배열을 데이터베이스에 저장하는 방법은 무엇입니까?

<code>$article=I("post.post");
      $article['eid']=I("post.eid");
      $tags=I("post.tags");
      $tags['tag']=explode(",",I("post.tag"));
      $article['smeta']=json_encode($_POST['smeta']);
      $article['post_content']=htmlspecialchars_decode($article['post_content']);
      $result=$this->posts_model->add($article);
      $result2=$this->tags_model->add($tags);
      echo $this->tags_model->getLastSql();
      dump($tags);
      if ($result && $result2) {
        
        $this->tag_relationships_model->add(array("aid"=>$result,"tagid"=>$result2));

        foreach ($_POST['term'] as $mterm_id){
          $this->term_relationships_model->add(array("term_id"=>intval($mterm_id),"object_id"=>$result));
        }
        $this->success("添加成功！");
      } else {
        $this->error("添加失败！");
      }
       
    }</code>