PHP异位或加密实现自动登陆

来源：互联网发布：wps办公软件官网编辑：程序博客网时间：2024/05/17 06:59

1.在Common/function.php中

/** * 异位或加密字符串 * @param [String] $value [需要加密或解密的字符串] * @param [integer] $type [0:加密 1:解密] * @param [String]   [返回加密或解密的字符串] */function encryption($value, $type = 0){$key = md5(C('ENCRYPTION_KEY'));//加密if(!$type){return  str_replace('=', '', base64_encode($value ^ $key));}//解密$value = base64_decode($value);return $value ^ $key;}

2.当勾选自动登陆时

//登陆处理    public function signIn(){        if(!IS_AJAX){            $this->redirect('Login/index');        }        $array = array();        $username = trim(I('post.username'));        $password = trim(MD5(I('post.password')));        $auto = I('post.auto');        $admin = M('admin');        $uc = $admin->where(array('username'=>$username))->find();        if($uc){            if($uc['password'] == $password){                $_SESSION['id'] = $uc['id'];                $_SESSION['username'] = $uc['username'];                //自动登陆功能实现                  if($auto){                    $account = $uc['username'];                 //取得用户名                      $ip = get_client_ip();                      //获取客户端IP                      $value = $account . '|' . $ip;                      $value = encryption($value);                    cookie('auto',$value);                }                  $array['msg'] = 1;                $array['url'] = '/Admin/Index/index';            }else{                $array['msg'] = '密码错误';            }        }else{            $array['msg'] = '账号不存在';        }        exit(json_encode($array));    }}

3.公共头部判断是否上次登录

//自动登陆处理if(isset($_COOKIE['auto']) && !isset($_SESSION['id'])){              $value = explode('|', encryption($_COOKIE['auto'], 1));              $ip = get_client_ip();              //本次登陆IP和上次登陆IP相匹配              if($ip == $value['1']){                  $where = array('username' => $value['0']);                  $user = M('admin')->where($where)->find();                  //查看是否存在这个用户或者这个用户被锁定                  if($user){                      $_SESSION['id'] = $user['id'];                  }              }          }

4.视图页面代码

<input type="checkbox" name='auto' checked='1' class='auto' id='auto'/><label for="auto">下次自动登录</label>

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