Description
Applications running on PHP 8.3 can keep frequently used values in a fast in-process user cache. This APCu runtime extension is useful for configuration snapshots, computed data, feature flags, and small lookup tables that do not need a shared database. It is dependency-only and has no separate launcher; PHP code calls APCu functions when enabled. Cache keys, expiration, memory limits, and stored values need review because stale or sensitive data can affect users across requests.