Online PHP editor | output for ouQEX

<?php try { $topic = TopicHelper::get($this->id); $topic->isAuthorised('read'); // this guard call `throws an exception` instead of returning `false` $topic->subscribe(1); // this guard call `throws an exception` instead of returning `false` $this->app->enqueueMessage(Text::_('COM_COMPONENT_POST_SUBSCRIBED_TOPIC'), 'success'); // Activity integration $activity = KunenaFactory::getActivityIntegration(); $activity->onAfterSubscribe($topic, 1); } catch (Exception $e) { $this->app->enqueueMessage(Text::_('COM_COMPONENT_POST_NO_SUBSCRIBED_TOPIC') . ' ' . $e->getMessage(), 'error'); }