权限控制的一个思路
数据库表结构
<span CREATE</span> <span TABLE</span><span `NewTable` ( `id` </span><span int</span>(<span 11</span>) <span NOT</span> <span NULL</span><span AUTO_INCREMENT, `title` </span><span varchar</span>(<span 255</span>) <span NOT</span> <span NULL</span><span , `menu_id` </span><span int</span>(<span 11</span>) <span NOT</span> <span NULL</span><span , `module` </span><span varchar</span>(<span 50</span>) <span NOT</span> <span NULL</span><span , `class` </span><span varchar</span>(<span 50</span>) <span NOT</span> <span NULL</span><span , `method` </span><span varchar</span>(<span 50</span>) <span NOT</span> <span NULL</span><span PRIMARY</span> <span KEY</span><span (`id`) );</span>
假定我们使用了MVC的结构,并通过url访问对应的模块及类和函数。
表中第一行表示一个操作,title表示操作名,menu_id表示属于哪一个菜单选项,module表示模块名(没有可以略过),class表示类名,method表示函数名
此外我们还需要一个用户组的表,大致如下:
其中access_list中保存的当前用户组所拥有的权限ID(对应上个权限表中的ID)
当然我们还需要一个用户表来对应用户组表
group_id表示的第用户所对应的用户组
当我们访问一个url的时候,比如:
http://testApp.test.com/index.php/module/testModule/testClass/testAction
通过路由分析,我们得到相应的数据:
模块->testModule
类->testClass
函数->testAction
通过三个参数,我们查找权限表中的数据,得到一个唯一的id值。
然后对比用户组中access_list中的数据,如果数据中包括有这个id,那么当前用户拥有当前操作的权限,反之没有权限。
那么我们如何来控制菜单选项,当用户有权限时才显示呢?
因为在权限表中的每个操作都对应有一个menu_id,即菜单选项。我们通过查找当前用户所属于的用户组信息,得到他所拥有的权限操作ID,再通过ID取得他所属于的菜单选项,这样就得到了当前用户所拥有的菜单权限。

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