Solution to the blank background login problem of Dedecms after PHP5.4 and later versions

Why is there a blank background login in Dedecms after PHP5.4 or later? This article will give you a detailed analysis to find out the real reasons and solutions.

Why is there a blank background login in Dedecms after PHP5.4 or later? This article will give you a detailed analysis to find out the real reasons and solutions.

Upgrade the PHP version from 5.2.14 to 5.4.15. After the upgrade, the dedecms background opens a blank space and checks various permissions and files. There is no problem. Find them ,, it turns out to be a PHP version function. It uses session_register to register a session variable, but this function has been removed from php5.4 and later versions.
Solution:
Find include/userlogin. class. php, which contains a keepuser () function, which uses session_register to register a session variable, but this function has been removed in php5.4. For details, see the official website:

If this php version is used, errors will occur, but we can modify the code:
Comment out @ session_register ($ this-> keepUserIDTag), and change it
If (! Isset ($ _ SESSION [$ this-> keepUserIDTag])
There are a total of six, all changed to the following:

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;

Log on to the background again to go to the Management page.
Because I am not familiar with PHP, it is generally said on the Internet that the data/common. inc. PHP file encoding problem, the encoding should be changed to a non-BOM format file to save, It is not said that it is a problem with php5.4
Another method:
Add the following code at the end of include/helpers/util. helper. php:

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 ();

In this way, dedecms can be used normally under php5.4. We hope the two methods shared in this article can help you solve the problem smoothly.