PHP uses CI to implement URL permission control using hooks_PHP tutorial

CI's hook function allows you to change or increase the core running functions of the system without modifying the core system files.

For example, you can run a specific script just before or just after the controller loads, or trigger your script at other times.

Look at the code:

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Add hook statement in system/application/config/hooks.php: <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>
Make the hook system take effect in system/application/config/config.php <br>
       <br>
$config['enable_hooks'] = TRUE; <br>
<br>
Then create a new acl.php permission system configuration file in , of course you can also put it in the database. <br>
<br>
       <br>
//Visitor permission mapping <br>
$config['acl']['visitor'] = array( <br>
​ '' => array('index'),//Homepage www.2cto.com <br>
'music' => array('index', 'list'), <br>
'user' => array('index', 'login', 'register') <br>
); <br>
//Administrator <br>
$config['acl']['admin'] = array( <br>
<br>
); <br>
<br>
//-------------Configure prompt information and jump url for insufficient permissions------------------// <br>
$config['acl_info']['visitor'] = array( <br>
'info' => 'Login required to continue', <br>
'return_url' => 'user/login' <br>
); <br>
<br>
$config['acl_info']['more_role'] = array( <br>
'info' => 'Requires higher privileges to continue', <br>
'return_url' => 'user/up' <br>
); <br>
<br>
/* End of file acl.php */ <br>
/* Location: ./application/config/acl.php */ <br>
<br>
Add acl.php logical processing file in the system/application/hooks directory <br>
<br>
       <br>
class Acl <br>
{ <br>
Private $url_model;//Module accessed, such as: music <br>
Private $url_method;//The accessed method, such as: create <br>
Private $url_param;//The parameter in the url may be 1 or 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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