Modernising PHP 7-Era Code

Modernisation should reduce defect risk and clarify contracts. Start with code that is already changing, deprecation hotspots, and boundaries where types or tests expose real errors.

Use This Reference When

• Replace removed syntax and deprecated assumptions first.
• Add types where inputs and failure modes are understood.
• Introduce enums or readonly models where they remove repeated validation.
• Keep refactors reviewable and covered by checks.

Practical Sequence

1. Establish tests and runtime checks.
2. Remove deprecations and incompatible syntax.
3. Tighten one boundary at a time.
4. Adopt modern features where they simplify the model.
5. Measure and deploy in small changes.

Avoid mass syntax rewrites that create a large diff without improving the application’s model or safety.