I tried installing Blackfire. And it's working. However, I'm getting this warning, whenever I run a PHP-command:

PHP Warning: Module 'blackfire' already loaded in Unknown on line 0

Just like explained here: PHP Warning: Module already loaded in Unknown on line 0.

The solution there is, that the module is loaded more than once, which sounds like the problem I have as well.

The thing is, that I have two services handling PHP:

• nginx
• php7.4-fpm

How do I know which of them should load this Blackfire-library?

---

Further details

If I do this: `grep -R "blackfire" /etc/php/7.4/

then I get this:

./fpm/conf.d/99-blackfire.ini:[blackfire]
./fpm/conf.d/99-blackfire.ini:extension=blackfire.so
./fpm/conf.d/99-blackfire.ini:blackfire.log_level=1
./fpm/conf.d/90-blackfire.ini:[blackfire]
./fpm/conf.d/90-blackfire.ini:extension=blackfire.so
./fpm/conf.d/90-blackfire.ini:blackfire.agent_socket = unix:///var/run/blackfire/agent.sock
./fpm/conf.d/90-blackfire.ini:;blackfire.server_id =
./fpm/conf.d/90-blackfire.ini:;blackfire.server_token =
./fpm/conf.d/90-blackfire.ini:;blackfire.apm_enabled = 1
./fpm/conf.d/90-blackfire.ini:;blackfire.log_level = 3
./fpm/conf.d/90-blackfire.ini:;blackfire.log_file = /tmp/blackfire.log
./cli/conf.d/99-blackfire.ini:[blackfire]
./cli/conf.d/99-blackfire.ini:extension=blackfire.so
./cli/conf.d/99-blackfire.ini:blackfire.log_level=1
./cli/conf.d/90-blackfire.ini:[blackfire]
./cli/conf.d/90-blackfire.ini:extension=blackfire.so
./cli/conf.d/90-blackfire.ini:blackfire.agent_socket = unix:///var/run/blackfire/agent.sock
./cli/conf.d/90-blackfire.ini:;blackfire.server_id =
./cli/conf.d/90-blackfire.ini:;blackfire.server_token =
./cli/conf.d/90-blackfire.ini:;blackfire.apm_enabled = 1
./cli/conf.d/90-blackfire.ini:;blackfire.log_level = 3
./cli/conf.d/90-blackfire.ini:;blackfire.log_file = /tmp/blackfire.log
./mods-available/blackfire.ini:[blackfire]
./mods-available/blackfire.ini:extension=blackfire.so
./mods-available/blackfire.ini:blackfire.agent_socket = unix:///var/run/blackfire/agent.sock
./mods-available/blackfire.ini:;blackfire.server_id =
./mods-available/blackfire.ini:;blackfire.server_token =
./mods-available/blackfire.ini:;blackfire.apm_enabled = 1
./mods-available/blackfire.ini:;blackfire.log_level = 3
./mods-available/blackfire.ini:;blackfire.log_file = /tmp/blackfire.log

I can see that there is a fpm-folder and a cli-folder. And that there are two blackfire-ini-files: 90-blackfire.ini and 99-blackfire.ini.

How do I know which files is being used?