php CodeIgniter 错误 - 在 null 上调用成员函数
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/41988086/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
CodeIgniter error - Call to a member function on null
提问by Vandan Kumbhat
I have my form which loads login method of Auth controller class on submit and I have AuthData model which has an authenticate function. Now when user submits form I get error?
我有我的表单，它在提交时加载 Auth 控制器类的登录方法，我有一个具有身份验证功能的 AuthData 模型。现在当用户提交表单时出现错误？
Warning is-
警告是——
A PHP Error was encountered
Severity: Notice
Message: Undefined property: Auth::$AuthData
Filename: controllers/Auth.php Line Number: 21Backtrace:
File: C:\xampp\htdocs\trials\application\controllers\Auth.php Line: 21 Function: _error_handler
File: C:\xampp\htdocs\trials\index.php Line: 315 Function: require_onceError An uncaught Exception was encountered
Type: Error
Message: Call to a member function authenticate() on null
Filename: C:\xampp\htdocs\trials\application\controllers\Auth.php Line Number: 21Backtrace:
File: C:\xampp\htdocs\trials\index.php Line: 315 Function: require_once
遇到 PHP 错误
严重性：通知
消息：未定义的属性：Auth::$AuthData
文件名：controllers/Auth.php 行号：21回溯：
文件：C:\xampp\htdocs\trials\application\controllers\Auth.php 行：21 函数：_error_handler
文件：C:\xampp\htdocs\trials\index.php 行：315 函数：require_once错误遇到未捕获的异常
类型：错误
消息：调用成员函数authenticate() on null
文件名：C:\xampp\htdocs\trials\application\controllers\Auth.php 行号：21回溯：
文件：C:\xampp\htdocs\trials\index.php 行：315 功能：require_once
Here is my controller
这是我的控制器
<?php
//defined('BASEPATH') OR exit('No direct script access allowed');
class Auth extends CI_Controller {
public function index()
{
$this->load->view('welcome_message');
$this->load->model('AuthData');
$this->load->helper('url');
// needed ???
$this->load->database();
}
public function login()
{
$user = $this->input->post('username');
$pass = $this->input->post('password');
$input = array( 'username'=>$user, 'password'=>$pass);
$data['loggedIn'] = "no";
$chk = $this->AuthData->authenticate($input);
if($chk)
redirect('Sample/success');
else
redirect('Sample/failed');
//$this->load->view('home/contact');
}
}
My model
我的模型
<?php
//session_start();
class AuthData extends CI_Model {
public function __construct()
{
$this->load->database();
}
public function authenticate($input=NULL)
{
$query = $this->db->query('SELECT * FROM user');
$rows = $query->result_array();
foreach($rows as $check)
{
if($input['password']==$check['password'])
{
if($input['username']==$check['usernmae'])
{
//session_start();
$_SESSION['login'] = "T";
$_SESSION['username'] = $input['username'];
//is it unsafe to keep password?
$_SESSION['password'] = $input['password'];
return true;
//maybe break here is redundant,but dont want risk
break;
}
}
}
return false;
}
}
?>
And form_open in view
和 form_open 视图
<?php echo form_open('auth/login', ['class' => 'form-signin', 'role' => 'form']); ?>
Also if it matters, I have removed index.php.
另外，如果重要的话，我已经删除了 index.php。
回答by Antony
As @aynber correctly states the AuthData model isn't available globally in this function.
正如@aynber 正确指出的那样，此函数中的 AuthData 模型不是全局可用的。
Your 2 options are to either: 1 - autoload it in the config/autoload.php script as @wolfgang1983 states or 2: setup a constructor
您的 2 个选项是：1 - 在 config/autoload.php 脚本中自动加载它，如@wolfgang1983 所述或 2：设置一个构造函数
public function __construct(){
$this->load->model('Authdata');
}
It will then be available throughout your controller.
然后它将在您的整个控制器中可用。
