How to Fix NGINX Cache Purge on Debian 12 with Custom PHP-FPM Users

Olvy Cache Purger (Purge Nginx FastCGI Cache)

When running NGINX with caching on Debian 12, you may discover that cache purging doesn’t work if your PHP-FPM pool runs under a custom system user instead of the default www-data. This problem becomes very real in multi-tenant environments