!空函数在使用codeigniter登录时不起作用

这是我的登录表

<form action="<?php echo site_url('admin/checkAdmin')?>
<div class="form-group">
  <input type="text" name="email" placeholder="Enter Your Email" class="form-control">
</div>
<div class="form-group">
  <input type="password" name="password" placeholder="Enter Your Password" class="form-control">
</div>
<div class="form-group">
  <button class="btn btn-primary" type="submit">Signin</button>
</div>
</form>

---

无论我是否输入值，它仍然会回显“不工作”。问题出在哪里？

控制器代码：-

class admin extends CI_Controller {

 function login()
    {
        $email= $this->input->post("email");
   $password = $this->input->post("password");  

 $result = $this->db->get_where('table_name',array('email'=>$email,'password'=>$password))->row_array();
            if ($result >0) //active user record is present
            {

                 
                $url = base_url('admin/Admin/dashboard');
                redirect($url);    
            }
            else{
                 redirect('admin/Admin');

            }
        }
        
}

class admin extends CI_Controller {

 function login()
    {
        $email= $this->input->post("email");
   $password = $this->input->post("password");  

 $result = $this->db->get_where('table_name',array('email'=>$email,'password'=>$password))->row_array();
            if ($result >0) //active user record is present
            {

                 
                $url = base_url('admin/Admin/dashboard');
                redirect($url);    
            }
            else{
                 redirect('admin/Admin');

            }
        }
        
}