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Discuz X3.3 -> X3.5 Side Notes

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AI Translation
This post is translated from Chinese into English through AI.View Original
AI-generated summary
The current versions of WordPress and Discuz! do not support PHP8+ and need to be upgraded. There are specific steps and configurations to follow during the upgrade process, including closing the site in the admin panel and ensuring proper communication between DiscuzUC. Issues during the upgrade often arise from incorrect configuration files. After the upgrade, the founder may have trouble accessing the admin panel and may need to modify the user group in the database. It is also important to update the cache and address any issues with avatar updates. The compatibility of Discuz! with PHP8 is not perfect, particularly with the $_G'settings' attribute, which may require modifying certain statements.

Prologue#

PHP8+ is required for both WordPress and the current version of Discuz! on the server. An upgrade is needed.

Official#

Discuz Wiki and forum post.

Corrections#

Taking the Discuz! directory on the server as the root directory "/":

  1. First, disable the site in the backend management/uc_server/admin.php.
  2. UC communication is considered normal when both sides, Discuz <-> UC, are functioning properly. Both sides need to confirm.
  3. Regarding UC_KEY: /uc_server/data/config.inc.php and /config/config_ucenter.php can be different. Use the existing one and do not change it to be the same as the official guide requires, otherwise Discuz -> UC will fail.
  4. Regarding UC_DBTABLEPRE: /uc_server/data/config.inc.php and /config/config_ucenter.php are different. The config of Discuz! should include the prefix of dbName.
  5. Most issues during the upgrade process come from these two configuration files being incorrect.
  6. If the site is not disabled, the Discuz upgrade will get stuck after the envcheck step. Refresh once to resolve.
  7. After the upgrade, the original founder can log in to the forum but cannot access the admin backend. If it is a user group issue, you can directly modify the database with update [table]common_member set groupid=1 where uid=%d;.
  8. After the upgrade, remember to update the cache, otherwise the style will be lost.
  9. After the upgrade, users cannot update their avatars, which is also a UC communication issue.
  10. Discuz! is not fully compatible with PHP8, especially the $_G['settings']['bannedmessages'] attribute. This attribute uses string concatenation when generated in admincp, but uses bitwise operations when validating related flags. This causes an error of Uncaught TypeError: Unsupported operand types: string & int when using statements like $_G['settings']['bannedmessages'] & 1. To fix this, change the relevant statements to intval($_G['settings']['bannedmessages']) & 1.
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