hw4_composer.json

{
    "name": "ahonymous/hw4",
    "description": "Geekhub AdvancedPHP 2015 HW#4",
    "license": "MIT",
    "authors": [
        {
            "name": "Alex Moshta",
            "email": "ahonymous@gmail.com"
        }
    ],
    "autoload": {
        "psr-4": {
            "Layer\\": "src/Layer/"
        }
    },
    "minimum-stability": "stable",
    "require": {
        "php": ">=5.5.0",
        "ext-mysqlnd": "*"
    }
}

hw4_composer.lock

{
    "_readme": [
        "This file locks the dependencies of your project to a known state",
        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
        "This file is @generated automatically"
    ],
    "hash": "bc03f4f2b191acd26409a2d26788fc77",
    "content-hash": "2de558137f6716713ab19599d2619a5c",
    "packages": [],
    "packages-dev": [],
    "aliases": [],
    "minimum-stability": "stable",
    "stability-flags": [],
    "prefer-stable": false,
    "prefer-lowest": false,
    "platform": {
        "php": ">=5.5.0",
        "ext-mysqlnd": "*"
    },
    "platform-dev": []
}

hw4_src_Entity_EntityTrait.php

<?php

namespace Entity;

trait EntityTrait
{
    /**
     * @var \DateTime
     */
    private $createdAt;

    /**
     * @var \DateTime
     */
    private $updatedAt;

    /**
     * @var \DateTime
     */
    private $deletedAt;
}

hw4_src_Layer_Connector_ConnectorInterface.php

<?php

namespace Layer\Connector;

interface ConnectorInterface
{
    /**
     * @param $host
     * @param $user
     * @param $password
     * @return mixed
     */
    public function connect($host, $user, $password);

    /**
     * @param $db
     * @return mixed
     */
    public function connectClose($db);
}

hw4_src_Layer_Manager_Manager.php

<?php

namespace Layer\Manager;

abstract class Manager implements ManagerInterface
{

}

hw4_src_Layer_Manager_ManagerInterface.php

<?php

namespace Layer\Manager;

interface ManagerInterface
{
    /**
     * @param $entity
     * @return mixed
     */
    public function insert($entity);

    /**
     * @param $entity
     * @return mixed
     */
    public function update($entity);

    /**
     * @param $entity
     * @return mixed
     */
    public function remove($entity);

    /**
     * @return mixed
     */
    public function clear();

    /**
     * @param $entityName
     * @param $id
     * @return mixed
     */
    public function find($entityName, $id);

    /**
     * @param $entityName
     * @return mixed
     */
    public function findAll($entityName);

    /**
     * @param $entityName
     * @param array $criteria
     * @return mixed
     */
    public function findBy($entityName, $criteria = []);
}

hw4_web_index.php

<?php

require __DIR__ . '/../vendor/autoload.php';

echo "Hi ALL!";