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#OOP

Object-oriented design: interfaces, dependency injection, value objects and boundaries. Questions under this tag, answered directly.

1 answered questions carry this tag.

Kaan August 28, 2026

How do I cleanly implement "withX" copy methods on readonly value objects?

A readonly withX returns a new instance: `new self` with named arguments is portable, and `clone($this, [...])` fits PHP 8.5 when validation is simple.

#PHP #OOP