To configure Nginx to pass PHP-FPM environment variables, you need to make changes to the Nginx configuration file. You can follow these steps:
Open the Nginx configuration file for your website. The file is usually located in the /etc/nginx/sites-available/ directory and could be named something like example.com or default.
Within the server block, find the location ~ \.php$ block. This is the section responsible for handling PHP files.
Add the fastcgi_param directive to pass the PHP-FPM environment variables. For example, if you want to pass the APP_ENV environment variable, add the following line inside the location ~ \.php$ block:
fastcgi_param APP_ENV production;
You can add multiple fastcgi_param directives as needed for other variables.
Save the file and exit.
Test the Nginx configuration to ensure it is valid, and reload or restart Nginx.
sudo nginx -t
sudo systemctl reload nginx
That's it! Now, Nginx will pass the specified environment variables to PHP-FPM when processing PHP files. You can access these variables in your PHP scripts using the $_SERVER superglobal array.