多次删除，带有ci中的复选框

I know it has already been asked, but I'm not able to solve this. Below is my control module

public function ahome()
{
    $this->load->model('model');
    $data['user'] = $this->model->selall('user');
    $this->load->view('ahome', $data);
    if ($this->input->post('del'))
    {
        $did = $this->input->post('chk');

        // print_r($did);

        for ($i = 0; $i < count($did); $i++)
        {
            $multi = $did[$i];
            print_r($multi);
            $this->model->delall("user", $multi);

            // redirect("control/ahome");

        }
    }
}

and this is my model module

 public function delall($tb,$wh)
 {
     $this->db->query("delete from $tb where uid in('$wh')");
 }    

now problem is that it's only delete single row not multiple rows

In your query string, try removing the quotes around the $wh variable.

public function delall($tb,$wh)
{
  $this->db->query("delete from $tb where uid in ($wh)");
}

That should get it to work; however, you should be using CodeIgniter's query bindings. Something like this:

public function delall($tb,$wh)
{
  $this->db->query("delete from $tb where uid in (?)", array($wh));
}

Refer to this answer for more details.

Try this, controller,

public function ahome()
{
    $this->load->model('model');
    $data['user'] = $this->model->selall('user');
    $this->load->view('ahome', $data);
    if ($this->input->post('del'))
    {
        $did = $this->input->post('chk');

        // print_r($did);

        foreach ($did as $d_id)
        {
            $this->model->delall("user", $d_id);

            // redirect("control/ahome");

        }
    }
}

Model:

public function delall($tb,$wh)
 {
     $this->db->where('id',$wh);
     $this->db->delete($tb);
     return true;
 }