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CodeIgniter框架中_remap()使用方法2例_php实例

Jun 07, 2016 pm 05:21 PM
codeigniter codeigniterframework

一、CodeIgniter手册相关介绍
URI 的第二片段决定会调用控制器中的哪个方法。CodeIgniter 允许你使用 _remap() 方法来废除这种规则:

复制代码 代码如下:
public function _remap() 

    // Some code here... 
}

注意:如果你的控制器中包含一个名为 _remap() 的方法,那么不管你的 URI 中包含什么,它总会被忽略掉。这个方法会废除掉由 URI 片段来决定哪个方法被调用的规则,允许你重新定义调用方法的规则(方法的路由规则)。
既可以通过example.com/index.php/ blog /   来调用_remap()的方法,若_remap()有参数,则在/后加参数,调用具体的代码。
二、使用方法2例
但问题是,手册上这样说的,会有什么用处呢?其实用处有两个:

1、改变URL,隐藏方法,比如你的应用中,原来的URL方法是: 

复制代码 代码如下:
example.com/index.php/blog/say

现在想改变显示的方法名为: 
复制代码 代码如下:
example.com/index.php/blog/hello

但显示虽然是hello,但实际上是调用存在的say方法
2、还可以借这个函数做简单的函数方法权限控制,比如:
复制代码 代码如下:
public function _remap($method, $params = array()) 

    $user_type = $_SESSION['user_type']; 
    $access_control = $this->validate_access($user_type,$method); 
    if ($access_control){ 
        $this->$method(); 
    } 
    else{ 
        $this->show_message(); 
    } 
}

首先取出用户session中的级别 $user_type,然后检查通过方法  validate_access这个用户有无权限调用这个方法($method) ,如果有的话$access_control==true了,否则显示出错信息。
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