Php 下拉过滤器不工作

我在Stackoverflow上看到了一个过滤器示例，我试图在我的codeigniter上实现它，但当我单击go按钮时，它不会过滤它。它返回我总是

找不到用户

这有什么问题

控制器

public function filter($page=0,$offset=5,$search=''){

        $user = $this->session->userdata('user_id');
        $position = $this->session->userdata('user_position');



        if($position =='admin'){

            $search = $this->input->post('search');
            $row = $this->m_user->getAllFilterUsers($offset,$page,$search);
            $data['usersTable'] = $row->result();
            $data['pagination'] = $this->m_user->getUsersFilterPages($search);
            $data['offset'] = $offset;
            $data['page'] = $page;
            $data['search'] = $search;
            $data['title'] = 'Manage Users';
            $this->load->view('vadminuserfilter',$data);


        }
        else{
            $this->session->set_flashdata('error','Page Not Found.');
            redirect('cuser/displayClientPage');
            return;
        }



    }

模型

看法

筛选依据：

只需检查型号的getAllFilterUsers功能。$offset的值为5，$count的值为0。 但是你用

this->db->where('user_position','client');
$this->db->where('user_status','active');
$this->db->order_by('user_id', 'desc'); 
$UsersQuery = $this->db->get('tb_user',$offset,$count);

那意味着

Select * from tb_user where user_position = 'client' and 'user_status' = 'active' order by user_id desc limit 5,0

此查询始终返回空集 你的问题应该是

Select * from tb_user where user_position = 'client' and 'user_status' = 'active' order by user_id desc limit 0,5

因此，您的代码片段应该是

this->db->where('user_position','client');
$this->db->where('user_status','active');
$this->db->order_by('user_id', 'desc'); 
$UsersQuery = $this->db->get('tb_user',$count,$offset);

最后，函数是

public function getAllFilterUsers($offset,$count,$search){

        if($search!=''){
            $this->db->where('user_position','client');
            $this->db->where('user_status',$search);
        }
                        this->db->where('user_position','client');
                        $this->db->where('user_status','active');
                        $this->db->order_by('user_id', 'desc'); 
          $UsersQuery = $this->db->get('tb_user',$count,$offset);

            if($UsersQuery->num_rows>0){
                return $UsersQuery;
            }

            else{



                $this->session->set_flashdata('message','No User Found');   
                redirect('cuser/filter','refresh');
            }           
    }

---

这就是问题的标题。不，我们不会调试你的代码。请先找出错误的原因。您是否在任何地方进行错误检查？我建议您检查您的方法是否接收到必要的参数。正如@hakra所说，我们不调试代码，我们需要错误来找到解决方案

this->db->where('user_position','client');
$this->db->where('user_status','active');
$this->db->order_by('user_id', 'desc'); 
$UsersQuery = $this->db->get('tb_user',$count,$offset);

public function getAllFilterUsers($offset,$count,$search){

        if($search!=''){
            $this->db->where('user_position','client');
            $this->db->where('user_status',$search);
        }
                        this->db->where('user_position','client');
                        $this->db->where('user_status','active');
                        $this->db->order_by('user_id', 'desc'); 
          $UsersQuery = $this->db->get('tb_user',$count,$offset);

            if($UsersQuery->num_rows>0){
                return $UsersQuery;
            }

            else{



                $this->session->set_flashdata('message','No User Found');   
                redirect('cuser/filter','refresh');
            }           
    }