Codeigniter 调用未定义的方法 CI_DB_mysqli_result::num_row()

Question

我将此代码用于 login_model：

类 Login_model 扩展了 CI_Model{

function __construct(){
    parent:: __construct();
}

function check(){
    $username = $this->input->post('username',true);
    $password = $this->input->post('password',true);
    $remember = $this->input->post('remember',true);


    /*
    $this->db->select('username','username');
    $this->db->select('password','password');
    $this->db->where('username',"$username");
    $this->db->where('password',md5($password));
    $this->db->from('user');
    $this->db->limit(1);
    $is = $this->db->count_all_results();
    */
    $user = $this->db->get_where ('user',array('username'=>$username,'password'=>md5($password)));
    $is = $user->num_row();

    if($is>0){

        $id = $user->row(0)->id;
        $data_session=array(
            'username'=>'$username',
            'login'=> true,
            'id'=>$id
        );
        $this->session->set_userdata($data_session);

        if($remember == 1){
           $login_text= $username.'_isLogin_'. $id;
            $this->load->library('encrypt');
            $cookie_value = $this->encrypt->encode($login_text,ENCRYPT_KEY);

           $data_cookie=array(
               'name'=>'Ahmadreza',
               'value'=>$cookie_value,
               'expire'=>time()+60*60*24*365
           );
            $this->input->set_cookie($data_cookie);
        }
        redirect('post/index');
    }else{
        redirect('login/index');
    }


}

}

但是显示这个！ 错误 现在我该如何解决这个问题。

谢谢你。

错误图片：http : //i.stack.imgur.com/MPQLX.png

Answer 1

它是num_rows()和不是num_row()

代替，

$is = $user->num_row();

和

$is = $user->num_rows();