search with Codeigniter pagination - codeigniter

Question

Everything with this code is perfect, when I go to second or third ..etc pages
I can browse them normally, my issue with first page when I want to browse first page ,
it gives me this url (http://www.example.com/almanara-shipping/index.php/dashboard/search/)??
it should give me this url (http://www.example.com/almanara-shipping/index.php/dashboard/search?keyword=ali)
public function search($page_start = 0){
$this->load->model('Customers');
$keyword = $this->input->get('keyword');
$data['customers'] = $this->Customers->search($keyword ,2,$page_start);
$this->load->library('pagination');
$config['suffix'] = '?keyword='.$keyword;
$config['base_url'] = site_url()."/dashboard/search/";
$config['total_rows'] = $this->Customers->search_count($keyword);
$config['per_page'] = 2;
$config['full_tag_open'] = "<ul class='pagination'>";
$config['full_tag_close'] ="</ul>";
$config['num_tag_open'] = '<li>';
$config['num_tag_close'] = '</li>';
$config['cur_tag_open'] = "<li class='disabled'><li class='active'><a href='#'>";
$config['cur_tag_close'] = "<span class='sr-only'></span></a></li>";
$config['next_tag_open'] = "<li>";
$config['next_tagl_close'] = "</li>";
$config['prev_tag_open'] = "<li>";
$config['prev_tagl_close'] = "</li>";
$config['first_tag_open'] = "<li>";
$config['first_tagl_close'] = "</li>";
$config['last_tag_open'] = "<li>";
$config['last_tagl_close'] = "</li>";
$this->pagination->initialize($config);
$data['pages'] = $this->pagination->create_links();
$this->load->view('customers',$data);
$this->load->view('templates/footer');
}

Answer 1

I solved the issue by using this code below
$config['first_url'] = $config['base_url'].'?'.http_build_query($_GET);