代码点火器分页链接转到 404 页面未找到

>我在我的 CI 项目中实现了这个带有搜索结果的分页，但是我无法让我的分页链接转到下一页，例如：

我的搜索页面第一次加载时是http://localhost/ci_project/search，当我点击将转到http://localhost/ci_project/search/2的分页链接时，该页面显示为404 Page Not Found。

有人可以帮我找出代码中的问题吗？我尝试了很多关于解决方案的建议，但无能为力，大部分问题来自$config['base_url'] = base_url('search');，但没有一个是帮助。

型：

public function do_search_count($keywords)
{
    $sql = "SELECT COUNT(*) AS cnt FROM products WHERE MATCH (name, manufacturer) AGAINST ('".$keywords."')";
    $q = $this->db->query($sql);
    $row = $q->row();
    return $row->cnt;
}
public function do_search($keywords, $per_page, $limit)
{
    $this->db->escape($keywords);
    $this->db->where('MATCH (name, manufacturer) AGAINST ("'.$keywords.'") LIMIT '.$per_page.', '.$limit, NULL, FALSE);
    $query = $this->db->get('products');
    if($query->num_rows() > 0){
        return $query->result();
    }else{
        return false;
    }
}

控制器：

function search()
{
    $keywords = $this->input->post('search');
    $searchterm = $this->db_model->searchterm_handler($this->input->get_post('search', TRUE));
    $limit = ($this->uri->segment(2) > 0)?$this->uri->segment(2):0;
    $config['base_url'] = base_url('search');
    $config['total_rows'] = $this->db_model->do_search_count($searchterm);
    $config['per_page'] = 5;
    $config['uri_segment'] = 2;
    $config['use_page_numbers'] = TRUE;
    $choice = $config['total_rows'] / $config['per_page'];
    $config['num_links'] = round($choice);  
    $this->pagination->initialize($config);
    $data['results'] = $this->db_model->do_search(trim($keywords), $limit, $config['per_page']);
    $data['pagination'] = $this->pagination->create_links();
    $data['searchterm'] = $searchterm;
    $data['total'] = count($data['results']);
    $data['title'] = 'Search';
    $this->load->view('header', $data);
    $this->load->view('search', $data);
    $this->load->view('footer', $data);
}

谢谢。