从事php工作，最近使用 php5.4 后发现织梦网的后台登陆显示空白。查找原因，在php5.4的说明中看到了其取消了对session_register的支持。

解决方法：找include/userlogin.class.php里面的keepuser()函数，将其修改为以下代码即可

function keepUser(){
    if($this->userID != '' && $this->userType != ''){
                global $admincachefile,$adminstyle;
                if(empty($adminstyle)) $adminstyle = 'dedecms';

                if (!isset($_SESSION[$this->keepUserIDTag]))

                $_SESSION[$this->keepUserIDTag] = $this->userID;
                if (!isset($_SESSION[$this->keepUserTypeTag]))

                $_SESSION[$this->keepUserTypeTag] = $this->userType;
                if (!isset($_SESSION[$this->keepUserChannelTag]))

                $_SESSION[$this->keepUserChannelTag] = $this->userChannel;
                if (!isset($_SESSION[$this->keepUserNameTag]))

                $_SESSION[$this->keepUserNameTag] = $this->userName;
                if (!isset($_SESSION[$this->keepUserPurviewTag]))

                $_SESSION[$this->keepUserPurviewTag] = $this->userPurview;
                if (!isset($_SESSION[$this->keepAdminStyleTag]))

                $_SESSION[$this->keepAdminStyleTag] = $adminstyle;

                PutCookie('DedeUserID', $this->userID, 3600 * 24, '/');
                PutCookie('DedeLoginTime', time(), 3600 * 24, '/');

                $this->ReWriteAdminChannel();

                return 1;
        }else{
              return -1;
        }
}