General   Architecture, design, OOP

Where to add helper classes of model values? (3)
yii2-app-advanced with multiple console applications (3)
Beginners Question: structurizing the app (13)
Where should I put factory classes? (2)
Immutable objects (1)
Modular architecture with hooks for apps (2)
Reducing complexity (4)
Should form models extend the base ActiveRecord model or not? (2)
What Is Proper Place for SQL Queries That Don't Fit the Normal ActiveQuery Framework (6)
BPMN - Business Process Model and Notation in Yii 2 (2)