prepare("SELECT * FROM landing_pages WHERE slug=? AND estado IN ('publicado','borrador') LIMIT 1");
$st->bind_param('s',$slug);
$st->execute();
$landing = $st->get_result()->fetch_assoc();
if(!$landing){ http_response_code(404); echo "Landing no encontrada."; exit; }
$landing_id = (int)$landing['id'];
// validar schedule
if ($landing['estado']!=='publicado' || !lp_schedule_active($conn, $landing_id)) {
http_response_code(404); echo "Landing no publicada."; exit;
}
// variante A/B
$variant = lp_pick_variant($conn, $landing_id); // null = base
// contenido final = variante override o base
$hero = $variant['hero_image'] ?? ($landing['hero_image'] ?? '');
$html = $variant['contenido_html'] ?? ($landing['contenido_html'] ?? '');
$css = ($landing['css_inline'] ?? '') . "\n" . ($variant['css_inline'] ?? '');
$js = ($landing['js_inline'] ?? '') . "\n" . ($variant['js_inline'] ?? '');
// bloques
$bloques = lp_load_blocks($conn, $landing_id);
// tracking impresión
$session_id = session_id() ?: bin2hex(random_bytes(8));
$vid = $variant['id'] ?? null;
$ip = $_SERVER['HTTP_X_FORWARDED_FOR'] ?? $_SERVER['REMOTE_ADDR'] ?? null;
$ua = $_SERVER['HTTP_USER_AGENT'] ?? null;
$ins = $conn->prepare("INSERT INTO landing_variant_stats (landing_id, variant_id, event_type, session_id, ip_address, user_agent)
VALUES (?,?,?,?,?,?)");
$evt='impression';
$ins->bind_param('iissss',$landing_id,$vid,$evt,$session_id,$ip,$ua);
$ins->execute();
?>
<?= htmlspecialchars($landing['meta_title'] ?: $landing['titulo']) ?>
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