Laravel eloquent search helper class with pagination

Search.php

<?php

// composer json
// "php": "^7.3|^8.0",
// "laravel/framework": "^8.75"

class Search 
{
    public $model;

    public $default_search_columns = [
        'name',
        'email',
        // ..and so on (fillable fields in your eloquent model)
    ];

    public function __construct($model)
    {
        $this->model = $model;
    }

    public function results(string $searchterm, int $page = null, int $resultsNum = null)
    {
        $model = new $this->model;
        $columns = $model->getFillable();
        $searchColumns = [];

        foreach($columns as $model_column){
            if(in_array($model_column, $this->default_search_columns)) array_push($searchColumns, $model_column);
        }

        // if paginated results
        if($page && $resultsNum){

            $allItems = $this->model::orderBy('id', 'desc')
                ->skip($page * $resultsNum - $resultsNum)
                ->take($resultsNum)
                ->where(function($query) use($searchColumns, $searchterm){
                    foreach($searchColumns as $searchColumn) {
                        $query->orWhere($searchColumn, "like", '%' . $searchterm . '%');
                    }
                    return $query;
                })
                ->select("*")
                ->get();

            $allItemstotal = $this->model::orderBy('id', 'desc')
                ->where(function($query) use($searchColumns, $searchterm){
                    foreach($searchColumns as $searchColumn) {
                        $query->orWhere($searchColumn, "like", '%' . $searchterm . '%');
                    }
                    return $query;
                })
                ->select("*")
                ->get();

            $numberOfPages = ceil($allItemstotal->count() / $resultsNum);

            $pages = array();
            for($i = 1; $i <= $numberOfPages; $i++){
                array_push($pages, $i);
            }

            $results = $allItems->toArray();

            $response["numberOfPages"] = $pages;
            $response["results"] = $results;

            return $response;

        } else {
            $results = $this->model::where(function($query) use($searchColumns, $searchterm){
                foreach($searchColumns as $searchColumn) {
                    $query->orWhere($searchColumn, "like", '%' . $searchterm . '%');
                }
                return $query;
            });

            $searchResults = $results->get();

            return $searchResults;
        }

        
    }
    
}


// usage in controller
// $request parameters (GET Method) (*Illuminate\Http\Request instance):
// {your url}?page=1&results=100&term=foo
public function search(Request $request)
{
    if(isset($request->page) && isset($request->results)){
        if(isset($request->term)){
            $search = new Search(User::class);
            return $search->results($request->term, $request->page, $request->results);
        } else {
            $pagination = new Pagination(User::class);
            return $pagination->paginate($request->page, $request->results);
        }
    }

    if(isset($request->term)){
        $search = new Search(User::class);
        return $search->results($request->term);
    }
    return response(User::all());
}