问如何检查重复标题而不保存到数据库中

EN

public function getTitle($title){
    $title = $this->posts->where('title', $title)->get();
    return $title;
}
public function getApi(Request $request){
    $url = "https://newsapi.org/v2/top-headlines?sources=techcrunch&apiKey=87384f1c2fe94e11a76b2f6ff11b337f";

    $data = Http::get($url);

    $item = json_decode($data->body());

    $i = collect($item->articles);

    $limit = $i->take(20);   // take limited 5 items

    $decode = json_decode($limit);


    foreach($decode as $post){
        $ite = (array)$post;
        $hi = $this->getTitle($ite['title']);
        dd($ite['title'], $hi);
        if($ite['title']==$hi){
            dd('not save');
        }
        else{
            dd('save');
        }
        //dd($hi, $ite['title']);
        // create post 
        $dataPost = [
            'title'=>$ite['title'],
            'description'=>$ite['description'],
            'content'=>$ite['content'],
            'topic_id'=>'1',
            'post_type'=>$request->type,
            'user_id'=>'1',
            'enable'=>'1',
            'feature_image_path'=>$ite['urlToImage']
        ];
        //dd($dataPost);
        //$this->posts->create($dataPost);
    }
    return redirect()->route('posts.index');
}