How to make searchbox work with multiple fields

Do you mean one text input field to search in multiple columns? If so you can use like() and orLike() in your query.

PHP Code:

  $this->yourModel
        ->like('title', $searchText)
        ->orLike('description', $searchText)
        ->orLike('comment', $searchText); 


I have an example of that in this article: https://includebeer.com/en/blog/how-to-b...r-4-part-5