10. Interim Conclusion

Examples 01 through 28 have presented, one by one, all the concepts required by the case study:

controllers, actions, routing, responses, redirects	01 through 05	[config/routes.yaml], folder [src/Controller]
service container, dependency injection	06	[config/services.yaml], all builders
action model, binding, validation constraints	07 through 12	[src/Web/Utils.php] (raw parameter reading), [src/Business/PersonData.php]
views [Twig], template, fragments, macros, extensions	13 to 16	folder [templates], [src/Twig/ViewsExtension.php]
Form component forms, validation, redisplay	17 to 19	folder [src/Form], [templates/macros.html.twig]
POST / Redirect / GET, flash messages, cache	20	[src/Web/Flash.php], [templates/fragments/success.html.twig]
links and buttons, CSRF protection, confirmation window	21	[src/Web/BaseController.php], [fragments/confirmation.html.twig], [public/js/app.js]
internationalization	22	folder [translations], [src/EventListener/SetLanguage.php], [LanguageController.php]
data scope, cache, session, cookies	23	[src/Web/ApplicationModel.php] (cache), [src/Security] (cache, cookies), session
kernel events, listeners, error pages	24	folder [src/EventListener], [templates/error.html.twig]
firewall, JWT authenticator, roles, CAPTCHA, rate limiting	25 to 27	[config/packages/security.yaml], folder [src/Security], [AuthController.php]
Web / business / DAO, [Doctrine], transactions	28	files [src/Entity], [src/Dao], [src/Business]

The case study brings them together into a complete, realistic-sized application (about 100 files, approximately 7,000 lines, including comments). It was written with the same care as the examples: each file begins with a comment explaining its role, and tricky sections are annotated in the code. Each main folder also contains a file named [README.md] that lists its files. The document’s comments highlight what the examples did not show and refer to them for the rest.