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HomeBackend DevelopmentPHP TutorialYii 登录的时候 “记住我” 是怎么实现的呢?

SESSION 和 COOKIE 的原理 我大致清晰。

我问了同事说最好配合表一起实现“记住我”,可是Yii这个没有用表的啊

就是想了解Yii的内部实现是怎么回事?

回复内容:

SESSION 和 COOKIE 的原理 我大致清晰。

我问了同事说最好配合表一起实现“记住我”,可是Yii这个没有用表的啊

就是想了解Yii的内部实现是怎么回事?

你用的是yii1么?如果是继续往下看
在yii的源码framework/web/auth/CWebUser.php里,登录方法如下
第二个参数duration就是是否记住的设置,yii默认生成的表单里会传入86400就是30天

    public function login($identity,$duration=0)
    {
        $id=$identity->getId();
        $states=$identity->getPersistentStates();
        if($this->beforeLogin($id,$states,false))
        {
            $this->changeIdentity($id,$identity->getName(),$states);

            if($duration>0)
            {
                if($this->allowAutoLogin)
                    $this->saveToCookie($duration);
                else
                    throw new CException(Yii::t('yii','{class}.allowAutoLogin must be set true in order to use cookie-based authentication.',
                        array('{class}'=>get_class($this))));
            }

            if ($this->absoluteAuthTimeout)
                $this->setState(self::AUTH_ABSOLUTE_TIMEOUT_VAR, time()+$this->absoluteAuthTimeout);
            $this->afterLogin(false);
        }
        return !$this->getIsGuest();
    }

注意看saveToCookie方法,里面依赖于CSecurityManagerhashData方法,继续跟踪下去,可以发现依赖于CStatePersister存储的一些状态信息,而这个信息通常位于/path/to/app/protected/runtime/state.bin里。

简单的说,只要拿不到你的state.bin,拿不到你的程序路径,就没法伪造

cookie 记住帐号,数据库建一个记住帐号的表,当这台电脑访问的时候把cookie的帐号发给服务器,去查是否存在这个帐号,就跳过验证密码

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