Resolved the issue of Discuz 3.4 failing to force upload an avatar (constantly prompting for an avatar upload).

Discuz is already outdated, but many older users are still using it. There's no other way but to solve the problem ourselves.

The problem is: even after enabling mandatory profile picture upload, and uploading a profile picture, the system still says that I do not have permission to post and asks me to upload a profile picture.

The main reason lies in the communication with uc_server. uc_server shows that the communication is successful, but this is not necessarily accurate (the reasons are very complex). Moreover, I enabled HTTPS, which makes the cause even more complicated.

First, perform the HTTPS update for UC Browser:Resolving UCENTER communication failures after implementing HTTPS on Discuz

The problem then arose with retrieving the avatar. In uc_client/client.php, you can find...

$path = $matches['path'] ? $matches['path'].($matches['query'] ? '?'.$matches['query'] : '') : '/';

Add the following:

$matches['port'] = !empty($matches['port'])&&$scheme=='https' ? $matches['port'] : 443;

Then find:

if(!$fp = @fsocketopen(($ip ? $ip : $host), $port, $errno, $errstr, $timeout)) {

Modified to:

  if($port=='443'){ $temp = 'ssl://'; }else{ $temp = 'http://'; } if(!$fp = @fsocketopen($temp.($ip ? $ip : $host), $port, $errno, $errstr, $timeout)) {

The problem should be fixed by now. If it's not, try the following methods:

Find it in function uc_check_avatar

$res = uc_fopen2($url, 500000, ”, ”, TRUE, UC_IP, 20);

Revised to:

$res = trim(uc_fopen2(UC_API.'/avatar.php?uid=$uid&check_file_exists=1'));

The original call was very unstable, sometimes it wouldn't return 1, but the new one directly opens the URL and returns the value.