php版本为5.4.4
下载的这个：
安装一切都很顺利，直到登录后台的时候，填写完用户名和密码页面就显示一个空白页面，解决办法：
找到include/userlogin.class.php，里面有一个keepuser()函数，它是用session_register来注册一个session变量，但是在php5.4中已经移除了这个功能，见官网介绍：
如果使用的该php版本肯定会出错的，不过我们可以修改下代码：
把@session_register($this->keepUserIDTag); 注释掉，然后改为
if (!isset($_SESSION[$this->keepUserIDTag]))
一共有六个，全部改为下面这样：
1 if (!isset($_SESSION[$this->keepUserIDTag]))
2 //@session_register($this->keepUserIDTag);
3 $_SESSION[$this->keepUserIDTag] = $this->userID;
4
5 if (!isset($_SESSION[$this->keepUserTypeTag]))
6 //@session_register($this->keepUserTypeTag);
7 $_SESSION[$this->keepUserTypeTag] = $this->userType;
8
9 if (!isset($_SESSION[$this->keepUserChannelTag]))
10 //@session_register($this->keepUserChannelTag);
11 $_SESSION[$this->keepUserChannelTag] = $this->userChannel;
12
13 if (!isset($_SESSION[$this->keepUserNameTag]))
14 //@session_register($this->keepUserNameTag);
15 $_SESSION[$this->keepUserNameTag] = $this->userName;
16
17 if (!isset($_SESSION[$this->keepUserPurviewTag]))
18 //@session_register($this->keepUserPurviewTag);
19 $_SESSION[$this->keepUserPurviewTag] = $this->userPurview;
20
21 if (!isset($_SESSION[$this->keepAdminStyleTag]))
22 //@session_register($this->keepAdminStyleTag);
23 $_SESSION[$this->keepAdminStyleTag] = $adminstyle;
2 //@session_register($this->keepUserIDTag);
3 $_SESSION[$this->keepUserIDTag] = $this->userID;
4
5 if (!isset($_SESSION[$this->keepUserTypeTag]))
6 //@session_register($this->keepUserTypeTag);
7 $_SESSION[$this->keepUserTypeTag] = $this->userType;
8
9 if (!isset($_SESSION[$this->keepUserChannelTag]))
10 //@session_register($this->keepUserChannelTag);
11 $_SESSION[$this->keepUserChannelTag] = $this->userChannel;
12
13 if (!isset($_SESSION[$this->keepUserNameTag]))
14 //@session_register($this->keepUserNameTag);
15 $_SESSION[$this->keepUserNameTag] = $this->userName;
16
17 if (!isset($_SESSION[$this->keepUserPurviewTag]))
18 //@session_register($this->keepUserPurviewTag);
19 $_SESSION[$this->keepUserPurviewTag] = $this->userPurview;
20
21 if (!isset($_SESSION[$this->keepAdminStyleTag]))
22 //@session_register($this->keepAdminStyleTag);
23 $_SESSION[$this->keepAdminStyleTag] = $adminstyle;
重新进入后台登录，就可以正常跳转到管理页面了。
PS:关于这个登录后台空白的问题折腾了蛮久，一直找不到解决办法，因为对PHP并不熟，网上一般都说是data/common.inc.php文件编码的问题，把编码要改为无BOM格式文件保存，居然没有说是php5.4的问题，最主要的是织梦官网居然都没做出说明，而且官网论坛上也有人提出这个问题却没有答案，郁闷！不过现在终于是解决了。