How can repositories in PHP be designed to be domain logic neutral for flexible use?

To design repositories in PHP to be domain logic neutral for flexible use, it is important to separate the data access logic from the domain logic. This can be achieved by creating interfaces for repositories that define common CRUD operations without any domain-specific behavior. Implementations of these interfaces can then be created for specific domain entities, allowing for flexibility and reusability. 

interface RepositoryInterface {
    public function findById($id);
    public function findAll();
    public function save($entity);
    public function delete($entity);
}

class UserRepository implements RepositoryInterface {
    // Implement CRUD operations specific to User entity
}

class ProductRepository implements RepositoryInterface {
    // Implement CRUD operations specific to Product entity
}

Keywords

repositories PHP domain logic design flexible use

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