session->has('last_activity'); } public function getLastActivity(): ?int { $value = $this->session->get('last_activity'); return $value !== null ? (int) $value : null; } public function setLastActivity(int $timestamp): void { $this->session->put('last_activity', $timestamp); } public function clearLastActivity(): void { $this->session->forget('last_activity'); } public function invalidate(): void { $this->session->invalidate(); $this->session->regenerateToken(); } }