The solution to Zen Tao failed to upload files

Today, I found a problem when using ZenTao to upload files. I can upload files of dozens of kilobytes, but I can't upload files of several megabytes. Open source version 9.8.1).

In the official documentation, you can see that you need to adjust the post_max_size and upload_max_filesize values in php.ini, and then restart apache to take effect:

#cd /opt/zbox/etc/php
#vim php.ini
...........
register_argc_argv = Off
auto_globals_jit = On
post_max_size = 50M
magic_quotes_gpc = Off
magic_quotes_runtime = Off
magic_quotes_sybase = Off
............
file_uploads = On
upload_tmp_dir = "/opt/zbox/tmp/"
upload_max_filesize = 50M
allow_url_fopen = On
allow_url_include = Off
default_socket_timeout = 60
............

After I went in, I saw that mine was 50M, indicating that it was not a space problem. Then I saw from Baidu that I needed to modify the $config->debug parameter in my.php, and change false to true:

#cd /opt/zbox/app/zentao/config
#vim my.php
<?php
$config->installed       = true;
$config->debug           = true;
$config->requestType     = 'PATH_INFO';
$config->db->host        = '127.0.0.1';
$config->db->port        = '3307';
$config->db->name        = 'zentao';
$config->db->user        = 'root';
$config->db->password    = '123456';
$config->db->prefix      = 'zt_';
$config->webRoot         = getWebRoot();
$config->default->lang   = 'zh-cn';

After restarting, I submitted it again, and found that I still could not upload the large file. I had no choice but to check the Zendao log and found the following error:

16:02:30 ERROR: SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: YES) in /opt/zbox/app/zentaobiz/framework/base/router.class.php on line 2145, last called by /opt/zbox/app/zentaobiz/framework/base/router.class.php on line 2103 through function connectByPDO.
 in /opt/zbox/app/zentaobiz/framework/base/router.class.php on line 2196 when visiting

Looking at the log, it seems to be a problem of permissions. At this time, I was thinking about why small files can be uploaded if the permissions are wrong, but large files can't, which is obviously wrong. Then I was investigating, and suddenly I thought whether it was a problem with nginx proxy again, and I started again. View the configuration file of nginx, and add a line of client_max_body_size 1024M to the place where ZenTao proxy is configured;

#vim nginx.conf
worker_processes  1;
        events {
                worker_connections  1024;
        }
        http {
              include       mime.types;
              default_type  application/octet-stream;
              sendfile        on;
              keepalive_timeout  65;
server
  {
    listen 80;
    server_name zbox.gong-hui.com;
    location / {
        client_max_body_size 1024M;
        proxy_redirect off;
        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://192.168.3.175:81;
               }
  }

Then restart nginx, and then enter Zen Tao to upload large files, wow, successfully uploaded!

The solution to Zen Tao failed to upload files

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