ci框架

1. ci背景

ci在这里是一个php框架，官网地址: https://codeigniter.org.cn/

2. 特点

2.1 键值对object管理

load_class管理对象加载，负责jd生成加载快的对象，存入在键值对中，方便复用。

 1     /**
 2      * Class registry
 3      *
 4      * This function acts as a singleton. If the requested class does not
 5      * exist it is instantiated and set to a static variable. If it has
 6      * previously been instantiated the variable is returned.
 7      *
 8      * @param    string    the class name being requested
 9      * @param    string    the directory where the class should be found
10      * @param    mixed    an optional argument to pass to the class constructor
11      * @return    object
12      */
13     function &load_class($class, $directory = 'libraries', $param = NULL)
14     {
15         static $_classes = array();
16 
17         // Does the class exist? If so, we're done...
18         if (isset($_classes[$class]))
19         {
20             return $_classes[$class];
21         }
22 
23         $name = FALSE;
24 
25         // Look for the class first in the local application/libraries folder
26         // then in the native system/libraries folder
27         foreach (array(APPPATH, BASEPATH) as $path)
28         {
29             if (file_exists($path.$directory.'/'.$class.'.php'))
30             {
31                 $name = 'CI_'.$class;
32 
33                 if (class_exists($name, FALSE) === FALSE)
34                 {
35                     require_once($path.$directory.'/'.$class.'.php');
36                 }
37 
38                 break;
39             }
40         }
41 
42         // Is the request a class extension? If so we load it too
43         if (file_exists(APPPATH.$directory.'/'.config_item('subclass_prefix').$class.'.php'))
44         {
45             $name = config_item('subclass_prefix').$class;
46 
47             if (class_exists($name, FALSE) === FALSE)
48             {
49                 require_once(APPPATH.$directory.'/'.$name.'.php');
50             }
51         }
52 
53         // Did we find the class?
54         if ($name === FALSE)
55         {
56             // Note: We use exit() rather than show_error() in order to avoid a
57             // self-referencing loop with the Exceptions class
58             set_status_header(503);
59             echo 'Unable to locate the specified class: '.$class.'.php';
60             exit(5); // EXIT_UNK_CLASS
61         }
62 
63         // Keep track of what we just loaded
64         is_loaded($class);
65 
66         $_classes[$class] = isset($param)
67             ? new $name($param)
68             : new $name();
69         return $_classes[$class];
70     }

基于这个特点，多次load_class会加载出在其它地方操作过的对象···

3. 自测

以version = 3.1.11为例

3.1 post/get/delete等等自测举例

若在本地进行test验证，需要准备相关全局变量: $_SERVER, $routing

其中$routing, 为ci框架的全局变量

下面是发起一个接口的请求，在cli中实现，需要注意的是在arena项目中，ci框架的入口文件，需要专门编辑出来一个cli文件，可以考虑直接copy所属app运行目录的index.php文件。

 1 /**
 2  * @brief test func
 3  */
 4 //入参准备
 5 $_POST = [
 6     "a" => b,
 7 ];
 8 //地址准备
 9 $_SERVER['CI_ENV'] = "local";
10 $_SERVER['REQUEST_METHOD'] = "POST";
11 $routing["directory"] = "api";
12 $routing["controller"] = "test";
13 $routing["function"] = "func";

准备完这些后，多数api已经能足够完成自测。

3.2 接口入参注入自测

而ci框架，还支持一种关于入参注入的功能。

举例如下

1 class testN {
2   public function coinInfinite($id) {
3     var_dump($id);
4   }
5 }

即在函数的api层面，支持params的设定，而非通过php兼容的入参协议获得。

通过排查，ci框架的核心类:

arena/src/system/core/URI.php

会操作 $_SERVER全局变量中的元素argv

arena/src/system/core/Router.php

依据ci键值对object的操作，将CI_URI对象，复用在CI_Router中。

CI_Router->_set_routing()由该函数实现

所以根据于此，示例如下

1 /**
2  * @brief test api func
3  */
4 
5 //地址准备
6 $_SERVER['CI_ENV'] = "local";
7 $_SERVER['REQUEST_METHOD'] = "GET";
8 array_push($_SERVER['argv'], "api/test/func/123");

argv新插入的数组元素中的123，就是注入到举例函数: coinInfinite中的入参 $id