$route['writing-qb/(:any)/(:any)/(:any)'] 不起作用

Question

当我使用 uri 段 2、3 时，它可以工作，但是当添加 uri 段 4 时，它不起作用。

网址应该是这样的... http://localhost/maruf/writing-qb/bcs/44th-bcs-english/how-has-the-phrase-digital-detox-been-explained-in-the-passage?

但是显示是这样的... http://localhost/maruf/writing-qb/bcs/how-has-the-phrase-digital-detox-been-explained-in-the-passage？ 并且两个 URL 都显示 404。

这是我的路线

$route['written-qb/(:num)'] = 'written-qb';  //works
$route['written-qb/(:any)/(:any)'] = 'written-qb/written_qb_details/$1/$2';  //works
$route['written-qb/(:any)/(:any)/(:any)'] = 'written-qb/written_qb_answer/$1/$2/$3';  //does not work

我的控制器是...

    public function index(){
        
        $data['qb_list'] = $this->Question_bank_model->get_qb_with_category(FALSE);
        //footer data
        $data['main_content'] = 'written_qb';
        $this->load->view('include/template',$data);
    } // works fine
    
    public function written_qb_details($category, $slug = NULL){
        
        $config['uri_segment'] = 2;
        $slug = $this->uri->segment(3);
        //data
        $data['qb_list'] = $this->Question_bank_model->get_qb_with_category(FALSE);
        $data['qb_info'] = $this->Question_bank_model->get_qb_details($slug, $config['uri_segment']);
        if(empty($data['qb_info'])){
            show_404();
        }
        $data['url_slug']       = $data['qb_info']['qb_exam_slug'];
        $data['meta_title']         = $data['qb_info']['qb_exam'];
        $data['meta_description']   = $data['qb_info']['qb_exam_post_meta'];
        $data['meta_keywords']      = $data['qb_info']['qb_exam_post_tags'];
        //view
        $data['main_content'] = 'written_qb_details';
        $this->load->view('include/template',$data);
    } // works fine
    
    public function written_qb_answer($slug = NULL, $slug2 = NULL){
        
        $config['uri_segment'] = 2;
        $slug = $this->uri->segment(3);
        $slug2 = $this->uri->segment(4);
        //data
        $data['qb_info'] = $this->Question_bank_model->get_qb_answer_details($slug, $slug2, $config['uri_segment']);
        if(empty($data['qb_info'])){
            show_404();
        }
        $data['url_slug']       = $data['qb_info']['qb_exam_question_slug'];
        $data['meta_title']         = $data['qb_info']['qb_exam_question'];
        $data['meta_description']   = $data['qb_info']['qb_exam_answer_meta'];
        $data['meta_keywords']      = $data['qb_info']['qb_exam_answer_tags'];
        //view
        $data['main_content'] = 'answer';
        $this->load->view('include/template',$data);
    } // it does not work

我的模型是...

        public function get_qb_details($slug = FALSE){
            
            if($slug === FALSE){
                $this->db->order_by('qb_post.qb_exam_slug', 'DESC');
                $this->db->join('qb_category', 'qb_category.qb_category_name_slug = qb_post.qb_category_name_slug');
                $this->db->where('qb_exam_active',1);
                $query = $this->db->get('qb_post');
                return $query->result_array();
            }
        
            $query = $this->db->get_where('qb_post', array('qb_exam_slug' => $slug));
            return $query->row_array();
        }
        public function get_qb_answer_details($slug2 = FALSE){
            
            if($slug2 === FALSE){
                $this->db->where('qb_exam_answer_active',1);
                $query = $this->db->get('qb_exam_ans');
                return $query->result_array();
            }
        
            $query = $this->db->get_where('qb_exam_ans', array('qb_exam_question_slug' => $slug2));
            return $query->row_array();
        }

在控制器“writing_qb_answer”和路由中 $route['书面qb/(:any)/(:any)/(:any)'] = '书面qb/writing_qb_answer/$1/$2/$3'; 不起作用。显示404。