笨：不顯示登錄錯誤消息

Question

能否請你幫我明白爲什麼我的代碼將不會顯示setmessage：

$this->form_validation->set_message('Sorry %s is not correct.');

的驗證高興地表明它們是必需的：

home.php - >控制器

<?php 

ob_start(); 

if (! defined('BASEPATH')) exit('No direct script access allowed'); 

class Home extends CI_Controller { 

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

function index(){ 
    $this->login(); 
} 

public function login() 
{ 
    //Loads The Page Template 
    $this->template->set('title','Admin Login'); 

    //Validation Check 

    $this->form_validation->set_rules('username','Username','required|trim|max_length[50]|xss_clean'); 
    $this->form_validation->set_rules('password','Password','required|trim|max_length[200]|xss_clean|callback_checkUsernamePassword'); 

    if($this->form_validation->run() == FALSE){ 

     $this->template->load('template','admin/admin_login'); 

    }else{ 
     extract($_POST); // Gets data from form and creates vars 
     $user_id = $this->login_model->check_login($username,$password); 

     if(! $user_id || $password){ // != If username or password are not correct 
      $this->session->set_flashdata('login_error',TRUE); //does not add the non valid login to the session 
      $this->form_validation->set_message('Sorry %s is not correct.'); 
      redirect('admin'); 

     }else{ 
      $this->session->set_userdata('logged_in',TRUE); 
      $this->session->set_userdata('user_id',$user_id); 
      redirect('admin/dashboard'); 
     } 
    } 

} 

function logout(){ 
    $this->session->unset_userdata('logged_in'); 
    echo 'You have now been logged out'; 
    redirect('admin'); 
} 


} 

//End of file home.php 
//Location: ./application/controllers/admin/home.php 

登錄_model.php - >模型

<?php 

class Login_model extends CI_Model 
    { 

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

function Login_model(){ 
    parent::Model(); 
} 

function check_login($username,$password){ 
    $MD5_password = md5($password); // Tells the db that the password is a MD5 # 

    $query_str ="SELECT id FROM users WHERE email = ? and password = ?"; // Tells the db that this is a query 

    $result = $this->db->query($query_str, array($username, $MD5_password)); // Result 

    //If it is all correct 

    if($result->num_rows() == 1){ 

     return $result->row(0)->id; 

    }else{ 
     return false; 
    } 
} 
} 
?> 

我曾嘗試以下：

$lang['error'] = "Sorry your %s is incorrect."; 

- This is set in the lang file 

和

$this->form_validation->set_message('error','Sorry %s is not correct.'); 

• 我不確定什麼第二對必須是

Answer 1

你真的真的真的應該讀user_guide。你的邏輯不正確。例如，你沒有使用你的回調。這就是爲什麼你的錯誤信息不顯示。我已經提出了一些意見供你閱讀。

public function login() 
{ 
    $this->template->set('title','Admin Login'); 

    $this->form_validation->set_rules('username','Username', 'required|trim|max_length[50]|xss_clean'); 
    // You aren't using the callback here. 
    $this->form_validation->set_rules('password','Password', 'required|trim|max_length[200]|xss_clean|callback_checkUsernamePassword'); 

    if($this->form_validation->run() == FALSE){ 

     $this->template->load('template','admin/admin_login'); 

    }else{ 
     // You shouldn't be adding messages when the validation has already passed. The setting should be when the validation is false. 
     extract($_POST); 
     $user_id = $this->login_model->check_login($username,$password); 

     if(! $user_id || $password){ 
      $this->session->set_flashdata('login_error',TRUE); //does not add the non valid login to the session 
      $this->form_validation->set_message('Sorry %s is not correct.'); 
      redirect('admin'); 

     }else{ 
      $this->session->set_userdata('logged_in',TRUE); 
      $this->session->set_userdata('user_id',$user_id); 
      redirect('admin/dashboard'); 
     } 
    } 
} 

這是你應該做的。我不會編寫所有代碼，但會給你一個想法。

public function login() 
{ 
    $this->template->set('title','Admin Login'); 

    $this->form_validation->set_rules('username','Username', 'required|trim|max_length[50]|xss_clean'); 
    $this->form_validation->set_rules('password','Password', 'required|trim|max_length[200]|xss_clean|callback_checkUsernamePassword'); 

    if($this->form_validation->run() == TRUE){ 
     $this->session->set_userdata('logged_in',TRUE); 
     $this->session->set_userdata('user_id',$user_id); 
     redirect('admin/dashboard'); 
    } 

    $this->template->load('template','admin/admin_login'); 
} 

public function checkUsernamePassword() { 
     extract($_POST); // Gets data from form and creates vars 
     $user_id = $this->login_model->check_login($username,$password); 

     if(! $user_id || $password){ // != If username or password are not correct 
      $this->session->set_flashdata('login_error',TRUE); //does not add the non valid login to the session 
      $this->form_validation->set_message('checkUsernamePassword', 'Sorry %s is not correct.'); 
      return FALSE 

     }else{ 
      $this->session->set_userdata('logged_in',TRUE); 
      $this->session->set_userdata('user_id',$user_id); 
      redirect('admin/dashboard'); 
     } 

} 

Answer 2

set_m CodeIgniter的Form Validation類的essage函數有兩個參數 - 第一個是你想修改消息的驗證規則的名稱，第二個是修改後的消息本身。

http://codeigniter.com/user_guide/libraries/form_validation.html

所以，如果你想修改爲必填字段的信息，你可以使用：

$this->form_validation->set_message('required', 'Sorry %s is not correct.'); 

Answer 3

$this->form_validation->set_message(); 

這是用來當你想使自己的驗證函數或設置新的錯誤信息

如果您正在嘗試製作自己的驗證功能，那麼您應該按照以下文章

http://codeigniter.com/user_guide/libraries/form_validation.html

你可以做的是根據返回的值可以設置$這個 - >會話級> set_flashdata（）;並在管理頁面上顯示它。

http://codeigniter.com/user_guide/libraries/sessions.html