bbp_remove_user_topic_subscription (intuser_id美元，inttopic_id美元）

函数bbp_remove_user_topic_subscription($user_id， $topic_id) {if(空($user_id) ||空($topic_id)){返回false;} $subscriptions = (array) bbp_get_user_subscribed_topic_ids($user_id);If (empty($subscriptions)){返回false;} $pos = array_search($topic_id， $subscriptions);If (false === $pos){返回false;} array_splice($subscriptions， $pos, 1);$subscriptions = array_filter($subscriptions);If (!empty($subscriptions)) {$subscriptions = implode('，'， wp_parse_id_list($subscriptions));Update_user_option ($user_id， '_bbp_subscriptions'， $subscriptions);} else {delete_user_option($user_id， '_bbp_subscriptions'); } wp_cache_delete( 'bbp_get_topic_subscribers_' . $topic_id, 'bbpress_users' ); do_action( 'bbp_remove_user_topic_subscription', $user_id, $topic_id ); return true; }