芜湖不芜
DEDECMS 后台登录空白找include/userlogin.class.php里面的keepuser()函数，把@session_register 全部改写， 虽然不知道这个@是什么意思把@session_register($this->keepUserIDTag); 注释掉，然后改为if (!isset($_SESSION[$this->keepUserIDTag]))全部有6个。如下：123456789101112131415161718if (!isset($_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] = $adminstyle;然后就可以登入后台了。问题原因：session_register，php5.4移除了这个函数，版本里说明，继续使用该函数会产生错误。if (!isset($_SESSION[$this->keepUserTypeTag]))改成这个方式就可以了