php 在 CodeIgniter 中扩展控制器类
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Extending The Controller Class in CodeIgniter
提问by Yekver
I have class MY_Controller extends CI_Controllerand common logic for big profile section, so I'va tried to create class Profile extends MY_Controllerwith common logic for profile section and all class related to this section should extends this Profile class as I understand right, but when I tried to create class Index extends ProfileI recieve an error:
我有class MY_Controller extends CI_Controller大配置文件部分的通用逻辑，因此我尝试class Profile extends MY_Controller使用配置文件部分的通用逻辑创建，并且与此部分相关的所有类都应按照我的理解扩展此 Profile 类，但是当我尝试创建时class Index extends Profile收到错误：
Fatal error: Class 'Profile' not found
CodeIgniter tries to find this class in index.phpwhich I am running.
CodeIgniter 试图找到index.php我正在运行的这个类。
Where is my mistake? Or maybe there is anoter better way to mark out common logic?
我的错误在哪里？或者也许有另一种更好的方法来标记通用逻辑？
回答by Rooneyl
I take it you have put your MY_Controller in /application/core, and set the prefix in the config. I would be careful about using index as a class name though. As a function/method in Codeigniter it has a dedicated behaviour.
我认为您已将 MY_Controller 放在 /application/core 中，并在配置中设置前缀。不过，我会小心使用索引作为类名。作为 Codeigniter 中的一个函数/方法，它有一个专门的行为。
If you then want to extend that controller you need to put the classes in the same file.
如果您想扩展该控制器，您需要将这些类放在同一个文件中。
E.g. In /application core
例如在/应用程序核心
/* start of php file */
class MY_Controller extends CI_Controller {
public function __construct() {
parent::__construct();
}
...
}
class another_controller extends MY_Controller {
public function __construct() {
parent::__construct();
}
...
}
/* end of php file */
In /application/controllers
在/应用程序/控制器
class foo extends MY_Controller {
public function __construct() {
parent::__construct();
}
...
}
or
或者
class bar extends another_controller {
public function __construct() {
parent::__construct();
}
...
}
回答by AdmiralThrawn
I found this page on Google because I had the same problem. I didn't like the answers listed here so I created my own solution.
我在谷歌上找到了这个页面，因为我遇到了同样的问题。我不喜欢这里列出的答案，所以我创建了自己的解决方案。
1) Place your parent class in the corefolder.
1）将您的父类放在core文件夹中。
2) Place an include statement at the beginning of all classes that include the parent class.
2) 在包含父类的所有类的开头放置一个 include 语句。
So a typical controller might look like this:
所以一个典型的控制器可能是这样的：
<?php
require_once APPPATH . 'core/Your_Base_Class.php';
// must use require_once instead of include or you will get an error when loading 404 pages
class NormalController extends Your_Base_Class
{
public function __construct()
{
parent::__construct();
// authentication/permissions code, or whatever you want to put here
}
// your methods go here
}
The reason I like this solution is, the whole point of creating a parent class is to cut down on code repetition. So I don't like the other answer that suggested copy/pasting the parent class into all of your controller classes.
我喜欢这个解决方案的原因是，创建父类的重点是减少代码重复。所以我不喜欢另一个建议将父类复制/粘贴到所有控制器类中的答案。
回答by Cem Y?ld?z
It is possible with Codeigniter 3. Just including the parent file is enough.
Codeigniter 3 是可能的。只包含父文件就足够了。
require_once(APPPATH."controllers/MyParentController.php");
class MyChildController extends MyParentController {
...
回答by Alexey Gerasimov
All classes you are extending should live in application/CORE directory so in your case both My_Controller and Profile should live there. All "end point" controllers will live in application/controllers folder
您要扩展的所有类都应位于 application/CORE 目录中，因此在您的情况下 My_Controller 和 Profile 都应位于该目录中。所有“端点”控制器都将位于 application/controllers 文件夹中
UPDATE
更新
I stand corrected. Extended classes should live in the same file. @Rooneyl's answer shows how to implement
我站着纠正。扩展类应该存在于同一个文件中。@Rooneyl 的回答显示了如何实施
回答by Master James
After some struggle with version 3 and this issue I decided this was not a bad solution...
在与版本 3 和这个问题进行了一些斗争之后，我认为这不是一个糟糕的解决方案......
require_once BASEPATH.'core/Controller.php';
require_once APPPATH.'core/MYCI_Controller.php';
to add this second line where the first exists in the system/core/CodeIgniter.php
添加第二行，其中第一行存在于 system/core/CodeIgniter.php
[If it's not too late, I recommend strongly against php and/or CodeIgniter.]
[如果还不算太晚，我强烈建议不要使用 php 和/或 CodeIgniter。]
