laravel pagination returns different page - php

Question

I am working on a laravel project, where I get data from an API then I want to display it on pages. I want the return to be spread out across 4 pages, each page with 10 results each. What I have so far, seems like it should work, but I am missing one piece, so any advice and help would be appreciated. So this is how it is suppose to work with code:
1) The users types in a book title in a search box.
<form method=POST action='/search'>
#csrf
<input type="text" name="search_term"/>
<input type="submit" value="Search"/>
</form>
2) there input is then sent to my controller, which queries the google books api.
class search extends Controller {
public function search(){
$current_page = LengthAwarePaginator::resolveCurrentPage();
echo $current_page;
$term = request('search_term');
$term = str_replace(' ', '_', $term);
$client = new \Google_Client();
$service = new \Google_Service_Books($client);
$params = array('maxResults'=>40);
$results = $service->volumes->listVolumes($term,$params);
$book_collection = collect($results);
$current_book_page = $book_collection->slice(($current_page-1)*10,10)->all();
$books_to_show = new LengthAwarePaginator($current_book_page,count($book_collection),10,$current_page);
return view('library.search')->with(compact('books_to_show'));
}
}
3) the results are then displayed on my blade
#extends('home')
#section('content')
#foreach($books_to_show as $entries)
<div class="row">
<div class="col-sm-auto">
<img class="w-50 img-thumbnail" src={{$entries['volumeInfo']['imageLinks']['smallThumbnail']}}/>
</div>
<div class="col-sm">
{{$entries['volumeInfo']['title']}}<br/>
#if($entries['volumeInfo']['authors']!=null)
by:
#foreach($entries['volumeInfo']['authors'] as $authors)
{{$authors}}
#endforeach
#endif
</div>
</div>
#endforeach
{{$books_to_show->links()}}
#endsection
This all works fine and as expected. I get 10 results on the view, and then I have a bar at the bottom which give shows me 4 different pages to choose from.
When I first type in a search term such as "William Shakespeare" My page url is:
localhost:8000/search
But, when I click on any of the pages my url becomes:
http://localhost:8000/?page=2
I understand that the ?page=* is how the pagination determines which page you are viewing, and that should be sent back to the controller. But, I am missing something on sending it back to the controller I think.
Still kind of fresh to this, so any advice is more then greatly appreciated.

Answer 1

LengthAwarePaginator accepts a 5th parameter in its constructor: an array of options.
the path option
$books_to_show = new LengthAwarePaginator($current_book_page, count($book_collection), 10, $current_page, [
// This will fix the path of the pagination links
'path' => LengthAwarePaginator::resolveCurrentPath()
]);
By the way, on a totally different matter, Laravel makes your life easier by slicing the collection for you, check it out:
$current_book_page = $book_collection->forPage($current_page, 10);
Hope it helps :)