What is CodeIgniter 4 modular architecture patterns?
Answer
Building a modular CI4 application involves organizing code into self-contained feature modules. Register module namespaces in app/Config/Autoload.php: $psr4 = ["App" => APPPATH, "Modules\Blog" => ROOTPATH . "modules/Blog", "Modules\Auth" => ROOTPATH . "modules/Auth"]. Each module has its own directory: modules/Blog/Controllers/, models/, Views/, Config/, Database/Migrations/. Routes: include module routes in the main routes file: require ROOTPATH . "modules/Blog/Config/Routes.php". Config: module config files are auto-discovered if they extend BaseConfig. Module migrations: php spark migrate --namespace=Modules\Blog. This architecture improves code organization and allows modules to be enabled/disabled by adding/removing the namespace registration. The modular pattern is especially valuable for large teams where different teams own different feature modules.