SingleResponsibilityExample.php

<?php
namespace Report;
use Report\Repositories\OrdersRepository;

class OrdersReport
{
	protected $repo;
	protected $formatter;

	public function __construct(OrdersRepository $repo, OrdersOutPutInterface $formatter)
	{
		$this->repo = $repo;
		$this->formatter = $formatter;
	}

	public function getOrdersInfo($startDate, $endDate)
	{
		$orders = $this->repo->getOrdersWithDate($startDate, $endDate);

		return $this->formatter->output($orders);
	}
}

namespace Report;

interface OrdersOutPutInterface
{
	public function output($orders);
}

namespace Report;

class HtmlOutput implements OrdersOutPutInterface
{
	public function output($orders)
	{
		return '<h1>Orders: ' . $orders . '</h1>';
	}

}

namespace Report\Repositories;
use DB;

class OrdersRepository
{
    public function getOrdersWithDate($startDate, $endDate)
    {
        return DB::table('orders')->whereBetween('created_at', [$startDate, $endDate])->get();
    }
}