如何检索codeigniter钩子中的第三个uri段 [英] How to retrieve the third uri segment in a codeigniter hook

问题描述

我正在写一个自定义的post_controller钩子。我们知道，codeigniter uri结构是这样的：

I'm writing a custom post_controller hook. As we know, codeigniter uri structure is like this:

example.com/class/function/id/

和我的代码：

function hook_acl()
{
    global $RTR;
    global $CI;

    $controller = $RTR->class; // the class part in uri
    $method = $RTR->method; // the function part in uri
    $id = ? // how to parse this?

    // other codes omitted for brevity
}

已经浏览了核心的Router.php文件，这让我很困惑。

I've browsed the core Router.php file, which puzzled me a lot.

谢谢。

推荐答案

使用CodeIgniter URI核心类

通常在CodeIgniter Hooks 中，我们需要加载/实例化URI核心类

Using CodeIgniter URI core class

Generally within CodeIgniter Hooks, we need to load/instantiate the URI core class to reach the methods.

• 对于 post_controller_constructor ， post_controller ，... hooks，我们可以获得CodeIgniter超级对象并使用 uri 类：





• For post_controller_constructor, post_controller, ... hooks, we can get the CodeIgniter super object and use use the uri class:

# Get the CI instance
$CI =& get_instance();

# Get the third segment
$CI->uri->segment(3);







• 但 > pre_controller hook，我们没有访问CodeIgniter超级对象因此我们必须手动加载URI核心类如下：


• But for pre_controller hook, we don't have access to CodeIgniter super object So we have to load the URI core class manually as follows:

# Load the URI core class
$uri =& load_class('URI', 'core');

# Get the third segment
$id = $uri->segment(3); // returns the id





使用纯PHP





在此方法中，您可以使用 $ _ SERVER 数组来获取URI段：

Using pure PHP

In this approach you can use $_SERVER array to fetch the URI segments as:

$segments = explode('/', trim($_SERVER['REQUEST_URI'], '/'));

$controller = $segments[1];
$method     = $segments[2];
$id         = $segments[3];

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