connect_errno) { die("Database connection failed: " . $conn->connect_error); } // Force UTF-8 $conn->set_charset("utf8mb4"); /* -------------------------------------------- GLOBAL USER VARIABLES (if logged in) --------------------------------------------- */ $USER_ID = $_SESSION['uid'] ?? 0; $USERNAME = $_SESSION['username'] ?? ""; $ROLE = $_SESSION['role'] ?? "guest"; /* -------------------------------------------- HELPER: Redirect if not logged in --------------------------------------------- */ function require_login() { if (!isset($_SESSION['uid'])) { header("Location: login.php"); exit(); } } /* -------------------------------------------- HELPER: Require role (admin/staff/user) --------------------------------------------- */ function allow_role($roles = []) { global $ROLE; if (!in_array($ROLE, $roles)) { echo ""; exit(); } } ?>