clear_env boolean
Clear environment in FPM workers. Prevents arbitrary environment variables from reaching FPM worker processes by clearing the environment in workers before env vars specified in this pool configuration are added. Since PHP 5.4.27, 5.5.11, and 5.6.0. Default value: Yes.
Add note on PHP-FPM usage.
For this plugin to work with PHP-FPM, it needs to be configured so that ENVs are exposed to PHP-FPM. The default (https://www.php.net/manual/en/install.fpm.configuration.php) is to strip all ENVs:
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