Why Purging Nginx Cache Is Only Half the Job (And How I Built the Other Half)

Most Nginx cache plugins for WordPress only purge cached content on updates, leaving the cache cold and forcing the next visitor to endure a full uncached PHP+DB round trip. The author built NPP (Nginx Cache Purge Preload), a plugin that automatically preloads the cache after purging using a 3-layer purge strategy and wget-based preloading, integrating with Redis and Cloudflare APO. NPP's architecture ensures visitors always receive cached responses rather than cold hits.