Otdfbt

This is a common question but I double checked suggested solutions without success.

These are the errors from PHP:

Warning: move_uploaded_file(images/img01.jpg): failed to open stream: Permission denied in /usr/share/nginx/html/media/test.php on line 28

Warning: move_uploaded_file(): Unable to move '/tmp/phpRvUCVx' to 'images/img01.jpg' in /usr/share/nginx/html/media/test.php on line 28

The server has installed nginx with php 7.3 (php-fpm)

Permissions on upload folder:

 drwxrwxrwx. 2 nginx nginx 6 Apr 5 03:11 images

Information from ps aux | grep php

centos 24211 0.0 0.0 112708 980 pts/0 S+ 16:01 0:00 grep --color=auto php
root 24674 0.0 0.6 285532 11452 ? Ss Apr04 0:04 php-fpm: master process (/etc/opt/remi/php73/php-fpm.conf)
nginx 24675 0.0 0.4 287740 8724 ? S Apr04 0:00 php-fpm: pool www
nginx 24676 0.0 0.4 287740 8720 ? S Apr04 0:00 php-fpm: pool www
nginx 24677 0.0 0.4 287740 8684 ? S Apr04 0:00 php-fpm: pool www
nginx 24678 0.0 0.5 287916 9232 ? S Apr04 0:00 php-fpm: pool www
nginx 24679 0.0 0.5 287916 9308 ? S Apr04 0:00 php-fpm: pool www
nginx 25107 0.0 0.4 287740 8716 ? S Apr04 0:00 php-fpm: pool www

Information from ps aux | grep nginx

root 15041 0.0 0.1 125116 2324 ? Ss Apr04 0:00 nginx: master process /usr/sbin/nginx
nginx 15042 0.0 0.2 125956 5328 ? S Apr04 0:00 nginx: worker process
nginx 15043 0.0 0.2 125956 5328 ? S Apr04 0:00 nginx: worker process
nginx 24675 0.0 0.4 287740 8724 ? S Apr04 0:00 php-fpm: pool www
nginx 24676 0.0 0.4 287740 8720 ? S Apr04 0:00 php-fpm: pool www
nginx 24677 0.0 0.4 287740 8684 ? S Apr04 0:00 php-fpm: pool www
nginx 24678 0.0 0.5 287916 9272 ? S Apr04 0:00 php-fpm: pool www
nginx 24679 0.0 0.5 287916 9308 ? S Apr04 0:00 php-fpm: pool www
nginx 25107 0.0 0.4 287740 8716 ? S Apr04 0:00 php-fpm: pool www
centos 26097 0.0 0.0 112712 976 pts/0 S+ 16:39 0:00 grep --color=auto nginx

Configuration for PHP-FPM

user = nginx
group = nginx
listen = /var/run/php73-fpm/php73-fpm.sock
listen.owner = nginx
listen.group = nginx

What I missing ? Thanks in advanced

You've got multiple issues here, probably some of which you introduced yourself while trying to solve the original problem.

First, your PHP process seems to be running as the nginx user. This was not the default configuration, and is not recommended. You should let it run with its own user ID as it was originally set up.

Second, the permission of your images directory allows all users to write to it. This is obviously a bad idea, and should never be done, not even for "testing". Set the ownership and permissions appropriately. If it ever crosses your mind that chmod 777 might help you, remember you are going down a wrong path.

Third, you appear to have placed your web site files under /usr/share/nginx/html. You should not use this directory for your own files; it is intended only for default files shipped with nginx. Use a directory under /srv instead, such as /srv/www. Also avoid /var/www, which is another directory reserved for web server default files (usually those shipped by Apache httpd).

Finally, for the immediate problem, SELinux does not allow nginx or php-fpm to write to random directories. You need to tell SELinux that the directory and its contents should be writable by setting its default context to httpd_sys_rw_content_t and then setting the context of any existing files. For example:

semanage fcontext -a -t httpd_sys_rw_content_t "/srv/www/wherever/images(/.*)?"
restorecon -rv /srv/www/wherever/images