CodeIgniter 3 to CodeIgniter 4 Migration: Upgrading Legacy Namespace-less PHP Code to Modern PSR-4 Architecture
Understanding the Core Differences: CI3 vs. CI4 Migrating from CodeIgniter 3 (CI3) to CodeIgniter 4 (CI4) is not a simple version bump; it’s a fundamental architectural shift. CI3, while robust for its time, largely operated without strict adherence to modern PHP standards like PSR-4 autoloading and namespaces. CI4, conversely, is built from the ground up […]