你是否遇到过PHP5.4版本织梦dedecms后台退出空白的问题，有没有解决呢?没有解决思绪，就来看看我这篇文章吧。

解决办法：

打开include/userlogin.class.php

找到：function exitUser()

{

ClearMyAddon();

@session_unregister($this->keepUserIDTag);

@session_unregister($this->keepUserTypeTag);

@session_unregister($this->keepUserChannelTag);

@session_unregister($this->keepUserNameTag);

@session_unregister($this->keepUserPurviewTag);

DropCookie('dedeAdmindir');

DropCookie('DedeUserID');

DropCookie('DedeLoginTime');

$_SESSION = array();

}

替换为：function exitUser()

{

ClearMyAddon();

#@session_unregister($this->keepUserIDTag);

$_SESSION[$this->keepUserIDTag] = $this->userID;

#@session_unregister($this->keepUserTypeTag);

$_SESSION[$this->keepUserTypeTag] = $this->userType;

#@session_unregister($this->keepUserChannelTag);

$_SESSION[$this->keepUserChannelTag] = $this->userChannel;

#@session_unregister($this->keepUserNameTag);

$_SESSION[$this->keepUserNameTag] = $this->userName;

#@session_unregister($this->keepUserPurviewTag);

$_SESSION[$this->keepUserPurviewTag] = $this->userPurview;

DropCookie('dedeAdmindir');

DropCookie('DedeUserID');

DropCookie('DedeLoginTime');

$_SESSION = array();

}

再去试试吧

小袁亲测可行，如有问题，欢迎交流。