frontend\modules\topic\controllers\CommentController::actionCreate PHP Method

    public function actionCreate($id)
    {
        $model = new PostComment();
        if ($model->load(Yii::$app->request->post())) {
            $topService = new TopicService();
            if (!$topService->filterContent($model->comment)) {
                $this->flash('回复内容请勿回复无意义的内容，如你想收藏或赞等功能，请直接操作这篇帖子。', 'warning');
                return $this->redirect(['/topic/default/view', 'id' => $id]);
            }
            $model->user_id = Yii::$app->user->id;
            $model->post_id = $id;
            $model->ip = Yii::$app->getRequest()->getUserIP();
            if ($model->save()) {
                $this->flash("评论成功", 'success');
            } else {
                $this->flash(array_values($model->getFirstErrors())[0], 'warning');
            }
            return $this->redirect(['/topic/default/view', 'id' => $id]);
        }
        return $model;
    }