Domain-Driven Design in PHP

In-Memory Implementation

As an example, if we wanted to replicate the latestPosts query method in our PostRepository by using a Specification for an in-memory implementation, it would look like this:

namespace Infrastructure\Persistence\InMemory;use Domain\Model\Post;interface InMemoryPostSpecification{    /**     * @return boolean     */     public function specifies(Post $aPost);}

The in-memory implementation for the latestPosts behavior could look like this:

namespace Infrastructure\Persistence\InMemory;use Domain\Model\Post;class InMemoryLatestPostSpecification    implements InMemoryPostSpecification{    private $since;    public function __construct(\DateTimeImmutable $since)    {       $this->since = $since;    }    public function specifies(Post $aPost)    { return $aPost->createdAt() ...