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Passing arrays as data structures in PHP is an anti-pattern that creates structural debt. Modern PHP (8.x+) provides readonly value objects, enums, promoted constructors, and strict typing that make explicit data contracts superior to arrays. Arrays allow invalid states and rely on comments, while objects enforce invariants and fail early. When array-shape PHPDocs need more than 3 keys, create an object instead. Keep arrays at system boundaries (HTTP, JSON, database), convert once to objects, and never pass raw arrays deeper into the codebase. PHPStan becomes a design tool that makes invalid states unrepresentable. This approach isn't overengineering—it's professionalism that reduces bugs and makes refactoring mechanical rather than archaeological.

PHP: Stop Passing Arrays Everywhere

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YoanDev

<p>Stop saying to stop doing things.
Just because one method is safer doesn’t mean the other method is wrong.
Its perfectly fine to pass arrays as much as you like</p>
