SetEnv in .htaccess file doesn't seem to work with PHP-FPM

Make sure that mod_env.s or mod_env.so is enabled in your php.ini and Apache config.

Apache 2.4 needs it enabled. Otherwise it could be a configuration setting in PHP-FPM.

if i understnd you correctly, mod_env is installed as an apache module:

Code:

$ sudo apachectl -M | grep env
env_module (shared)
setenvif_module (shared)

Apparently other folks have this problem too:
https://forum.codeigniter.com/thread-68103.html