PHP 8: Change upload_max_filesize - php

Question

I need to increase the values of upload_max_filesize and post_max_size from the default 2M to 10M.
(I need to do this for a specific vhost. Changing the values globally (for all vhosts) in php.ini is not an option.)
When running PHP 7, I did it by having the following in the Apache2 configuration file for the VirtualHost.
php_value upload_max_filesize 10M
php_value post_max_size 10M
After upgrading to PHP 8, these lines no longer work.
I'm running Ubuntu 20.04, and have installed PHP 8 using the following PPA:
sudo add-apt-repository ppa:ondrej/php
Here is how I installed PHP:
sudo apt install php
sudo apt install php-fpm
sudo apt install libapache2-mod-fcgid
sudo a2enmod actions fcgid alias proxy_fcgi
Checking status:
sudo systemctl status php8.1-fpm
php8.1-fpm.service - The PHP 8.1 FastCGI Process Manager
Loaded: loaded (/lib/systemd/system/php8.1-fpm.service; enabled;
Active: active (running) since Sun 2022-08-28 15:32:37 UTC; 1min 30s ago
Docs: man:php-fpm8.1(8)
Main PID: 739 (php-fpm8.1)
[…]
Here is how part of the configuration file looks:
<VirtualHost *:80>
[…]
php_value upload_max_filesize 10M
php_value post_max_size 10M
<FilesMatch \.php$>:
SetHandler proxy:unix:/var/run/php/php8.1-fpm.sock|fcgi://localhost"
</FilesMatch>
[…]
</VirtualHost>
When inspecting PHP configuration, I see:
Directive Local value Master value
upload_max_filesize 2M 2M
What is the right way to do this when using PHP 8?

Answer 1

You have php running via fpm. fpm is a separate process with which apache interacts, in your case, via socket file.
As in my comment, you have 2 options to personalize the php settings:
using ini_set()
separate fpm pool for the specific virtualhost
via ini_set() is the fastest and simplest way, just add the following to the page where you manage the upload
ini_set('upload_max_filesize', '10M');
ini_set('post_max_size', '10M');
The second option is a bit more complicated, you need to configure a new fpm pool. By doing it quickly, just copy the existing configuration, usually in /etc/php/8.1/pool.d) and modify it. They key line are:
listen = /var/run/php/php8.1-fpm.sock
to
listen = /var/run/php/php8.1-mysite-fpm.sock
and add/modify
php_admin_value[upload_max_filesize] = 10M
php_admin_value[post_max_size] = 10M
Restart php-fpm and verify that it goes up without error
Then make your apache virtualhost point to the new socket
<FilesMatch \.php$>:
SetHandler proxy:unix:/var/run/php/php8.1-mysite-fpm.sock|fcgi://localhost"
</FilesMatch>
restart apache and it should work