= 0 && isset($users[$index])) {
if ($username !== '') {
$users[$index]['username'] = $username;
}
if ($email !== '') {
$users[$index]['email'] = $email;
}
if ($password !== '') {
$users[$index]['passwordHash'] = hashPassword($password);
}
$users[$index]['role'] = $role;
if (saveUsers($users, $previousUsers)) {
$success = 'User updated successfully.';
} else {
$errors[] = 'Unable to update user.';
}
} else {
$errors[] = 'Invalid user selected.';
}
} elseif ($action === 'delete') {
$index = (int) ($_POST['index'] ?? -1);
if ($index >= 0 && isset($users[$index])) {
unset($users[$index]);
$users = array_values($users);
if (saveUsers($users, $previousUsers)) {
$success = 'User deleted successfully.';
} else {
$errors[] = 'Unable to delete user.';
}
} else {
$errors[] = 'Invalid user selected.';
}
}
}
$users = loadUsers();
?>
User Management - KaI