PHP之运用CI用钩子实现URL权限控制_PHP教程

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</span> <br>
system/application/config/hooks.php中添加钩子声明：<br>
[php]<br>
     <br>
$hook['post_controller_constructor'] = array( <br>
 'class' => 'Acl', <br>
 'function' => 'filter', <br>
 'filename' => 'acl.php', <br>
 'filepath' => 'hooks', <br>
); <br>
 <br>
system/application/config/config.php中让钩子系统生效 <br>
     <br>
$config['enable_hooks'] = TRUE; <br>
 <br>
然后在中新建acl.php权限系统配置文件，当然你也可以放在数据库中。 <br>
 <br>
     <br>
//游客权限映射 <br>
$config['acl']['visitor'] = array( <br>
    '' => array('index'),//首页 www.2cto.com  <br>
    'music' => array('index', 'list'), <br>
    'user' => array('index', 'login', 'register') <br>
); <br>
//管理员 <br>
$config['acl']['admin'] = array( <br>
  <br>
); <br>
  <br>
//-------------配置权限不够的提示信息及跳转url------------------// <br>
$config['acl_info']['visitor'] = array( <br>
    'info' => '需要登录以继续', <br>
    'return_url' => 'user/login' <br>
); <br>
  <br>
$config['acl_info']['more_role'] = array( <br>
    'info' => '需要更高权限以继续', <br>
    'return_url' => 'user/up' <br>
); <br>
  <br>
/* End of file acl.php */ <br>
/* Location: ./application/config/acl.php */ <br>
 <br>
system/application/hooks目录下添加acl.php逻辑处理文件 <br>
 <br>
     <br>
class Acl <br>
{ <br>
    private $url_model;//所访问的模块，如：music <br>
    private $url_method;//所访问的方法，如：create <br>
    private $url_param;//url所带参数 可能是 1 也可能是 id=1&name=test <br>
    private $CI; <br>
  <br>
    function Acl() <br>
    { <br>
        $this->CI = & get_instance(); <br>
        $this->CI->load->library('session'); <br>
  <br>
        $url = $_SERVER['PHP_SELF']; <br>
        $arr = explode('/', $url); <br>
        $arr = array_slice($arr, array_search('index.php', $arr) + 1, count($arr)); <br>
        $this->url_model = isset($arr[0]) ? $arr[0] : ''; <br>
        $this->url_method = isset($arr[1]) ? $arr[1] : 'index'; <br>
        $this->url_param = isset($arr[2]) ? $arr[2] : ''; <br>
    } <br>
  <br>
    function filter() <br>
    { <br>
        $user = $this->CI->session->userdata('user'); <br>
        if (emptyempty($user)) {//游客visitor <br>
            $role_name = 'visitor'; <br>
        } else { <br>
            $role_name = $user->role; <br>
        } <br>
  <br>
        $this->CI->load->config('acl'); <br>
        $acl = $this->CI->config->item('acl'); <br>
        $role = $acl[$role_name]; <br>
        $acl_info = $this->CI->config->item('acl_info'); <br>
  <br>
        if (array_key_exists($this->url_model, $role) && in_array($this->url_method, $role[$this->url_model])) { <br>
            ; <br>
        } else {//无权限，给出提示，跳转url <br>
            $this->CI->session->set_flashdata('info', $acl_info[$role_name]['info']); <br>
            redirect($acl_info[$role_name]['return_url']); <br>
        } <br>
    } <br>
} <br>
<br>
摘自 I am heweilun						
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