Feature Flags Without Coupling: A Flag Port for the PHP Domain

📰 Dev.to · Gabriel Anhaia

Learn to decouple feature flags from vendors using a port interface in PHP to improve code readability and testability, making it easier to switch vendors if needed

intermediate Published 13 Jun 2026
Action Steps
  1. Define a port interface for feature flags in PHP
  2. Create a readonly DTO to carry flag context information
  3. Implement the port interface using a vendor SDK behind an adapter
  4. Use the port interface in use cases to read feature flag values
  5. Test the use case without relying on the vendor SDK
Who Needs to Know This

Software engineers and developers on a team can benefit from this approach as it allows for more flexibility and maintainability in their codebase, while also making it easier for new team members to understand the code without prior knowledge of specific vendors

Key Insight

💡 Using a port interface to decouple feature flags from vendors improves code readability, testability, and maintainability

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Decouple feature flags from vendors using a port interface in PHP #cleanarchitecture #php

Key Takeaways

Learn to decouple feature flags from vendors using a port interface in PHP to improve code readability and testability, making it easier to switch vendors if needed

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