Learn SYMFONY with Real Code Examples
Updated Nov 27, 2025
Architecture
MVC (Model-View-Controller) architecture
Bundles for modular feature encapsulation
Dependency Injection container for services
Event Dispatcher for decoupled event handling
Twig templating engine for presentation layer
Rendering Model
Controller handles request
Service or business logic executed
Data passed to Twig template
Template rendered as HTML response
Response returned to client
Architectural Patterns
MVC - separation of concerns
Dependency Injection - service management
Event Dispatcher - decoupled event handling
Bundle architecture - modular extensions
ORM for data persistence (Doctrine)
Real World Architectures
Enterprise CRM platform with modular bundles
E-commerce platform with API backend
Content management system serving thousands of users
Microservices architecture using Symfony components
Event-driven systems with Messenger and RabbitMQ
Design Principles
Reusable components for modularity
MVC architecture for structured code
Dependency Injection for decoupled services
Convention over configuration with Flex
Extensible via bundles and third-party packages
Scalability Guide
Use caching (HTTP, Doctrine, Twig)
Optimize Doctrine queries and indexing
Distribute workload via multiple web servers
Use message queues for background processing
Monitor performance and scale databases horizontally
Migration Guide
Update PHP version and dependencies
Upgrade Symfony components via Composer
Refactor deprecated APIs
Test routes, controllers, and services
Deploy incrementally to avoid downtime