Learn PHOENIX with Real Code Examples
Updated Nov 27, 2025
Architecture
MVC architecture
Functional programming and immutable state
OTP supervision trees for fault tolerance
Channels for real-time communication
Ecto for database interactions and migrations
Rendering Model
HTTP request -> Router -> Controller -> Context -> View -> HEEx Template -> Response
Channels handle WebSocket connections for real-time updates
Ecto schemas manage database interactions
Supervision trees maintain process reliability
Functional pipelines ensure predictable transformations
Architectural Patterns
MVC pattern
Functional programming principles
OTP supervision trees
PubSub messaging for real-time features
Contexts for domain separation
Real World Architectures
Real-time chat systems
High-concurrency APIs for mobile apps
Live dashboards and analytics tools
Fault-tolerant backend systems
Distributed microservices with Phoenix and Elixir
Design Principles
Functional programming and immutability
High concurrency and fault tolerance
Hot code reload for productivity
Real-time communication built-in
Maintainable and testable architecture
Scalability Guide
Use PubSub for distributed messaging
Optimize Ecto queries and indexes
Scale horizontally with BEAM clustering
Leverage lightweight processes for concurrency
Monitor system metrics and tune supervisor trees
Migration Guide
Upgrade Elixir and Phoenix versions
Refactor deprecated APIs
Migrate database schemas using Ecto
Test Channels and LiveView functionality
Monitor logs for runtime issues