="true">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="loginModalLabel">Login</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
            </div>
            <div class="modal-body">
                <?php if (isset($error_message)) { ?>
                    <div class="alert alert-danger"><?= $error_message ?></div>
                <?php } ?>
                <form method="post" action="manage-menu.php">
                    <div class="mb-3">
                        <label for="username" class="form-label">Username</label>
                        <input type="text" id="username" name="username" class="form-control" required>
                    </div>
                    <div class="mb-3">
                        <label for="password" class="form-label">Password</label>
                        <input type="password" id="password" name="password" class="form-control" required>
                    </div>
                    <button type="submit" name="login" class="btn btn-primary">Login</button>
                </form>
            </div>
        </div>
    </div>
</div>