php does not seem to be setup properly to query system environment variables. The test with getenv(“PATH”) only returns an empty response. Please check the installation documentation ↗ for php configuration notes and the php configuration of your server, especially when using php-fpm.

This security waring is possible to solve by uncommenting PATH in www.conf file.

Open configuration:

vim /etc/php7-fpm.d/www.conf 

remove semicolon from the beginning of this line:

;env[PATH] = /usr/local/bin:/usr/bin:/bin

and reload updated configuration:

/etc/init.d/php7-fpm reload

You can see more detailed info in Installation Guide.