解决更换PHP5.4以上版本后Dedecms后台登录空白问题的方法,php5.4dedecms
把PHP的版本从5.2.14升到了5.4.15,升级完后dedecms后台却打开空白,检查了各种权限和文件,都没有问题,找来找去,原来是PHP版本函数的问题,它是用session_register来注册一个session变量,但是在php5.4以上中已经移除了这个功能
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[$this->keepUserIDTag]))
一共有六个,全部改为下面这样:
if (!isset($_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;
重新进入后台登录,就可以正常跳转到管理页面了。
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版本的问题
另外一种方法:
在include/helpers/util.helper.php末尾加入以下代码
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();
这样php5.4下dedecms就能正常使用了,希望本文分享的两种方法都可以帮助大家顺利解决问题。

Thedifferencebetweenunset()andsession_destroy()isthatunset()clearsspecificsessionvariableswhilekeepingthesessionactive,whereassession_destroy()terminatestheentiresession.1)Useunset()toremovespecificsessionvariableswithoutaffectingthesession'soveralls

Stickysessionsensureuserrequestsareroutedtothesameserverforsessiondataconsistency.1)SessionIdentificationassignsuserstoserversusingcookiesorURLmodifications.2)ConsistentRoutingdirectssubsequentrequeststothesameserver.3)LoadBalancingdistributesnewuser

PHPoffersvarioussessionsavehandlers:1)Files:Default,simplebutmaybottleneckonhigh-trafficsites.2)Memcached:High-performance,idealforspeed-criticalapplications.3)Redis:SimilartoMemcached,withaddedpersistence.4)Databases:Offerscontrol,usefulforintegrati

Session in PHP is a mechanism for saving user data on the server side to maintain state between multiple requests. Specifically, 1) the session is started by the session_start() function, and data is stored and read through the $_SESSION super global array; 2) the session data is stored in the server's temporary files by default, but can be optimized through database or memory storage; 3) the session can be used to realize user login status tracking and shopping cart management functions; 4) Pay attention to the secure transmission and performance optimization of the session to ensure the security and efficiency of the application.

PHPsessionsstartwithsession_start(),whichgeneratesauniqueIDandcreatesaserverfile;theypersistacrossrequestsandcanbemanuallyendedwithsession_destroy().1)Sessionsbeginwhensession_start()iscalled,creatingauniqueIDandserverfile.2)Theycontinueasdataisloade

Absolute session timeout starts at the time of session creation, while an idle session timeout starts at the time of user's no operation. Absolute session timeout is suitable for scenarios where strict control of the session life cycle is required, such as financial applications; idle session timeout is suitable for applications that want users to keep their session active for a long time, such as social media.

The server session failure can be solved through the following steps: 1. Check the server configuration to ensure that the session is set correctly. 2. Verify client cookies, confirm that the browser supports it and send it correctly. 3. Check session storage services, such as Redis, to ensure that they are running normally. 4. Review the application code to ensure the correct session logic. Through these steps, conversation problems can be effectively diagnosed and repaired and user experience can be improved.

session_start()iscrucialinPHPformanagingusersessions.1)Itinitiatesanewsessionifnoneexists,2)resumesanexistingsession,and3)setsasessioncookieforcontinuityacrossrequests,enablingapplicationslikeuserauthenticationandpersonalizedcontent.


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