under Apache + PHP as module you can set
php_value post_max_size 8M
inside a .htaccess.
How can I do this under Ap
I've found an somewhat elegant way to do it: .user.ini files
It seems to be the .htaccess version for PHP-FPM.
You can use
SetEnv PHP_VALUE "post_max_size = 8M"
or
SetEnv PHP_ADMIN_VALUE "post_max_size = 8M"
in the apache configuration.