Delivery guides

2 guides filed under Delivery. See all 15 guides.

Delivery

Faster Image Delivery: A Practical Guide to CDNs and Browser Caching

Optimizing the file is only half the battle — delivery is the other half. Cache-Control that actually works, immutable fingerprinted assets, the Vary header trap that breaks CDN caching for WebP, and how to read a cache hit ratio.

March 24, 2026 12 min read

Delivery

Serving Next-Gen Image Formats with PHP

Build a small PHP layer that converts images to WebP on first request, caches the result to disk, and serves the right format per browser — no plugin, no third-party service. Complete working code, including the security mistakes to avoid.

December 22, 2025 13 min read