PHP 5.4相对与5.3的变化还是很大的，废除了不少原因的函数，这也导致了一些CMS无法完美支持的问题，比如DedeCMS系统。

在PHP 5.4下，登录DedeCMS后台输入用户名和密码后没有提示显示为空白，主要原为是php5.4的版本废除了session_register函数。可以采用如$_SESSION[$this->keepUserIDTag] = $this->userID; 这种方式处理完整代码如下：

解决方法一：

打开 include/userlogin.class.php这个文件，在287行到308行原内容如下：

@session_register($this->keepUserIDTag);

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

@session_register($this->keepUserTypeTag);

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

@session_register($this->keepUserChannelTag);

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

@session_register($this->keepUserNameTag);

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

@session_register($this->keepUserPurviewTag);

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

@session_register($this->keepAdminStyleTag);

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

PutCookie(‘DedeUserID’, $this->userID, 3600 * 24, ‘/’);

PutCookie(‘DedeLoginTime’, time(), 3600 * 24, ‘/’);

替换成

global $admincachefile,$adminstyle;

if(empty($adminstyle)) $adminstyle = ‘dedecms’;

//@session_register($this->keepUserIDTag);

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

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

//@session_register($this->keepUserTypeTag);

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

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

// @session_register($this->keepUserChannelTag);

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

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

//@session_register($this->keepUserNameTag);

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

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

//@session_register($this->keepUserPurviewTag);

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

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

// @session_register($this->keepAdminStyleTag);

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

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

PutCookie(‘DedeUserID’, $this->userID, 3600 * 24, ‘/’);

PutCookie(‘DedeLoginTime’, time(), 3600 * 24, ‘/’);

至此问题解决。

解决方法二：

找到include文件夹中的userlogin.class.php文件中把所有带有session_register的全部删除即可。

@session_register下的所有语句屏蔽掉

function keepUser()

{

if($this->userID != ” && $this->userType != ”)

{

global $admincachefile,$adminstyle;

if(empty($adminstyle)) $adminstyle = ‘dedecms’;

代码如下复制代码

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

PutCookie(‘DedeUserID’, $this->userID, 3600 * 24, ‘/’);

PutCookie(‘DedeLoginTime’, time(), 3600 * 24, ‘/’);

$this->ReWriteAdminChannel();

return 1;

}

else{….以下省略