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HomeBackend DevelopmentPHP TutorialCI框架中libraries,helpers,hooks文件夹详细说明_php实例

1.library文件夹

如果你想扩展CI的功能,那么就把你的类库放在这,注意,这个文件夹是有class组成的,可以看看如果加载library注意事项!

2.helper文件夹

如果你需要使用一些函数来帮你完成一些小功能,那么就把它放着,这里都是过程式的代码而不是类,一般helper是用于view的,
使用方法如下:

复制代码 代码如下:

$this->load->helper('filename')

filename是辅助函数对应的文件名,不包括_helper.php扩展名。文件名应该保存为:filename_helper.php,放在helper文件夹下!

3.hooks文件夹

存放你创建的钩子。钩子是 用来装载其它文件的控制方法,不能被控制器等调用,是系统自动调用的。当 CodeIgniter
运行后,它会产生出一个特殊的进程。
当然,您可以自定义一些动作来替代程序运行过程中的某些阶段。例如,您可以在控制器刚刚载入前或刚刚载入后来运行特定的脚本,或者在其他时刻来触发您的脚本。

CI的七个挂载点:

pre_system

系统执行的早期调用.仅仅在benchmark 和 hooks 类 加载完毕的时候. 没有执行路由或者其它的过程.

pre_controller

在调用你的任何控制器之前调用.此时所用的基础类,路由选择和安全性检查都已完成.

post_controller_constructor

在你的控制器实例化之后,任何方法调用之前调用.

post_controller

在你的控制器完全运行之后调用.

display_override

覆盖_display()函数, 用来在系统执行末尾向web浏览器发送最终页面.这允许你用自己的方法来显示.注意,你需要通过$this->CI =& get_instance()引用 CI 超级对象,然后这样的最终数据可以通过调用$this->CI->output->get_output()来获得。

cache_override

可以让你调用自己的函数来取代output类中的_display_cache()函数.这可以让你使用自己的缓存显示方法

post_system

在最终着色页面发送到浏览器之后,浏览器接收完最终数据的系统执行末尾调用 
关于钩子的使用,手册上有详细的使用说明,截图如下:

CI框架中libraries,helpers,hooks文件夹详细说明_php实例

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