php 一个用户组别访问权限控制的例子

这是在一个项目中，接触到的比较好的一个权限控制系统，重要的是里面的思想，框架借用了ThinkPHP3.2，其实不用TP也可以，你可以很方便的二次开发。

   先说数据库权限相关表的结构：

CREATE TABLE `admin` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '管理员主键',
`admin_name` varchar(20) NOT NULL COMMENT '用户名',
`password` varchar(32) NOT NULL COMMENT '密码',
`last_time` int(11) DEFAULT NULL COMMENT '最近登录时间',
`last_ip` varchar(20) DEFAULT NULL COMMENT '最近登录IP',
PRIMARY KEY (`id`),
UNIQUE KEY `admin_name` (`admin_name`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC COMMENT='管理员用户表';

CREATE TABLE `group` (
`id` int(4) NOT NULL AUTO_INCREMENT COMMENT '主键，标识',
`group_name` varchar(14) NOT NULL COMMENT '管理组名称',
`group_infor` varchar(200) NOT NULL COMMENT '管理组说明',
`rank` int(2) NOT NULL COMMENT '排序',
PRIMARY KEY (`id`),
UNIQUE KEY `group_name` (`group_name`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC COMMENT='管理员组表';

CREATE TABLE `admin_group` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`admin_id` int(11) NOT NULL COMMENT '管理员ID, admin表的主键',
`group_id` int(11) NOT NULL COMMENT '管理组id, group表的主键',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC COMMENT='管理员所属管理组表';

CREATE TABLE `webmenu` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`menu_name` varchar(20) NOT NULL COMMENT '菜单名',
`menu_rank` int(11) NOT NULL COMMENT '排序',
`menu_controllers` varchar(200) NOT NULL COMMENT '菜单所属控制器',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC COMMENT='菜单表';

CREATE TABLE `power` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`pid` int(3) NOT NULL COMMENT '菜单id, webmenu表的主键',
`title` varchar(20) NOT NULL COMMENT '权限名称',
`type` int(2) NOT NULL COMMENT '操作类型： 1 操作控制 ； 2 菜单类别； 3 其他类别',
`rank` int(2) NOT NULL COMMENT '排序',
`power_id` varchar(40) NOT NULL DEFAULT '' COMMENT 'module-controller-action',
PRIMARY KEY (`id`),
UNIQUE KEY `power_id` (`power_id`) USING BTREE,
KEY `id` (`id`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC COMMENT='权限表';

CREATE TABLE `admin_power` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`admin_id` int(11) NOT NULL COMMENT '用户id',
`power_id` int(11) NOT NULL COMMENT '权限表id',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC COMMENT='用户权限表';

CREATE TABLE `group_power` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`group_id` int(11) NOT NULL COMMENT '用户组id',
`power_id` int(11) NOT NULL COMMENT '权限表id',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC COMMENT='用户组权限表';
";

  权限控制器CheckPower的代码：

namespace Home\Controller;

use Think\Controller;

class CheckPowerController extends Controller
{

    
     public function _initialize ()

     {

          // 判断是否登录
          $admin_id = $_SESSION['admin_id'];  // TP下可以写出session('admin_id');
         if ( empty($admin_id) ) {

             $this->error('登录超时', U('Index/login'));
         }

         // 操作方法的权限判断
         $auth= new \ClassLib\Power();
         if ( !$auth->check( $admin_id, MODULE_NAME.'-'.CONTROLLER_NAME.'-'.ACTION_NAME ) ) {

             $this->error('你没有权限');
         }

     }

}

这里把模块-控制器-方法拼装好，和用户id一起传到权限检查类的check方法中检查。

看一下文件位置：




文件内容：

namespace ClassLib;

class Power
{

    // 权限检查        public function check ( $admin_id, $m_c_a_url )

    {

        $power_arr = $this->getAllPowers( $admin_id );
        $power = M('power');
        $map['power_id'] = strtolower($m_c_a_url);
        $power_id = $power->field('id')->where( $map )->find();
        return in_array($power_id['id'], $power_arr);
    }

    // 获取用户（及所在用户组）权限 
    public function getAllPowers ( $admin_id )

    {

        // 用户个人权限
        $power_admin = $this->getPowers( $admin_id, 'admin');
        // 获取所属用户组的id
        $groups_id_arr = $this->getGroups( $admin_id );
        // 所属用户组的权限
        $power_group = $this->getPowers( $groups_id_arr, 'group');

        $power_admin = !empty($power_admin ) ? $power_admin : array();
        $power_group = !empty($power_group ) ? $power_group : array();

        //合并用户权限  和 用户组权限
        $power_arr = array_unique( array_merge( $power_admin, $power_group ) );

        return $power_arr;
    }

    public function getGroups ( $admin_id )

    {

        $group_ID_arr = NULL;

        $map['admin_id'] = $admin_id;
        $data = M("admin_group")->where( $map )->select();

        if ( !is_null($data) ) {

            foreach ($data as $key => $value)

            {

                $group_ID_arr[] = $value['group_id'];
            }

        }

        return $group_ID_arr;
    }

    public function getPowers ( $ids, $type )

    {

        $power_arr = null;
        $data = null;

        if ( $type == 'admin' ) {

            $condition['admin_id'] = $ids;
             $data = M("admin_power")->where( $condition )->select();
        } elseif ($type == 'group') {

             $condition['group_id'] = array('in', $ids);
            $data = M("group_power")->where( $condition )->select();
        }

        if ( !is_null($data) ) {

            foreach ($data as $key => $value)

            {

                $power_arr[] = $value['power_id'];
            }

        }

        return $power_arr;
    }

     // 生成菜单       public function getMenu ( $admin_id )

    {

        $power_arr = $this->getAllPowers( $admin_id );
        if ( empty($power_arr) ) {

            exit('好像管理员忘记给你分配权限了。');
        }

        $power = M('power');
        $where['id'] = array('in', $power_arr);
        // 读取到权限的所有属性
        $power_list = $power->where($where)->order('rank')->select();

        // 所有的菜单大类
        $webmenu = M('webmenu');
        $webmenu_list = $webmenu->order('menu_rank')->select();
        $len_webmenu_list = count($webmenu_list);

        // 循环把权限属性，整理到菜单数组中去
        for ( $i = 0; $i < $len_webmenu_list; $i++ )

        {

            for ( $j = 0; $j < count($power_list); $j++ )

            {

                // 判断这个菜单下有无菜单类型权限
                if ( $power_list[$j]['pid'] == $webmenu_list[$i]['id'] ) {

                    $webmenu_list[$i]['power'][$power_list[$j]['id']] = $power_list[$j];
                }

            }

        }

        // 菜单html拼接
        $menu_html = '';
        for ( $i = 0; $i < $len_webmenu_list; $i++ )

        {

            $ispower = false;  // 当前菜单是否有子菜单
            $menu_li = null;  // 当前菜单的子菜单拼装
            foreach ( $webmenu_list[$i]['power'] as $key => $value )

            {

                if ( $value['type'] == 2 ) {

                    $action = explode('-', $value['power_id']);
                    $len_action = count($action);
                    if ( $len_action == 3 ) {

                        if ( $action[0] != 'home' ) {

                            $url = $action[0] . '/' . $action[1] . '/' . $action[2];
                        } else {

                            $url = $action[1] . '/' . $action[2];
                        }

                    } else {

                        $url = '#';
                    }