解决更换PHP5.4以上版本后Dedecms后台登录空白问题

if (!isset($_SESSION[$this->keepUserIDTag])) 
//@session_register($this->keepUserIDTag); 
 
$_SESSION[$this->keepUserIDTag] = $this->userID; 
 
if (!isset($_SESSION[$this->keepUserTypeTag])) 
//@session_register($this->keepUserTypeTag); 
 
$_SESSION[$this->keepUserTypeTag] = $this->userType; 
 
if (!isset($_SESSION[$this->keepUserChannelTag])) 
//@session_register($this->keepUserChannelTag); 
 
$_SESSION[$this->keepUserChannelTag] = $this->userChannel; 
 
if (!isset($_SESSION[$this->keepUserNameTag])) 
//@session_register($this->keepUserNameTag); 
 
$_SESSION[$this->keepUserNameTag] = $this->userName; 
 
if (!isset($_SESSION[$this->keepUserPurviewTag])) 
//@session_register($this->keepUserPurviewTag); 
 
$_SESSION[$this->keepUserPurviewTag] = $this->userPurview; 
 
if (!isset($_SESSION[$this->keepAdminStyleTag])) 
//@session_register($this->keepAdminStyleTag); 
 
$_SESSION[$this->keepAdminStyleTag] = $adminstyle; 

function fix_session_register(){  
  function session_register(){  
    $args = func_get_args();  
    foreach ($args as $key){  
      $_SESSION[$key]=$GLOBALS[$key];  
    }  
  }  
  function session_is_registered($key){  
    return isset($_SESSION[$key]);  
  }  
  function session_unregister($key){  
    unset($_SESSION[$key]);  
  }  
}  
if (!function_exists('session_register')) fix_session_register();