A Lightweight LMS Architecture for Mobile Learning Using PHP And WhatsApp APIs . Journal of Computer Science and Technological Enquiry, [S. l.], v. 2, n. 1, p. 13–17, 2026. DOI: 10.65496/jcste.2026.65. Disponível em: https://journals.noesispub.com/index.php/jcste/article/view/65. Acesso em: 26 sep. 2026.