codeigniter返回“Message：Undefined property：Welcome :: $ load”试图加载助手lib [英] codeigniter returns "Message: Undefined property: Welcome::$load" trying to load helper lib
问题描述
背景信息
我刚刚安装了CI的新副本，并修改了欢迎控制器以包含url助手，方法 base_url 。然后尝试从 home.php
问题： $ b调用此方法$ b我得到以下错误消息：
消息：未定义属性：Welcome :: $ load
文件名：controllers / welcome.php
代码：
$ b这是我欢迎控制器现在的样子：
class Welcome extends CI_Controller {
public function __construct（）
{
$ this-> load-> helper（'url'）;
}
public function index（）
{
$ this-> load-> view（'home'）;
}
}
视图如下所示：
<！DOCTYPE html>
< html lang =en>
< head>
< meta http-equiv =X-UA-Compatiblecontent =IE = Edge/>
< meta charset =utf-8>
< meta name =viewportcontent =width = device-width>
< meta name =descriptioncontent =>
<！ - Le styles - >
< title>测试网站< / title>
< script>
var BASEPATH =<？php echo base_url（）;？>;
< / script>
< link href =<？php echo base_url（'assets / css / bootstrap.min.css'）？> rel =stylesheet>
< link href =<？php echo base_url（'assets / css / navbar.css'）？> rel =stylesheet>
< / head>
系统正在死在控制器的构造函数中，我试图加载库...
我到目前为止做了什么：
- 阅读手册。 http://ellislab.com/codeigniter/user-guide/helpers/url_helper.html
尝试在config / autoload.php中包含url库，如下所示：
code> $ autoload ['helper'] = array（'url'）;
$ b b但我仍然得到的错误。
任何建议？
谢谢。
解决方案您忘记了一件关键的事情;
code> class Welcome extends CI_Controller {
public function __construct（）
{
parent :: __ construct（）;
$ this-> load-> helper（'url'）;
}
public function index（）
{
$ this-> load-> view（'home'）;
}
}
parent :: __结构。如果你不这样做;当您覆盖自己的控制器中的__construct时，Controller不会继承它的抽象层。
只要不重写
__ construct一切OK。它只会发生在你覆盖它。你没有加载功能，因为Welcome类是空的（没有继承），即使它扩展了CI_Controller（但使用__ contstruct覆盖）。Background Information
I just installed a fresh copy of CI and modified the welcome controller to include the url Helper so I can call the method
base_url. I then try to call this method fromhome.phpProblem: I'm getting the following error message:
Message: Undefined property: Welcome::$load Filename: controllers/welcome.phpCode:
This is what my welcome controller now looks like:
class Welcome extends CI_Controller { public function __construct() { $this->load->helper('url'); } public function index() { $this->load->view('home'); } }The view looks like this:
<!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="X-UA-Compatible" content="IE=Edge"/> <meta charset="utf-8"> <meta name="viewport" content="width = device-width"> <meta name="description" content=""> <!-- Le styles --> <title>test site</title> <script> var BASEPATH = "<?php echo base_url(); ?>"; </script> <link href="<?php echo base_url('assets/css/bootstrap.min.css')?>" rel="stylesheet"> <link href="<?php echo base_url('assets/css/navbar.css')?>" rel="stylesheet"> </head>The system is dying on the line in the controller's constructor where i try to load the library...
What I've done so far:
- Read the manual. http://ellislab.com/codeigniter/user-guide/helpers/url_helper.html
Tried to include the url library in the config/autoload.php like so:
$autoload['helper'] = array('url');But I'm still getting the error. Any suggestions?
Thanks.
解决方案You forgot a crucial thing;
class Welcome extends CI_Controller { public function __construct() { parent::__construct(); $this->load->helper('url'); } public function index() { $this->load->view('home'); } }The
parent::__construct. If you don't do that; the Controller will not inherit it's abstract layer when you override the __construct in your own controller.As long as you don't override your
__constructit's all ok. It only happens when you override it. You don't have theloadfunctionality because the Welcome class is empty (no inheritance), even if it extends theCI_Controller(but with a__contstructoverride).这篇关于codeigniter返回“Message：Undefined property：Welcome :: $ load”试图加载助手lib的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
