prepare("INSERT INTO messages (user_id, sender, message) VALUES (?, 'user', ?)");
$stmt->execute([$user_id, $msg]);
echo json_encode(['success' => true]);
}
exit;
}
// Fetch greeting message
$stmt = $db->prepare("SELECT value FROM settings WHERE name = 'chat_greeting'");
$stmt->execute();
$greeting = $stmt->fetchColumn();
if (!$greeting) {
$greeting = ($lang == 'zh') ? '您好！欢迎咨询 NovaEx 官方客服，请问有什么可以帮您？' : 'Hello! Welcome to NovaEx official customer service. How can we help you today?';
}
?>