Symfony4 - Deep dive

1. SYMFONY4
What’s New?

2. “Symfony is a set of PHP Components,
a Web Application framework, a
Philosophy, and a Community — all
working together in harmony.

3. KEYNOTE
➤ Introduction
➤ What’s new?
➤ Monolith VS Microservice
➤ Symfony Flex
➤ Maker Bundle
➤ New Components!

4. SYMFONY ROADMAP

5. WHAT’S NEW?
➤ 30% Smaller Symfony3
➤ No more bundle inheritance!
➤ Bundles App
➤ Dotenv Component
➤ DI - Auto-configure and auto-wiring services
➤ Caching Component

6. SMALLER?

7. NO BUNDLES INHERITANCE
• Controllers: define a route with the same path as the controller you want to override and implement your own logic.
• Templates: use the common template overriding mechanism with the traditional app/Resources/<BundleName>/views/
<templateName>.html.twig dir or the new templates/bundles/<BundleName>/<templateName>.html.twig dir on Symfony 3.4 and
higher; you can also use Twig namespaces to define new templates under the same namespace as the bundle you want to
customize.
• Routing: don't load the bundle routes or apply the same technique as controllers.
• Services and Configuration: use compiler passes or service decoration.
• Entities: not possible unless the bundle provides a mapped superclass.
• Forms: use form extensions.
• Validation: not possible unless the bundle provides validation groups.
• Translations: not related to bundle inheritance; just override the right translation domain.

8. NO BUNDLES!

9. BUNDLES DEFINITION

10. BUNDLES DEFINITION

11. BUNDLES CONFIG - SYMFONY 3!

12. BUNDLES CONFIG - SYMFONY 4

13. Monolith vs Micro
➤ Includes Everything!
➤ Silex VS. Symfony SE
➤ It ships with code that isn‘t
used in all individual projects.
The Symfony SE is often
perceived as being „big“.
➤ Removing not needed
functionality is a cumbersome
task.

16. SYMFONY FLEX 🎁

17. What is Symfony Flex?
• Flex prefers composition over inheritance.
• New project start with almost no dependencies.
• Only needed features are added by developers.
• hooks into the Composer workflow
• automatically enables Symfony bundles
• executes predefined recipes when packages are installed
• recipes are removed when packages are uninstalled

18. FLEX RECIPE!

19. The supported environments are dev, prod, test and all (which enables the bundle in all environments):
FLEX RECIPE!
The previous recipe is transformed into the following PHP code:

20. FLEX RECIPES - CONTRIBUTIONS

21. FLEX RECIPES - INTERACTIVE

22. FLEX RECIPES - INTERACTIVE

23. DISCOVER ALIASES AND PACKS

24. MAKER BUNDLE
The update of SensioGeneratorBundle, Use make: instead of generate:

25. MAKER BUNDLE COMMANDS

26. COMPONENTS
➤ DotENV
➤ Dependency Injection
➤ Workflow
➤ Cache

27. DOTENV COMPONENT
The Dotenv Component parses .env files to make environment variables
stored in them accessible via getenv(), $_ENV or $_SERVER.
Access the value with getenv() in your code:

28. DEPENDENCY INJECTION

29. WORKING WITH INTERFACES

30. AUTOWIRING - WORKING WITH INTERFACES

32. PUBLIC SERVICE

33. PUBLIC SERVICE

34. ➤ Place: the states a workflow can be in
➤ Transition: an action that brings the workflow from one place into another
➤ Definition: the places of a workflow and the transitions to get from one place to another
➤ Marking: the current state of the workflow, stored in a MarkingStore
WORKFLOW COMPONENT

35. CREATE WORKFLOW

36. CREATE WORKFLOW

37. CREATE WORKFLOW

38. WORKFLOW EVENTS
➤ workflow.leave before a place is left
➤ workflow.transition before a transition is applied
➤ workflow.enter before a place is entered
➤ workflow.entered after a place has been entered
➤ workflow.completed after a transition was applied
➤ workflow.announce announces all enabled transitions
More On workflow: twig functions, more events check: https://symfony.com/doc/current/workflow/usage.html

39. THE CACHE COMPONENT
➤ The Cache component provides an extended PSR-6 implementation as well as a PSR-16 "Simple Cache"
implementation for adding cache to your applications. It is designed to have a low overhead and it ships with
ready to use adapters for the most common caching backends.
➤ support to convert PSR-16 caches to PSR-6 adapters and vice versa.
➤ i.e: PSRs stands for PHP Standard Recommendations

40. SIMPLE CACHING (PSR-16)

41. MORE ADVANCED CACHING (PSR-6)

42. ITEM INTERFACE

43. POOL INTERFACE

44. MORE ADVANCED CACHING (PSR-6)

45. CREATE CUSTOM POOL
Cleaning Cache Pools

46. CONTACT ME
➤ salma.abdelhady@tajawal.com
➤ https://github.com/SalmaAbdelhady
➤ https://www.linkedin.com/in/salmahabdelhady/