Explain advanced CDN and edge computing architecture for PHP applications.

CDNs and edge computing reduce latency by moving caching and computation closer to users globally.

As applications scale internationally, geographic latency becomes a major performance bottleneck.

CDNs solve this through globally distributed edge infrastructure.

Core CDN capabilities:

Caches:

API responses cached near users.

Traffic routes to nearest edge location.

Reduces origin server overhead.

Edge networks absorb attacks.

Modern CDNs run logic at edge nodes.…