Yii2는 동시에 여러 필드를 검색하는 방법을 실현합니다.

public function actionIndex()
{
  $key =Yii::$app->request->post("key");
  $query = Post::find()->joinWith('cate');
  $post = $query->orderBy(['post.id' => SORT_DESC])->asArray()->where(['post.status' => 1]);
  if($key){
    $post->andFilterWhere(['like', 'post.title', $key])
      ->orFilterWhere(['like', 'post.content', $key]);
  }
  $pages = new Pagination([
    'totalCount' => $post->count(),
    'defaultPageSize' => 10
  ]);
  $model = $post->offset($pages->offset)->limit($pages->limit)->all();
  return $this->render('index', [
    'model' => $model,
    'pages' => $pages,
  ]);
}

select count(*) from `post` left join `category` on `post`.`cate_id`=`category`.`id` where ((`post`.`status`=1) and (`post`.`title` like '%key%')) or (`post`.`content` like '%key%') order by `post`.`id` desc
select `post`.* from `post` left join `category` on `post`.`cate_id`=`category`.`id` where ((`post`.`status`=1) and (`post`.`title` like '%key%')) or (`post`.`content` like '%key%') order by `post`.`id` desc limit 10