PHP-权限控制类

<?php /** * 权限控制类 */ class include_purview { /** * 类的唯一实例 */ private static $instance; /** * 权限常量 */ const SELECT = 0x1; //查询 const CREATE = 0x2; //添加 const EDIT = 0x4; //修改 const DELETE = 0x8; //删除 /** * 角色 */ private $annoy = ''; //匿名用户 private $user = ''; //注册用户 private $admin = ''; //管理用户 private $usertype = 'annoy'; private $hashtable = array(1=>'查询',2=>'添加',4=>'修改',8=>'删除'); /** * */ public function __set($name,$value) { if ($name == 'usertype') { if ($value != '') { $this->usertype = $value; } } } /** * 构造函数 给角色赋予权限 */ private function __construct() { $this->annoy = self::SELECT; $this->user = self::SELECT | self::CREATE; $this->admin = self::SELECT | self::CREATE | self::EDIT | self::DELETE; } /** * 获取类的唯一实例 */ public static function getInstance() { if (self::$instance === null){ self::$instance = new include_purview(); } return self::$instance; } /** * 检查权限 * * @param $usertype 角色 * @param $purview 权限 */ public function check($purview) { if ($this->{$this->usertype} & $purview) { return true; } return false; } /** * 给角色加权限 */ public function addPur($purview) { $this->{$this->usertype} |= $purview; } /** * 给角色减权限 */ public function delPur($purview) { $this->{$this->usertype} ^= $purview; } /** * 返回角色拥有的权限 */ public function getPur() { $arr = array(); foreach ($this->hashtable as $k => $v) { if ($k & $this->{$this->usertype}) { $arr[] = $v; } } return $arr; } } 调用示例 PHP代码 /** * 示例 */ //在session中读用户组 @session_start(); $_SESSION['role'] = 'user'; //获取权限类的实例 $pruview = include_purview::getInstance(); //设置角色 $pruview->usertype = $_SESSION['role']; //获取该角色拥有的权限 $arr = $pruview->getpur(); echo '该用户的权限有:'.join(',',$arr)."\n"; //判断执行的操作是否有权限 if (true === $pruview->check(include_purview::CREATE )) { create(); //要执行的操作 } else { exit('您没有权限!'); } //去掉用户的添加权限 $pruview->delPur(include_purview::CREATE ); $arr = $pruview->getpur(); echo '该用户的权限有:'.join(',',$arr)."\n"; //执行添加操作 if (true === $pruview->check(include_purview::CREATE )) { create(); //要执行的操作 } else { echo '您没有权限!'."\n"; } //加上用户的添加权限 $pruview->addPur(include_purview::CREATE ); $arr = $pruview->getpur(); echo '该用户的权限有:'.join(',',$arr)."\n"; //执行添加操作 if (true === $pruview->check(include_purview::CREATE )) { create(); //要执行的操作 } else { exit('您没有权限!'); } //具体的操作 function create() { echo '执行了添加操作'."\n"; }