CI框架鉤子功能——權限控制

1.相關資料http://codeigniter.org.cn/user_guide/general/hooks.html

2.打開權限控制功能在 application/config/config.php 文件中設定: 

$config['enable_hooks'] = TRUE;

3.在項目目錄下的application/config/hoos.php文件定義相關的鈎子，例:

$hook['post_controller_constructor'] = array(
		'class' => 'Acl',
		'function' => 'filter',
		'filename' => 'acl.php',
		'filepath' => 'hooks',
);

4.在項目目錄下的application/hooks和application/config下添加acl.php文件

以下為application/hooks/acl.php的相關代碼

<?php
class Acl
{

	private $url_model;//所訪問的模塊，如：music
	private $url_method;//所訪問的方法，如：create
	private $url_param;//url所帶參數 可能是 1 也可能是 id=1&name=test
	private $CI;

	function Acl()
	{
		$this->CI = & get_instance();
		$this->CI->load->library('session');
	
		$url = $_SERVER['PHP_SELF'];
		$arr = explode('/', $url);
		$arr = array_slice($arr, array_search('index.php', $arr) + 1, count($arr));
		$this->url_model = isset($arr[0]) ? $arr[0] : '';
		$this->url_method = isset($arr[1]) ? $arr[1] : 'index';
		$this->url_param = isset($arr[2]) ? $arr[2] : '';
	}

	/**
	 * 權限過濾
	 */
	function filter()
	{
		$user = $this->CI->session->userdata('user');
		if (empty($user))
		{
			//遊客guest
			$role_name = 'guest';
		} else {
			//admin  teacher  student
			$role_name = $user->role;
		}
	
		$this->CI->load->config('acl');
		$acl = $this->CI->config->item('acl');
		$role = $acl[$role_name];
		$acl_info = $this->CI->config->item('acl_info');
	
		if (array_key_exists($this->url_model, $role) && in_array($this->url_method, $role[$this->url_model]))
		{
			;
		} else {
			//無權限，給出提示，跳轉url
			$this->CI->session->set_flashdata('info', $acl_info[$role_name]['info']);
			redirect($acl_info[$role_name]['return_url']);
		}
	}

	

}

?>

以下為application/config/acl.php的相關代碼

<?php
//權限映射  start
//遊客
$config['acl']['guest'] = array(
		'' => array('index'),
		'users' => array('login')
);
//管理員
$config['acl']['admin'] = array(

);
//權限映射 end


//配置權限不夠的提示信息以及跳轉url start
$config['acl_info']['guest'] = array(
		'info' => '需要登錄以繼續',
		'return_url' => 'users/login'
);

$config['acl_info']['more_role'] = array(
		'info' => '需要更高權限以繼續',
		'return_url' => 'users/up'
);
// 配置權限不夠的提示信息以及跳轉url end

?>

之後若需要給用戶添加頁眉權限時，在application/config/acl.php修改即可