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ThinkPHP3.2.2实现持久登录(记住我)功能的方法

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ThinkPHP3.2.2实现持久登录(记住我)功能的方法

本文实例讲述了ThinkPHP3.2.2实现持久登录功能的方法。分享给大家供大家参考,具体如下:

实现持久登录,即用户在登录时,勾选了"记住我"之后,无论是否关闭浏览器,只要不退出登录,在指定的时间内始终保持登录状态(缺点是在另一台电脑上登录过后,之前那台电脑就不能继续保持登录状态)。

首先,持久登陆使用 cookie 实现,但是 cookie 中不能保存用户密码这样重要的信息,即使加密过。解决方案是在用户登录表中新建3个字段identifier:第二身份标识,token:永久登录标识,timeout:永久登录超时时间。

+------------+-------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+-------------+------+-----+---------+----------------+
| uid | int(11) | NO | PRI | NULL | auto_increment |
| uname | varchar(20) | YES | | NULL | |
| upwd | varchar(20) | YES | | NULL | |
| uflag | int(11) | YES | | NULL | |
| identifier | varchar(32) | YES | | NULL | |
| token | varchar(32) | YES | | NULL | |
| timeout | int(11) | YES | | NULL | |
+------------+-------------+------+-----+---------+----------------+

在用户勾选了"记住我"登录时,应该生成一个唯一的 identifier,一个唯一的 token,并且设置一个过期时间 timeout,把两个代表身份的值写入cookie,设置 cookie 过期时间为 timeout,例如:setcookie('auth',"$identifier:$token",$timeout); 同时把三个值插入数据表;当用户再一次访问网站时,首先判断 cookie 中是否含有 auth,如果含有,则去数据库中进行身份比对(identifier 和 token),比对成功时,把用户信息写入 session,同时用户保持登录状态。

代码:

控制器 TestController.class.php

checkLong();
  //已经登录则跳转至个人中心
  if(isset($_SESSION['username'])){
   $this->redirect('Test/ucenter');
  }else{
   //判断是否存在cookie
   if(isset($_cookie['username'])){
    $this->assign('username',$_cookie['username']);
   }
   //显示注册页
   $this->display("test");
  }
 }
 //显示验证码
 public function verifyImg(){
  $verify = new ThinkVerify();
  //$verify->useZh = true; //使用中文验证码
  $verify->length = 4; 
  $verify->entry();
 }
 //验证登录
 public function check(){
  $verify = new ThinkVerify();
  if($verify->check(I("yzm"))){
   //判断用户名密码
   $user = new TestModelTestModel();
   $res = $user->checkName(I("username"),I("pwd"));
   if($res === false){
    echo "用户名或密码错误";
   }else{
    //用户信息存入session
    session("username",$res['uname']);
    session("id",$res['uid']);
    //如果用户勾选了"记住我",则保持持久登陆
    if(I("remember")){
     $salt = $this->random_str(16);
     //第二分身标识
     $identifier = md5($salt . md5(I("username") . $salt));
     //永久登录标识
     $token = md5(uniqid(rand(), true));
     //永久登录超时时间(1周)
     $timeout = time()+3600*24*7;
     //存入cookie
     setcookie('auth',"$identifier:$token",$timeout);
     $user->saveRemember($res['uid'],$identifier,$token,$timeout);
    }
    //把用户名存入cookie,退出登录后在表单保存用户名信息
    setcookie('username',I('username'),time()+3600*24);
    //跳转至会员中心
    $this->redirect('Test/ucenter');
   }
  }else{
   echo "输入错误";
  }
 } 
 //测试strstr函数
 public function strstrtest(){
  $param = "ThinkVerify";
  //第三个参数为true,返回'Think';没有第三个参数,返回'Verify'
  $name = strstr($param,'\',true);
  echo $name;
 }
 //用户中心
 public function ucenter(){
  //判断是否永久登录
  $this->checkLong();
  $this->assign("session",$_SESSION);
  $this->display("ucenter");
 }
 //退出登录
 public function loginout(){
  session(null);
  setcookie('auth', '', time()-1);
  $this->redirect("Test/login");
 }
 //生成随机数,用于生成salt
 public function random_str($length){
  //生成一个包含 大写英文字母, 小写英文字母, 数字 的数组
  $arr = array_merge(range(0, 9), range('a', 'z'), range('A', 'Z'));
  $str = '';
  $arr_len = count($arr);
  for ($i = 0; $i < $length; $i++){
   $rand = mt_rand(0, $arr_len-1);
   $str.=$arr[$rand];
  }
  return $str;
 }
 //判断是否持久登录
 public function checkLong(){
  $check = new TestModelTestModel();
  $is_long = $check->checkRemember();
  if($is_long === false){
  }else{
   session("username",$is_long['uname']);
   session("id",$is_long['uid']);
  }
 }
}

模型 TestModel.class.php

getByUname($name);
  if($info != null){
   //验证密码
   if($info['upwd'] == $pwd){
    return $info;
   }else{
    return false;
   }
  }else{
   return false;
  }
 }
 //当用户勾选"记住我"
 public function saveRemember($uid,$identifier,$token,$timeout){
  $admin = M("admin");
  $data['identifier'] = $identifier;
  $data['token'] = $token;
  $data['timeout'] = $timeout;
  $where = " uid = ".$uid;
  $res = $admin->data($data)->where($where)->save();
  return $res;
 }
 //验证用户是否永久登录(记住我)
 public function checkRemember(){
  $arr = array();
  $now = time();
  list($identifier,$token) = explode(':',$_cookie['auth']);
  if (ctype_alnum($identifier) && ctype_alnum($token)){
   $arr['identifier'] = $identifier;
   $arr['token'] = $token;
  }else{
   return false;
  }
  $admin = M("admin");
  $info = $admin->getByidentifier($arr['identifier']);
  if($info != null){
   if($arr['token'] != $info['token']){
    return false;
   }else if($now > $info['timeout']){
    return false;
   }else{
    return $info;
   }
  }else{
   return false;
  }
 }
}

视图 登录页 test.html




 
 document






视图 个人中心 ucenter.html




 
 documenttitle>
</head>
<body>
 <if condition="$session['username'] neq null">
 <i>{$session.username},</i>
 <else />
 <i>游客,</i>
 </if>
 欢迎您<br>
 退出登录
</body>
</html>

</pre>

<p><strong>附:模块目录</strong></p>
<p></p>
<p><strong>补充:小编在这里推荐一款本站的php格式化美化的排版工具帮助大家在以后的PHP程序设计中进行代码排版:<br />
</strong></p>
<p><strong>php代码在线格式化美化工具:</strong>http://tools.jb51.net/code/phpformat</p>
<p>更多关于thinkPHP相关内容感兴趣的读者可查看本站专题:《ThinkPHP入门教程》、《ThinkPHP常用方法总结》、《smarty模板入门基础教程》及《PHP模板技术总结》。</p>
<p>希望本文所述对大家基于ThinkPHP框架的PHP程序设计有所帮助。</p></div>
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